./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:59:34,413 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:59:34,479 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:59:34,483 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:59:34,484 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:59:34,509 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:59:34,509 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:59:34,510 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:59:34,511 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:59:34,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:59:34,512 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:59:34,512 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:59:34,513 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:59:34,513 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:59:34,514 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:59:34,514 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:59:34,515 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:59:34,515 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:59:34,515 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:59:34,516 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:59:34,516 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:59:34,517 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:59:34,518 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:59:34,518 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:59:34,519 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:59:34,519 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:59:34,520 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:59:34,520 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:59:34,520 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:59:34,521 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:59:34,521 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:59:34,521 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:59:34,522 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:59:34,522 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:59:34,523 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:59:34,523 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:59:34,523 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:59:34,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:59:34,524 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:59:34,524 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:59:34,524 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:59:34,524 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:59:34,524 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:59:34,525 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:59:34,525 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:59:34,525 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:59:34,525 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:59:34,525 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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2023-12-02 16:59:34,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:59:34,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:59:34,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:59:34,767 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:59:34,768 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:59:34,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-12-02 16:59:37,574 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:59:37,744 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:59:37,744 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-12-02 16:59:37,753 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/data/13534e27e/72905c6fe189400cb5b9b38e2cdcb306/FLAG6355fd7b3 [2023-12-02 16:59:37,765 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/data/13534e27e/72905c6fe189400cb5b9b38e2cdcb306 [2023-12-02 16:59:37,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:59:37,768 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:59:37,769 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:59:37,769 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:59:37,774 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:59:37,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:59:37" (1/1) ... [2023-12-02 16:59:37,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf0bc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:37, skipping insertion in model container [2023-12-02 16:59:37,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:59:37" (1/1) ... [2023-12-02 16:59:37,803 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:59:37,922 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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-12-02 16:59:37,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:59:37,978 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:59:37,988 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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-12-02 16:59:38,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:59:38,031 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:59:38,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38 WrapperNode [2023-12-02 16:59:38,032 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:59:38,032 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:59:38,033 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:59:38,033 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:59:38,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (1/1) ... [2023-12-02 16:59:38,047 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (1/1) ... [2023-12-02 16:59:38,068 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2023-12-02 16:59:38,068 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:59:38,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:59:38,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:59:38,069 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:59:38,076 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (1/1) ... [2023-12-02 16:59:38,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (1/1) ... [2023-12-02 16:59:38,078 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (1/1) ... [2023-12-02 16:59:38,079 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (1/1) ... [2023-12-02 16:59:38,084 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (1/1) ... [2023-12-02 16:59:38,089 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (1/1) ... [2023-12-02 16:59:38,091 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (1/1) ... [2023-12-02 16:59:38,092 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (1/1) ... [2023-12-02 16:59:38,094 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:59:38,095 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:59:38,095 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:59:38,095 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:59:38,096 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (1/1) ... [2023-12-02 16:59:38,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:59:38,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:38,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:59:38,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:59:38,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:59:38,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:59:38,169 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-02 16:59:38,169 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-02 16:59:38,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:59:38,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:59:38,170 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-12-02 16:59:38,170 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-12-02 16:59:38,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 16:59:38,170 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 16:59:38,251 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:59:38,254 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:59:38,557 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:59:38,741 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:59:38,741 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 16:59:38,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:59:38 BoogieIcfgContainer [2023-12-02 16:59:38,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:59:38,746 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:59:38,746 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:59:38,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:59:38,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:59:37" (1/3) ... [2023-12-02 16:59:38,749 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11301e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:59:38, skipping insertion in model container [2023-12-02 16:59:38,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:38" (2/3) ... [2023-12-02 16:59:38,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11301e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:59:38, skipping insertion in model container [2023-12-02 16:59:38,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:59:38" (3/3) ... [2023-12-02 16:59:38,751 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2023-12-02 16:59:38,766 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:59:38,766 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:59:38,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:59:38,816 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;@24ded785, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:59:38,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:59:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 16:59:38,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 16:59:38,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:38,828 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:38,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:38,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1955486346, now seen corresponding path program 1 times [2023-12-02 16:59:38,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:38,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057230755] [2023-12-02 16:59:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:38,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:59:39,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:39,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057230755] [2023-12-02 16:59:39,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057230755] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:39,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:39,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 16:59:39,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363578908] [2023-12-02 16:59:39,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:39,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:59:39,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:59:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:59:39,462 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:59:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:39,665 INFO L93 Difference]: Finished difference Result 106 states and 164 transitions. [2023-12-02 16:59:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:59:39,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-02 16:59:39,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:39,675 INFO L225 Difference]: With dead ends: 106 [2023-12-02 16:59:39,675 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 16:59:39,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:59:39,682 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 13 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:39,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 287 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 16:59:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2023-12-02 16:59:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-02 16:59:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2023-12-02 16:59:39,721 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 26 [2023-12-02 16:59:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:39,721 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2023-12-02 16:59:39,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:59:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2023-12-02 16:59:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 16:59:39,724 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:39,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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 16:59:39,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:59:39,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:39,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:39,726 INFO L85 PathProgramCache]: Analyzing trace with hash -777538083, now seen corresponding path program 1 times [2023-12-02 16:59:39,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:39,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745358965] [2023-12-02 16:59:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:39,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:59:40,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:40,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745358965] [2023-12-02 16:59:40,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745358965] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:40,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724099088] [2023-12-02 16:59:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:40,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:40,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:40,053 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:40,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:59:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:40,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 16:59:40,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:59:40,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:59:40,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724099088] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:40,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1333977941] [2023-12-02 16:59:40,520 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 16:59:40,521 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:40,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:40,528 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:40,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:40,800 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 32 for LOIs [2023-12-02 16:59:40,915 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-12-02 16:59:40,922 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 47 for LOIs [2023-12-02 16:59:41,136 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:59:42,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '458#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 16:59:42,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:59:42,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:59:42,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 15 [2023-12-02 16:59:42,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389934013] [2023-12-02 16:59:42,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:59:42,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 16:59:42,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:42,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 16:59:42,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:59:42,307 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 16:59:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:42,718 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2023-12-02 16:59:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 16:59:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2023-12-02 16:59:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:42,722 INFO L225 Difference]: With dead ends: 134 [2023-12-02 16:59:42,722 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 16:59:42,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 16:59:42,725 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:42,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 321 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:59:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 16:59:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2023-12-02 16:59:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-12-02 16:59:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2023-12-02 16:59:42,741 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 30 [2023-12-02 16:59:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:42,741 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2023-12-02 16:59:42,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 16:59:42,742 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2023-12-02 16:59:42,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 16:59:42,744 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:42,744 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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 16:59:42,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:59:42,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:42,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:42,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:42,947 INFO L85 PathProgramCache]: Analyzing trace with hash 57893405, now seen corresponding path program 2 times [2023-12-02 16:59:42,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:42,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528301148] [2023-12-02 16:59:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:42,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:59:43,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:43,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528301148] [2023-12-02 16:59:43,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528301148] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:43,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:43,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:59:43,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049988222] [2023-12-02 16:59:43,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:43,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:59:43,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:43,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:59:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:59:43,190 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:59:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:43,311 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2023-12-02 16:59:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:59:43,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-12-02 16:59:43,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:43,314 INFO L225 Difference]: With dead ends: 98 [2023-12-02 16:59:43,314 INFO L226 Difference]: Without dead ends: 77 [2023-12-02 16:59:43,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:59:43,316 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:43,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 290 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-02 16:59:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2023-12-02 16:59:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-12-02 16:59:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2023-12-02 16:59:43,327 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 30 [2023-12-02 16:59:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:43,328 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2023-12-02 16:59:43,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:59:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2023-12-02 16:59:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 16:59:43,330 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:43,330 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:43,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:59:43,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:43,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1257706030, now seen corresponding path program 1 times [2023-12-02 16:59:43,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:43,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785050611] [2023-12-02 16:59:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:43,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:59:43,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:43,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785050611] [2023-12-02 16:59:43,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785050611] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:43,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:43,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 16:59:43,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412032343] [2023-12-02 16:59:43,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:43,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 16:59:43,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:43,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 16:59:43,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:59:43,949 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 16:59:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:44,310 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2023-12-02 16:59:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 16:59:44,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2023-12-02 16:59:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:44,313 INFO L225 Difference]: With dead ends: 83 [2023-12-02 16:59:44,313 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 16:59:44,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-12-02 16:59:44,315 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:44,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 658 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:59:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 16:59:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2023-12-02 16:59:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 40 states have internal predecessors, (49), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-12-02 16:59:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2023-12-02 16:59:44,324 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 35 [2023-12-02 16:59:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:44,324 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2023-12-02 16:59:44,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 16:59:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2023-12-02 16:59:44,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 16:59:44,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:44,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:44,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:59:44,327 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:44,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:44,327 INFO L85 PathProgramCache]: Analyzing trace with hash -792151056, now seen corresponding path program 3 times [2023-12-02 16:59:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:44,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650482682] [2023-12-02 16:59:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:44,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 16:59:47,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:47,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650482682] [2023-12-02 16:59:47,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650482682] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:47,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:47,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 16:59:47,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25900515] [2023-12-02 16:59:47,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:47,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 16:59:47,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 16:59:47,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:59:47,881 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:59:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:48,240 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2023-12-02 16:59:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 16:59:48,241 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-12-02 16:59:48,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:48,243 INFO L225 Difference]: With dead ends: 75 [2023-12-02 16:59:48,243 INFO L226 Difference]: Without dead ends: 73 [2023-12-02 16:59:48,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:59:48,245 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:48,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 182 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:59:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-02 16:59:48,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2023-12-02 16:59:48,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 43 states have internal predecessors, (52), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-12-02 16:59:48,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2023-12-02 16:59:48,259 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 34 [2023-12-02 16:59:48,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:48,259 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2023-12-02 16:59:48,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:59:48,260 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2023-12-02 16:59:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:59:48,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:48,262 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 16:59:48,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:59:48,262 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:48,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:48,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1393926111, now seen corresponding path program 1 times [2023-12-02 16:59:48,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:48,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356530859] [2023-12-02 16:59:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:48,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:59:48,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356530859] [2023-12-02 16:59:48,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356530859] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:48,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180344258] [2023-12-02 16:59:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:48,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:48,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:48,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:59:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:48,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-02 16:59:49,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:59:49,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 16:59:51,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180344258] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:59:51,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:59:51,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [18, 17] total 37 [2023-12-02 16:59:51,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629960093] [2023-12-02 16:59:51,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:51,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 16:59:51,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:59:51,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 16:59:51,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 16:59:51,304 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 14 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:59:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:51,934 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2023-12-02 16:59:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:59:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-12-02 16:59:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:51,936 INFO L225 Difference]: With dead ends: 73 [2023-12-02 16:59:51,936 INFO L226 Difference]: Without dead ends: 65 [2023-12-02 16:59:51,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=128, Invalid=1594, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 16:59:51,938 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:51,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 485 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:59:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-02 16:59:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2023-12-02 16:59:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.255813953488372) internal successors, (54), 46 states have internal predecessors, (54), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-02 16:59:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2023-12-02 16:59:51,951 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 39 [2023-12-02 16:59:51,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:51,952 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2023-12-02 16:59:51,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:59:51,952 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2023-12-02 16:59:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 16:59:51,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:51,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 16:59:51,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:59:52,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:52,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:52,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:52,156 INFO L85 PathProgramCache]: Analyzing trace with hash 442716961, now seen corresponding path program 1 times [2023-12-02 16:59:52,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:52,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662842566] [2023-12-02 16:59:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:52,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:59:52,366 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:59:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:59:52,584 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 16:59:52,585 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:59:52,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 16:59:52,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 16:59:52,591 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2023-12-02 16:59:52,595 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 16:59:52,614 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret20 could not be translated [2023-12-02 16:59:52,615 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 16:59:52,616 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated [2023-12-02 16:59:52,618 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet9 could not be translated [2023-12-02 16:59:52,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:59:52 BoogieIcfgContainer [2023-12-02 16:59:52,629 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 16:59:52,630 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 16:59:52,630 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 16:59:52,630 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 16:59:52,630 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:59:38" (3/4) ... [2023-12-02 16:59:52,632 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 16:59:52,633 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 16:59:52,634 INFO L158 Benchmark]: Toolchain (without parser) took 14865.94ms. Allocated memory was 144.7MB in the beginning and 335.5MB in the end (delta: 190.8MB). Free memory was 105.8MB in the beginning and 294.1MB in the end (delta: -188.3MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. [2023-12-02 16:59:52,634 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory is still 51.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:59:52,634 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.87ms. Allocated memory is still 144.7MB. Free memory was 105.4MB in the beginning and 92.0MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 16:59:52,635 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.66ms. Allocated memory is still 144.7MB. Free memory was 92.0MB in the beginning and 90.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:59:52,635 INFO L158 Benchmark]: Boogie Preprocessor took 25.76ms. Allocated memory is still 144.7MB. Free memory was 90.7MB in the beginning and 89.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:59:52,635 INFO L158 Benchmark]: RCFGBuilder took 648.25ms. Allocated memory was 144.7MB in the beginning and 190.8MB in the end (delta: 46.1MB). Free memory was 89.0MB in the beginning and 147.7MB in the end (delta: -58.7MB). Peak memory consumption was 26.8MB. Max. memory is 16.1GB. [2023-12-02 16:59:52,636 INFO L158 Benchmark]: TraceAbstraction took 13883.76ms. Allocated memory was 190.8MB in the beginning and 335.5MB in the end (delta: 144.7MB). Free memory was 146.7MB in the beginning and 294.1MB in the end (delta: -147.4MB). Peak memory consumption was 189.1MB. Max. memory is 16.1GB. [2023-12-02 16:59:52,636 INFO L158 Benchmark]: Witness Printer took 3.49ms. Allocated memory is still 335.5MB. Free memory is still 294.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:59:52,638 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 98.6MB. Free memory is still 51.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.87ms. Allocated memory is still 144.7MB. Free memory was 105.4MB in the beginning and 92.0MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.66ms. Allocated memory is still 144.7MB. Free memory was 92.0MB in the beginning and 90.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.76ms. Allocated memory is still 144.7MB. Free memory was 90.7MB in the beginning and 89.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 648.25ms. Allocated memory was 144.7MB in the beginning and 190.8MB in the end (delta: 46.1MB). Free memory was 89.0MB in the beginning and 147.7MB in the end (delta: -58.7MB). Peak memory consumption was 26.8MB. Max. memory is 16.1GB. * TraceAbstraction took 13883.76ms. Allocated memory was 190.8MB in the beginning and 335.5MB in the end (delta: 144.7MB). Free memory was 146.7MB in the beginning and 294.1MB in the end (delta: -147.4MB). Peak memory consumption was 189.1MB. Max. memory is 16.1GB. * Witness Printer took 3.49ms. Allocated memory is still 335.5MB. Free memory is still 294.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret20 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet9 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 111, overapproximation of shiftRight at line 118, overapproximation of bitwiseAnd at line 127. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=-127, eb=-126] [L242] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L81] return (__retres4); [L242] RET, EXPR base2flt(0, 0) VAL [ea=-127, eb=-126] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-127, \old(m)=33554431] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=-127, \old(m)=33554431, e=-127, m=33554431] [L30] COND FALSE !(! m) VAL [\old(e)=-127, \old(m)=33554431, e=-127, m=33554431] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-127, \old(m)=33554431, e=-127, m=33554431] [L58] COND TRUE 1 VAL [\old(e)=-127, \old(m)=33554431, e=-127, m=33554431] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-127, \old(m)=33554431, e=-127, m=33554431] [L77] EXPR m & ~ (1U << 24U) [L77] m = m & ~ (1U << 24U) [L78] EXPR m | ((unsigned int )(e + 128) << 24U) [L78] res = m | ((unsigned int )(e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=-127, \old(m)=33554431, __retres4=33554431, e=-127, m=33554431, res=33554431] [L81] return (__retres4); [L243] RET, EXPR base2flt(ma, ea) VAL [ea=-127, eb=-126, ma=33554431, zero=0] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=-126, \old(m)=16777216] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L30] COND FALSE !(! m) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L58] COND TRUE 1 VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L77] EXPR m & ~ (1U << 24U) [L77] m = m & ~ (1U << 24U) [L78] EXPR m | ((unsigned int )(e + 128) << 24U) [L78] res = m | ((unsigned int )(e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=-126, \old(m)=16777216, __retres4=33554432, e=-126, m=0, res=33554432] [L81] return (__retres4); [L244] RET, EXPR base2flt(mb, eb) VAL [a=33554431, ea=-127, eb=-126, ma=33554431, mb=16777216, zero=0] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=33554431, \old(b)=33554432] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; [L95] COND TRUE a < b [L96] tmp = a [L97] a = b [L98] b = tmp VAL [\old(a)=33554431, \old(b)=33554432, a=33554432, b=33554431, tmp=33554431] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 [L111] EXPR ma | (1U << 24U) [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 [L114] EXPR mb | (1U << 24U) [L114] mb = mb | (1U << 24U) [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L115] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=33554431, \old(b)=33554432, a=33554432, b=33554431, ea=-126, eb=-127, ma=16777216, mb=33554431, tmp=33554431] [L116] delta = ea - eb [L117] COND FALSE !(!(delta < sizeof(mb) * 8)) [L118] EXPR mb >> delta [L118] mb = mb >> delta [L120] COND FALSE !(! mb) [L126] ma = ma + mb [L127] ma & (1U << 25U) VAL [\old(a)=33554431, \old(b)=33554432, a=33554432, b=33554431, delta=1, ea=-126, eb=-127, ma=50331646, mb=33554430, tmp=33554431] [L127] COND FALSE !(ma & (1U << 25U)) [L140] CALL __VERIFIER_assert(ma < 1U << 25U) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.8s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 169 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 139 mSDsluCounter, 2223 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1995 mSDsCounter, 32 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1316 IncrementalHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32 mSolverCounterUnsat, 228 mSDtfsCounter, 1316 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 145 SyntacticMatches, 6 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=2, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 58 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 305 NumberOfCodeBlocks, 305 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 322 ConstructedInterpolants, 0 QuantifiedInterpolants, 1929 SizeOfPredicates, 26 NumberOfNonLiveVariables, 245 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 115/140 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-02 16:59:52,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:59:54,614 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:59:54,694 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 16:59:54,700 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:59:54,701 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:59:54,730 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:59:54,731 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:59:54,731 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:59:54,732 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:59:54,733 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:59:54,733 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:59:54,734 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:59:54,734 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:59:54,735 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:59:54,736 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:59:54,736 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:59:54,737 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:59:54,738 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:59:54,738 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:59:54,739 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:59:54,739 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:59:54,740 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:59:54,741 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:59:54,741 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:59:54,742 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 16:59:54,742 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 16:59:54,742 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 16:59:54,743 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:59:54,743 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:59:54,744 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:59:54,744 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:59:54,745 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 16:59:54,745 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:59:54,745 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:59:54,745 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:59:54,746 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:59:54,746 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:59:54,746 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:59:54,746 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 16:59:54,747 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 16:59:54,747 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:59:54,747 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:59:54,747 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:59:54,748 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:59:54,748 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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2023-12-02 16:59:55,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:59:55,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:59:55,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:59:55,090 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:59:55,091 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:59:55,092 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-12-02 16:59:57,859 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:59:58,069 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:59:58,069 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2023-12-02 16:59:58,079 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/data/45c902aa5/39c03b727af84dd284294e40989dc44f/FLAG5e650022d [2023-12-02 16:59:58,094 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/data/45c902aa5/39c03b727af84dd284294e40989dc44f [2023-12-02 16:59:58,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:59:58,098 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:59:58,100 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:59:58,100 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:59:58,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:59:58,106 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12eaf446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58, skipping insertion in model container [2023-12-02 16:59:58,108 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,141 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:59:58,295 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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-12-02 16:59:58,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:59:58,356 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:59:58,369 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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2023-12-02 16:59:58,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:59:58,412 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:59:58,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58 WrapperNode [2023-12-02 16:59:58,413 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:59:58,414 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:59:58,414 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:59:58,415 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:59:58,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,434 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,453 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2023-12-02 16:59:58,454 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:59:58,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:59:58,455 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:59:58,455 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:59:58,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,469 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,478 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,483 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,486 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,487 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,491 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:59:58,492 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:59:58,492 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:59:58,492 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:59:58,493 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (1/1) ... [2023-12-02 16:59:58,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:59:58,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:58,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:59:58,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:59:58,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:59:58,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 16:59:58,560 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-02 16:59:58,560 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-02 16:59:58,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:59:58,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:59:58,560 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-12-02 16:59:58,561 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-12-02 16:59:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 16:59:58,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 16:59:58,643 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:59:58,646 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:59:58,873 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:59:58,903 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:59:58,903 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 16:59:58,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:59:58 BoogieIcfgContainer [2023-12-02 16:59:58,904 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:59:58,908 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:59:58,908 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:59:58,911 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:59:58,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:59:58" (1/3) ... [2023-12-02 16:59:58,912 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ca3d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:59:58, skipping insertion in model container [2023-12-02 16:59:58,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:59:58" (2/3) ... [2023-12-02 16:59:58,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ca3d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:59:58, skipping insertion in model container [2023-12-02 16:59:58,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:59:58" (3/3) ... [2023-12-02 16:59:58,915 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2023-12-02 16:59:58,935 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:59:58,935 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:59:58,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:59:58,994 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;@70adfe76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:59:58,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:59:58,999 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 16:59:59,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 16:59:59,008 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:59,009 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:59:59,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:59,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:59,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1974951318, now seen corresponding path program 1 times [2023-12-02 16:59:59,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:59:59,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103188896] [2023-12-02 16:59:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:59,042 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 16:59:59,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:59:59,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 16:59:59,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 16:59:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:59,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:59:59,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:59:59,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:59:59,262 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:59:59,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103188896] [2023-12-02 16:59:59,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103188896] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:59:59,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:59:59,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:59:59,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274762851] [2023-12-02 16:59:59,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:59:59,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:59:59,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:59:59,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:59:59,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:59:59,306 INFO L87 Difference]: Start difference. First operand has 49 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:59:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:59,457 INFO L93 Difference]: Finished difference Result 115 states and 181 transitions. [2023-12-02 16:59:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:59:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-12-02 16:59:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:59,469 INFO L225 Difference]: With dead ends: 115 [2023-12-02 16:59:59,469 INFO L226 Difference]: Without dead ends: 65 [2023-12-02 16:59:59,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:59:59,477 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:59,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 393 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:59:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-02 16:59:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2023-12-02 16:59:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 43 states have internal predecessors, (55), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2023-12-02 16:59:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2023-12-02 16:59:59,522 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 27 [2023-12-02 16:59:59,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:59,523 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2023-12-02 16:59:59,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:59:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2023-12-02 16:59:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 16:59:59,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:59,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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 16:59:59,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 16:59:59,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 16:59:59,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:59,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:59,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1701845995, now seen corresponding path program 1 times [2023-12-02 16:59:59,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:59:59,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856161912] [2023-12-02 16:59:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:59,731 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 16:59:59,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:59:59,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 16:59:59,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 16:59:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:59,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:59:59,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:59:59,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:59:59,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:59:59,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856161912] [2023-12-02 16:59:59,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856161912] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:59,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [575160442] [2023-12-02 16:59:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:59,941 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:59:59,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:59:59,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:59:59,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-12-02 17:00:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:00,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:00:00,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:00:00,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:00:00,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [575160442] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:00,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782791742] [2023-12-02 17:00:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:00,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:00,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:00,136 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:00,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:00:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:00,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:00:00,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:00:00,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:00:00,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782791742] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:00,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:00:00,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2023-12-02 17:00:00,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914652071] [2023-12-02 17:00:00,308 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:00,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:00:00,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:00,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:00:00,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:00:00,311 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:00:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:00,458 INFO L93 Difference]: Finished difference Result 111 states and 149 transitions. [2023-12-02 17:00:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:00:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-12-02 17:00:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:00,461 INFO L225 Difference]: With dead ends: 111 [2023-12-02 17:00:00,461 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 17:00:00,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-12-02 17:00:00,464 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 21 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:00,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 439 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 17:00:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2023-12-02 17:00:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 49 states have internal predecessors, (62), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-02 17:00:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2023-12-02 17:00:00,479 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 31 [2023-12-02 17:00:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:00,480 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2023-12-02 17:00:00,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:00:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2023-12-02 17:00:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 17:00:00,482 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:00,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 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 17:00:00,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Ended with exit code 0 [2023-12-02 17:00:00,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2023-12-02 17:00:00,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:00:01,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:01,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:01,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2061916751, now seen corresponding path program 1 times [2023-12-02 17:00:01,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:01,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73517994] [2023-12-02 17:00:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:01,085 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 17:00:01,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:01,086 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:01,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:01,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:00:01,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:00:01,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:00:01,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:01,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73517994] [2023-12-02 17:00:01,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73517994] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:01,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [14586290] [2023-12-02 17:00:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:01,262 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:01,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:01,263 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:01,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-12-02 17:00:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:01,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:00:01,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:00:01,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:00:01,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [14586290] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:01,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:01,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 12 [2023-12-02 17:00:01,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871580020] [2023-12-02 17:00:01,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:01,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:00:01,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:01,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:00:01,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:00:01,402 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:00:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:01,554 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2023-12-02 17:00:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:00:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-12-02 17:00:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:01,557 INFO L225 Difference]: With dead ends: 104 [2023-12-02 17:00:01,557 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 17:00:01,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:00:01,559 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:01,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 449 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 17:00:01,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2023-12-02 17:00:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 54 states have internal predecessors, (68), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-12-02 17:00:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2023-12-02 17:00:01,572 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 34 [2023-12-02 17:00:01,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:01,573 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2023-12-02 17:00:01,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:00:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2023-12-02 17:00:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 17:00:01,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:01,576 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:00:01,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2023-12-02 17:00:01,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:01,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:01,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:01,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:01,979 INFO L85 PathProgramCache]: Analyzing trace with hash 922216448, now seen corresponding path program 2 times [2023-12-02 17:00:01,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:01,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796543402] [2023-12-02 17:00:01,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:01,979 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 17:00:01,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:01,981 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:01,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:02,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 17:00:02,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:02,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:00:02,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:00:02,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:00:02,136 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:02,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796543402] [2023-12-02 17:00:02,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796543402] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:02,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:00:02,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:00:02,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645842851] [2023-12-02 17:00:02,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:02,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:00:02,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:02,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:00:02,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:00:02,154 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 17:00:03,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:03,590 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2023-12-02 17:00:03,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:00:03,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-12-02 17:00:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:03,593 INFO L225 Difference]: With dead ends: 98 [2023-12-02 17:00:03,593 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 17:00:03,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:00:03,595 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 28 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:03,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 283 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 17:00:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 17:00:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2023-12-02 17:00:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 59 states have internal predecessors, (73), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2023-12-02 17:00:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2023-12-02 17:00:03,609 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 35 [2023-12-02 17:00:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:03,609 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2023-12-02 17:00:03,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 17:00:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2023-12-02 17:00:03,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 17:00:03,612 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:03,612 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:00:03,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:03,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:03,813 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:03,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:03,813 INFO L85 PathProgramCache]: Analyzing trace with hash 979474750, now seen corresponding path program 1 times [2023-12-02 17:00:03,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:03,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573324103] [2023-12-02 17:00:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:03,814 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 17:00:03,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:03,815 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:03,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:03,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:00:03,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:00:03,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:00:03,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:03,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573324103] [2023-12-02 17:00:03,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573324103] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:03,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:00:03,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:00:03,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138848336] [2023-12-02 17:00:03,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:03,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:00:03,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:03,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:00:03,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:00:03,952 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 17:00:06,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:00:06,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:06,215 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2023-12-02 17:00:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:00:06,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-12-02 17:00:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:06,218 INFO L225 Difference]: With dead ends: 88 [2023-12-02 17:00:06,218 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 17:00:06,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:00:06,219 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 28 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:06,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 262 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 17:00:06,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 17:00:06,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2023-12-02 17:00:06,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-12-02 17:00:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2023-12-02 17:00:06,232 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 35 [2023-12-02 17:00:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:06,233 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2023-12-02 17:00:06,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 17:00:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2023-12-02 17:00:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 17:00:06,235 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:06,235 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 17:00:06,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:06,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:06,436 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:06,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:06,436 INFO L85 PathProgramCache]: Analyzing trace with hash 932580585, now seen corresponding path program 1 times [2023-12-02 17:00:06,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:06,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301290162] [2023-12-02 17:00:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:06,437 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 17:00:06,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:06,438 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:06,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:06,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:00:06,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:00:06,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:00:06,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301290162] [2023-12-02 17:00:06,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301290162] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1239954454] [2023-12-02 17:00:06,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:06,639 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:06,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:06,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:06,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2023-12-02 17:00:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:06,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:00:06,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:00:06,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:00:06,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1239954454] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:06,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45843499] [2023-12-02 17:00:06,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:06,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:06,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:06,834 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:06,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 17:00:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:06,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:00:06,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:00:06,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:00:07,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45843499] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:07,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:00:07,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2023-12-02 17:00:07,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067754410] [2023-12-02 17:00:07,029 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:07,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:00:07,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:07,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:00:07,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:00:07,031 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:00:07,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:07,200 INFO L93 Difference]: Finished difference Result 118 states and 157 transitions. [2023-12-02 17:00:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:00:07,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-12-02 17:00:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:07,203 INFO L225 Difference]: With dead ends: 118 [2023-12-02 17:00:07,203 INFO L226 Difference]: Without dead ends: 107 [2023-12-02 17:00:07,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:00:07,205 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 43 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:07,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 437 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:07,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-02 17:00:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 88. [2023-12-02 17:00:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 66 states have internal predecessors, (79), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2023-12-02 17:00:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2023-12-02 17:00:07,226 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 38 [2023-12-02 17:00:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:07,227 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2023-12-02 17:00:07,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:00:07,227 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2023-12-02 17:00:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 17:00:07,229 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:07,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 17:00:07,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:07,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 17:00:07,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:07,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:07,833 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:07,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:07,833 INFO L85 PathProgramCache]: Analyzing trace with hash 539553575, now seen corresponding path program 1 times [2023-12-02 17:00:07,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:07,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325866146] [2023-12-02 17:00:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:07,834 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 17:00:07,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:07,835 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:07,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:07,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 17:00:07,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:00:07,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:00:07,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:07,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325866146] [2023-12-02 17:00:07,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325866146] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:07,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:00:07,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 17:00:07,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812626519] [2023-12-02 17:00:07,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:07,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:00:07,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:07,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:00:07,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:00:07,984 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:00:08,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:08,215 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2023-12-02 17:00:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:00:08,216 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-12-02 17:00:08,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:08,218 INFO L225 Difference]: With dead ends: 121 [2023-12-02 17:00:08,218 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 17:00:08,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:00:08,219 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 31 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:08,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 503 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:00:08,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 17:00:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2023-12-02 17:00:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 64 states have (on average 1.265625) internal successors, (81), 67 states have internal predecessors, (81), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2023-12-02 17:00:08,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2023-12-02 17:00:08,236 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 38 [2023-12-02 17:00:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:08,237 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2023-12-02 17:00:08,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:00:08,237 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2023-12-02 17:00:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 17:00:08,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:08,239 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 17:00:08,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:08,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:08,443 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:08,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1568323699, now seen corresponding path program 1 times [2023-12-02 17:00:08,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:08,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540425653] [2023-12-02 17:00:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:08,444 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 17:00:08,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:08,445 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:08,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:08,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 17:00:08,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:00:08,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:00:08,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:08,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540425653] [2023-12-02 17:00:08,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540425653] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:08,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [838969489] [2023-12-02 17:00:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:08,748 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:08,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:08,749 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:08,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-12-02 17:00:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:08,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:00:08,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:08,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:09,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [838969489] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:09,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190973052] [2023-12-02 17:00:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:09,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:09,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:09,106 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:09,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 17:00:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:09,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 17:00:09,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:00:09,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:00:09,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190973052] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:09,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:00:09,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 21 [2023-12-02 17:00:09,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740027961] [2023-12-02 17:00:09,289 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:09,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 17:00:09,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:09,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 17:00:09,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-12-02 17:00:09,290 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand has 21 states, 16 states have (on average 2.5) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 17:00:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:09,827 INFO L93 Difference]: Finished difference Result 162 states and 214 transitions. [2023-12-02 17:00:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 17:00:09,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.5) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 40 [2023-12-02 17:00:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:09,830 INFO L225 Difference]: With dead ends: 162 [2023-12-02 17:00:09,830 INFO L226 Difference]: Without dead ends: 135 [2023-12-02 17:00:09,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:00:09,832 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:09,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 739 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:00:09,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-02 17:00:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2023-12-02 17:00:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 83 states have internal predecessors, (100), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 19 states have call predecessors, (29), 17 states have call successors, (29) [2023-12-02 17:00:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2023-12-02 17:00:09,849 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 40 [2023-12-02 17:00:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:09,849 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2023-12-02 17:00:09,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.5) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 17:00:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2023-12-02 17:00:09,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 17:00:09,851 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:09,851 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 17:00:09,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 17:00:10,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Ended with exit code 0 [2023-12-02 17:00:10,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:10,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:10,455 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:10,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1511065397, now seen corresponding path program 1 times [2023-12-02 17:00:10,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:10,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960314838] [2023-12-02 17:00:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:10,456 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 17:00:10,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:10,456 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:10,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:10,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:00:10,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:10,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:00:10,516 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:10,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960314838] [2023-12-02 17:00:10,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960314838] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:10,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:00:10,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:00:10,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105792793] [2023-12-02 17:00:10,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:10,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:00:10,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:00:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:00:10,519 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 17:00:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:10,591 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2023-12-02 17:00:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:00:10,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2023-12-02 17:00:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:10,594 INFO L225 Difference]: With dead ends: 120 [2023-12-02 17:00:10,594 INFO L226 Difference]: Without dead ends: 100 [2023-12-02 17:00:10,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:00:10,595 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:10,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 284 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-02 17:00:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-12-02 17:00:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 75 states have internal predecessors, (88), 16 states have call successors, (16), 8 states have call predecessors, (16), 11 states have return successors, (25), 16 states have call predecessors, (25), 15 states have call successors, (25) [2023-12-02 17:00:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2023-12-02 17:00:10,607 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 40 [2023-12-02 17:00:10,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:10,607 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2023-12-02 17:00:10,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 17:00:10,607 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2023-12-02 17:00:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 17:00:10,608 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:10,609 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 17:00:10,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:10,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:10,809 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:10,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:10,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1965766502, now seen corresponding path program 1 times [2023-12-02 17:00:10,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:10,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50830812] [2023-12-02 17:00:10,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:10,810 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 17:00:10,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:10,811 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:10,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:10,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:00:10,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:10,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:11,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:11,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50830812] [2023-12-02 17:00:11,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50830812] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:11,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2070892707] [2023-12-02 17:00:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:11,388 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:11,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:11,389 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:11,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-12-02 17:00:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:11,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:00:11,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:11,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:11,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2070892707] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:11,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502764124] [2023-12-02 17:00:11,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:11,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:11,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:11,593 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:11,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 17:00:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:11,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:00:11,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:11,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:11,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502764124] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:11,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:00:11,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2023-12-02 17:00:11,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787842895] [2023-12-02 17:00:11,814 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:11,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:00:11,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:00:11,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2023-12-02 17:00:11,816 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand has 24 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 17:00:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:12,861 INFO L93 Difference]: Finished difference Result 142 states and 199 transitions. [2023-12-02 17:00:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:00:12,862 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 42 [2023-12-02 17:00:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:12,864 INFO L225 Difference]: With dead ends: 142 [2023-12-02 17:00:12,864 INFO L226 Difference]: Without dead ends: 110 [2023-12-02 17:00:12,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 17:00:12,866 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 121 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:12,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1111 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:00:12,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-02 17:00:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2023-12-02 17:00:12,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 68 states have internal predecessors, (78), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2023-12-02 17:00:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2023-12-02 17:00:12,879 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 42 [2023-12-02 17:00:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:12,879 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2023-12-02 17:00:12,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 17:00:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2023-12-02 17:00:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 17:00:12,881 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:12,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 17:00:12,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 17:00:13,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:13,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:13,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:13,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:13,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:13,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1432935070, now seen corresponding path program 2 times [2023-12-02 17:00:13,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:13,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242467385] [2023-12-02 17:00:13,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:13,483 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 17:00:13,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:13,484 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:13,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (21)] Waiting until timeout for monitored process [2023-12-02 17:00:13,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:13,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:13,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:00:13,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:13,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:14,131 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242467385] [2023-12-02 17:00:14,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242467385] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:14,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1050322776] [2023-12-02 17:00:14,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:14,132 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:14,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:14,133 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:14,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-12-02 17:00:14,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:14,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:14,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:00:14,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:14,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:14,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1050322776] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:14,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452945326] [2023-12-02 17:00:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:14,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:14,328 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:14,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 17:00:14,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:14,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:14,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:00:14,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:14,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 17:00:14,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452945326] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:14,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:00:14,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2023-12-02 17:00:14,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061178438] [2023-12-02 17:00:14,556 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:14,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:00:14,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:14,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:00:14,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2023-12-02 17:00:14,558 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand has 24 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 17:00:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:15,581 INFO L93 Difference]: Finished difference Result 125 states and 174 transitions. [2023-12-02 17:00:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:00:15,581 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 42 [2023-12-02 17:00:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:15,583 INFO L225 Difference]: With dead ends: 125 [2023-12-02 17:00:15,583 INFO L226 Difference]: Without dead ends: 100 [2023-12-02 17:00:15,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:00:15,585 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 145 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:15,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1077 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:00:15,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-02 17:00:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2023-12-02 17:00:15,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 58 states have internal predecessors, (68), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2023-12-02 17:00:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 108 transitions. [2023-12-02 17:00:15,595 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 108 transitions. Word has length 42 [2023-12-02 17:00:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:15,595 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 108 transitions. [2023-12-02 17:00:15,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 17:00:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 108 transitions. [2023-12-02 17:00:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 17:00:15,597 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:15,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 17:00:15,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (21)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:15,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:16,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:16,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:16,198 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:16,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:16,198 INFO L85 PathProgramCache]: Analyzing trace with hash -114915456, now seen corresponding path program 1 times [2023-12-02 17:00:16,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:16,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578696769] [2023-12-02 17:00:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:16,199 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 17:00:16,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:16,199 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:16,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:16,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:16,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:00:17,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:00:17,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:17,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578696769] [2023-12-02 17:00:17,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578696769] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:17,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:00:17,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:00:17,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102865788] [2023-12-02 17:00:17,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:17,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:00:17,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:17,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:00:17,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:00:17,514 INFO L87 Difference]: Start difference. First operand 75 states and 108 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:00:19,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:00:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:19,795 INFO L93 Difference]: Finished difference Result 85 states and 121 transitions. [2023-12-02 17:00:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:00:19,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2023-12-02 17:00:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:19,796 INFO L225 Difference]: With dead ends: 85 [2023-12-02 17:00:19,796 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 17:00:19,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:00:19,797 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 10 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:19,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 307 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 17:00:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 17:00:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2023-12-02 17:00:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 62 states have internal predecessors, (71), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2023-12-02 17:00:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 113 transitions. [2023-12-02 17:00:19,806 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 113 transitions. Word has length 45 [2023-12-02 17:00:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:19,806 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 113 transitions. [2023-12-02 17:00:19,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:00:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 113 transitions. [2023-12-02 17:00:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 17:00:19,807 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:19,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 17:00:19,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Ended with exit code 0 [2023-12-02 17:00:20,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:20,008 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:20,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:20,008 INFO L85 PathProgramCache]: Analyzing trace with hash 501526360, now seen corresponding path program 1 times [2023-12-02 17:00:20,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:20,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740359395] [2023-12-02 17:00:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:20,009 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 17:00:20,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:20,010 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:20,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (25)] Waiting until timeout for monitored process [2023-12-02 17:00:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:20,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:20,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:00:22,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:00:22,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:22,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740359395] [2023-12-02 17:00:22,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740359395] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:22,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:00:22,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:00:22,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123534303] [2023-12-02 17:00:22,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:22,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:00:22,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:22,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:00:22,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:00:22,338 INFO L87 Difference]: Start difference. First operand 80 states and 113 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:00:24,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:00:26,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:00:28,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:00:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:28,565 INFO L93 Difference]: Finished difference Result 89 states and 124 transitions. [2023-12-02 17:00:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:00:28,566 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2023-12-02 17:00:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:28,567 INFO L225 Difference]: With dead ends: 89 [2023-12-02 17:00:28,567 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 17:00:28,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:00:28,568 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:28,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 262 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2023-12-02 17:00:28,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 17:00:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2023-12-02 17:00:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 59 states have internal predecessors, (69), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2023-12-02 17:00:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2023-12-02 17:00:28,575 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 46 [2023-12-02 17:00:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:28,576 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2023-12-02 17:00:28,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:00:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2023-12-02 17:00:28,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 17:00:28,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:28,577 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 17:00:28,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (25)] Ended with exit code 0 [2023-12-02 17:00:28,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:28,778 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:28,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1094043785, now seen corresponding path program 1 times [2023-12-02 17:00:28,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:28,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963826949] [2023-12-02 17:00:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:28,779 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 17:00:28,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:28,780 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:28,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:28,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:28,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:28,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:28,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:28,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963826949] [2023-12-02 17:00:28,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963826949] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:28,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1560266891] [2023-12-02 17:00:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:28,971 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:28,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:28,972 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:28,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-12-02 17:00:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:29,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:00:29,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:00:29,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:00:29,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1560266891] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:00:29,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:29,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2023-12-02 17:00:29,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628812999] [2023-12-02 17:00:29,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:00:29,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:00:29,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:00:29,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:00:29,107 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:00:29,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:29,198 INFO L93 Difference]: Finished difference Result 107 states and 165 transitions. [2023-12-02 17:00:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:00:29,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2023-12-02 17:00:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:29,199 INFO L225 Difference]: With dead ends: 107 [2023-12-02 17:00:29,200 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 17:00:29,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:00:29,200 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 30 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:29,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 255 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 17:00:29,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2023-12-02 17:00:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 68 states have internal predecessors, (78), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (44), 15 states have call predecessors, (44), 14 states have call successors, (44) [2023-12-02 17:00:29,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 137 transitions. [2023-12-02 17:00:29,208 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 137 transitions. Word has length 48 [2023-12-02 17:00:29,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:29,208 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 137 transitions. [2023-12-02 17:00:29,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 17:00:29,208 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 137 transitions. [2023-12-02 17:00:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 17:00:29,209 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:29,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 17:00:29,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Ended with exit code 0 [2023-12-02 17:00:29,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:29,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:29,610 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:29,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:29,610 INFO L85 PathProgramCache]: Analyzing trace with hash -605566757, now seen corresponding path program 1 times [2023-12-02 17:00:29,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:29,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116966411] [2023-12-02 17:00:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:29,611 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 17:00:29,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:29,611 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:29,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:29,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:29,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:29,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:29,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:29,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116966411] [2023-12-02 17:00:29,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116966411] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:29,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [453668125] [2023-12-02 17:00:29,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:29,830 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:29,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:29,831 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:29,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2023-12-02 17:00:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:29,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:29,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:29,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:29,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [453668125] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:29,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831004387] [2023-12-02 17:00:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:29,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:29,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:29,991 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:29,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 17:00:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:30,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:30,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:30,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:30,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831004387] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:30,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:00:30,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2023-12-02 17:00:30,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598702695] [2023-12-02 17:00:30,147 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:30,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:00:30,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:30,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:00:30,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:00:30,149 INFO L87 Difference]: Start difference. First operand 89 states and 137 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 17:00:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:30,331 INFO L93 Difference]: Finished difference Result 102 states and 154 transitions. [2023-12-02 17:00:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:00:30,332 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2023-12-02 17:00:30,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:30,333 INFO L225 Difference]: With dead ends: 102 [2023-12-02 17:00:30,333 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 17:00:30,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:00:30,334 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 78 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:30,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 422 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:30,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 17:00:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-12-02 17:00:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.253968253968254) internal successors, (79), 70 states have internal predecessors, (79), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (46), 15 states have call predecessors, (46), 14 states have call successors, (46) [2023-12-02 17:00:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 140 transitions. [2023-12-02 17:00:30,344 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 140 transitions. Word has length 57 [2023-12-02 17:00:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:30,344 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 140 transitions. [2023-12-02 17:00:30,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 17:00:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 140 transitions. [2023-12-02 17:00:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 17:00:30,345 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:30,345 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 17:00:30,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:30,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:30,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 17:00:30,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:30,946 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:30,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:30,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1537741673, now seen corresponding path program 2 times [2023-12-02 17:00:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:30,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162396545] [2023-12-02 17:00:30,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:30,947 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 17:00:30,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:30,948 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:30,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (31)] Waiting until timeout for monitored process [2023-12-02 17:00:30,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:30,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:30,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:30,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:31,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:31,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:31,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162396545] [2023-12-02 17:00:31,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162396545] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:31,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1356597723] [2023-12-02 17:00:31,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:31,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:31,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:31,167 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:31,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2023-12-02 17:00:31,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:31,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:31,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:00:31,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:31,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:31,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1356597723] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:31,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048765642] [2023-12-02 17:00:31,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:31,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:31,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:31,385 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:31,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 17:00:31,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:31,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:31,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:31,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:31,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:31,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048765642] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:31,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:00:31,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2023-12-02 17:00:31,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021240315] [2023-12-02 17:00:31,552 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:31,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:00:31,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:31,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:00:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:00:31,553 INFO L87 Difference]: Start difference. First operand 91 states and 140 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 17:00:31,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:31,738 INFO L93 Difference]: Finished difference Result 104 states and 158 transitions. [2023-12-02 17:00:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:00:31,739 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2023-12-02 17:00:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:31,740 INFO L225 Difference]: With dead ends: 104 [2023-12-02 17:00:31,740 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 17:00:31,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:00:31,742 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 84 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:31,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 387 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:31,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 17:00:31,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-12-02 17:00:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.253968253968254) internal successors, (79), 70 states have internal predecessors, (79), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (45), 15 states have call predecessors, (45), 14 states have call successors, (45) [2023-12-02 17:00:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 139 transitions. [2023-12-02 17:00:31,767 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 139 transitions. Word has length 57 [2023-12-02 17:00:31,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:31,767 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 139 transitions. [2023-12-02 17:00:31,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 17:00:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 139 transitions. [2023-12-02 17:00:31,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 17:00:31,768 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:31,768 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 17:00:31,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 17:00:31,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (31)] Ended with exit code 0 [2023-12-02 17:00:32,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2023-12-02 17:00:32,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:32,369 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:32,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:32,370 INFO L85 PathProgramCache]: Analyzing trace with hash -244994597, now seen corresponding path program 1 times [2023-12-02 17:00:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:32,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632428936] [2023-12-02 17:00:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:32,370 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 17:00:32,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:32,371 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:32,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:32,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:32,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:32,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:32,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:32,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632428936] [2023-12-02 17:00:32,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632428936] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:32,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1510345936] [2023-12-02 17:00:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:32,575 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:32,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:32,576 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:32,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2023-12-02 17:00:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:32,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:32,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:32,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:32,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1510345936] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:32,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207988378] [2023-12-02 17:00:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:32,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:32,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:32,742 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:32,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 17:00:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:32,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:32,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:32,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:32,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207988378] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:32,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:00:32,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2023-12-02 17:00:32,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066991892] [2023-12-02 17:00:32,902 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:32,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:00:32,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:32,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:00:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:00:32,903 INFO L87 Difference]: Start difference. First operand 91 states and 139 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 17:00:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:33,097 INFO L93 Difference]: Finished difference Result 102 states and 150 transitions. [2023-12-02 17:00:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:00:33,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2023-12-02 17:00:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:33,099 INFO L225 Difference]: With dead ends: 102 [2023-12-02 17:00:33,099 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 17:00:33,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:00:33,100 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 71 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:33,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 422 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 17:00:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-12-02 17:00:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 68 states have internal predecessors, (77), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (41), 15 states have call predecessors, (41), 14 states have call successors, (41) [2023-12-02 17:00:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 133 transitions. [2023-12-02 17:00:33,111 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 133 transitions. Word has length 59 [2023-12-02 17:00:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:33,112 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 133 transitions. [2023-12-02 17:00:33,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 17:00:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 133 transitions. [2023-12-02 17:00:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 17:00:33,113 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:33,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-12-02 17:00:33,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2023-12-02 17:00:33,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:33,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:33,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:33,715 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:33,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:33,715 INFO L85 PathProgramCache]: Analyzing trace with hash -480527781, now seen corresponding path program 2 times [2023-12-02 17:00:33,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:33,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326496162] [2023-12-02 17:00:33,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:33,716 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 17:00:33,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:33,717 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:33,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (37)] Waiting until timeout for monitored process [2023-12-02 17:00:33,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:33,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:33,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:33,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:33,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:33,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:33,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326496162] [2023-12-02 17:00:33,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326496162] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:33,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1605187200] [2023-12-02 17:00:33,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:33,941 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:33,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:33,942 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:33,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2023-12-02 17:00:34,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:34,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:34,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:34,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:34,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:34,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1605187200] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:34,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795148137] [2023-12-02 17:00:34,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:34,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:34,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:34,128 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:34,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 17:00:34,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:34,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:34,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:00:34,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:34,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:00:34,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795148137] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:34,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:00:34,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2023-12-02 17:00:34,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878395666] [2023-12-02 17:00:34,301 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:34,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:00:34,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:34,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:00:34,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:00:34,302 INFO L87 Difference]: Start difference. First operand 89 states and 133 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 17:00:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:34,479 INFO L93 Difference]: Finished difference Result 100 states and 144 transitions. [2023-12-02 17:00:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:00:34,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2023-12-02 17:00:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:34,481 INFO L225 Difference]: With dead ends: 100 [2023-12-02 17:00:34,481 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 17:00:34,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:00:34,482 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 76 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:34,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 457 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 17:00:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-12-02 17:00:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 66 states have internal predecessors, (75), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (39), 15 states have call predecessors, (39), 14 states have call successors, (39) [2023-12-02 17:00:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 129 transitions. [2023-12-02 17:00:34,490 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 129 transitions. Word has length 59 [2023-12-02 17:00:34,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:34,490 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 129 transitions. [2023-12-02 17:00:34,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 17:00:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 129 transitions. [2023-12-02 17:00:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 17:00:34,492 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:34,492 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 17:00:34,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (37)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:34,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2023-12-02 17:00:34,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:35,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:35,093 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:35,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:35,093 INFO L85 PathProgramCache]: Analyzing trace with hash 934238064, now seen corresponding path program 1 times [2023-12-02 17:00:35,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:35,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924083403] [2023-12-02 17:00:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:35,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:00:35,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:35,095 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:35,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:35,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:00:35,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:00:35,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:00:37,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:37,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924083403] [2023-12-02 17:00:37,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924083403] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:37,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [986940413] [2023-12-02 17:00:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:37,951 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:37,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:37,951 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:37,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2023-12-02 17:00:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:38,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:00:38,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:00:38,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:00:39,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [986940413] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827530415] [2023-12-02 17:00:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:39,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:39,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:39,325 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:39,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-02 17:00:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:39,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:00:39,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:00:39,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:00:40,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827530415] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:40,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:00:40,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16, 16, 15, 16] total 30 [2023-12-02 17:00:40,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526012469] [2023-12-02 17:00:40,392 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:40,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 17:00:40,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 17:00:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:00:40,394 INFO L87 Difference]: Start difference. First operand 87 states and 129 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-02 17:00:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:44,845 INFO L93 Difference]: Finished difference Result 148 states and 213 transitions. [2023-12-02 17:00:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 17:00:44,847 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 66 [2023-12-02 17:00:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:44,848 INFO L225 Difference]: With dead ends: 148 [2023-12-02 17:00:44,848 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 17:00:44,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=527, Invalid=2443, Unknown=0, NotChecked=0, Total=2970 [2023-12-02 17:00:44,850 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 197 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:44,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 788 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 17:00:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 17:00:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2023-12-02 17:00:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 78 states have internal predecessors, (88), 18 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (51), 18 states have call predecessors, (51), 17 states have call successors, (51) [2023-12-02 17:00:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 157 transitions. [2023-12-02 17:00:44,861 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 157 transitions. Word has length 66 [2023-12-02 17:00:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:44,862 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 157 transitions. [2023-12-02 17:00:44,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-02 17:00:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 157 transitions. [2023-12-02 17:00:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 17:00:44,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:44,863 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 17:00:44,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2023-12-02 17:00:45,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-02 17:00:45,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:45,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:45,464 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:45,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1171067760, now seen corresponding path program 2 times [2023-12-02 17:00:45,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:45,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932798583] [2023-12-02 17:00:45,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:45,465 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 17:00:45,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:45,465 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:45,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Waiting until timeout for monitored process [2023-12-02 17:00:45,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:45,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:45,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:00:45,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:00:46,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:00:48,236 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:48,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932798583] [2023-12-02 17:00:48,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932798583] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:48,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1972489052] [2023-12-02 17:00:48,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:48,236 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:48,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:48,237 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:48,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2023-12-02 17:00:48,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:48,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:48,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:00:48,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:00:48,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:00:49,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1972489052] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:49,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350399322] [2023-12-02 17:00:49,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:00:49,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:49,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:49,337 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:49,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-02 17:00:49,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:00:49,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:00:49,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:00:49,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:00:49,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:00:50,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350399322] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:50,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:00:50,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2023-12-02 17:00:50,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586390049] [2023-12-02 17:00:50,415 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:50,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:00:50,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:00:50,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:00:50,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:00:50,417 INFO L87 Difference]: Start difference. First operand 103 states and 157 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-02 17:00:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:55,342 INFO L93 Difference]: Finished difference Result 166 states and 238 transitions. [2023-12-02 17:00:55,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 17:00:55,343 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 66 [2023-12-02 17:00:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:55,344 INFO L225 Difference]: With dead ends: 166 [2023-12-02 17:00:55,344 INFO L226 Difference]: Without dead ends: 131 [2023-12-02 17:00:55,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=484, Invalid=2168, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 17:00:55,346 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 218 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:55,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 850 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 17:00:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-02 17:00:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2023-12-02 17:00:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 89 states have internal predecessors, (100), 20 states have call successors, (20), 7 states have call predecessors, (20), 12 states have return successors, (53), 20 states have call predecessors, (53), 19 states have call successors, (53) [2023-12-02 17:00:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 173 transitions. [2023-12-02 17:00:55,366 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 173 transitions. Word has length 66 [2023-12-02 17:00:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:55,366 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 173 transitions. [2023-12-02 17:00:55,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-02 17:00:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 173 transitions. [2023-12-02 17:00:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 17:00:55,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:55,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 17:00:55,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2023-12-02 17:00:55,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Forceful destruction successful, exit code 0 [2023-12-02 17:00:55,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-12-02 17:00:55,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:55,969 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:55,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:55,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1436034838, now seen corresponding path program 1 times [2023-12-02 17:00:55,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:00:55,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470338418] [2023-12-02 17:00:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:55,970 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 17:00:55,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:00:55,971 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:55,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:00:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:56,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:00:56,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:00:56,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:00:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:00:59,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:00:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470338418] [2023-12-02 17:00:59,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470338418] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:00:59,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [644985950] [2023-12-02 17:00:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:59,056 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:00:59,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:00:59,057 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:00:59,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2023-12-02 17:00:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:00:59,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:00:59,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:00:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:00:59,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:01:00,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [644985950] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:00,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273982901] [2023-12-02 17:01:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:00,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:00,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:00,152 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:00,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 17:01:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:00,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:01:00,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:01:00,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:01:01,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273982901] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:01,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:01:01,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2023-12-02 17:01:01,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27631165] [2023-12-02 17:01:01,203 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:01,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:01:01,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:01:01,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:01:01,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:01:01,204 INFO L87 Difference]: Start difference. First operand 117 states and 173 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-02 17:01:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:04,518 INFO L93 Difference]: Finished difference Result 148 states and 208 transitions. [2023-12-02 17:01:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 17:01:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 68 [2023-12-02 17:01:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:04,520 INFO L225 Difference]: With dead ends: 148 [2023-12-02 17:01:04,521 INFO L226 Difference]: Without dead ends: 129 [2023-12-02 17:01:04,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=381, Invalid=1511, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 17:01:04,522 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 122 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:04,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 1056 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 17:01:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-02 17:01:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 119. [2023-12-02 17:01:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 86 states have (on average 1.186046511627907) internal successors, (102), 90 states have internal predecessors, (102), 20 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (48), 20 states have call predecessors, (48), 19 states have call successors, (48) [2023-12-02 17:01:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 170 transitions. [2023-12-02 17:01:04,544 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 170 transitions. Word has length 68 [2023-12-02 17:01:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:04,544 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 170 transitions. [2023-12-02 17:01:04,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-02 17:01:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 170 transitions. [2023-12-02 17:01:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 17:01:04,546 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:04,546 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2023-12-02 17:01:04,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 17:01:04,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:01:04,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2023-12-02 17:01:05,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:01:05,147 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:05,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1789962251, now seen corresponding path program 1 times [2023-12-02 17:01:05,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:01:05,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765285038] [2023-12-02 17:01:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:05,148 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 17:01:05,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:01:05,148 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:01:05,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:01:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:05,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:01:05,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:01:05,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:01:05,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:01:05,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765285038] [2023-12-02 17:01:05,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765285038] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:01:05,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:01:05,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:01:05,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461621139] [2023-12-02 17:01:05,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:01:05,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:01:05,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:01:05,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:01:05,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:01:05,270 INFO L87 Difference]: Start difference. First operand 119 states and 170 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:01:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:05,361 INFO L93 Difference]: Finished difference Result 133 states and 185 transitions. [2023-12-02 17:01:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:01:05,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2023-12-02 17:01:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:05,363 INFO L225 Difference]: With dead ends: 133 [2023-12-02 17:01:05,363 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 17:01:05,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:01:05,364 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 6 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:05,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 433 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:01:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 17:01:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2023-12-02 17:01:05,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 86 states have (on average 1.186046511627907) internal successors, (102), 90 states have internal predecessors, (102), 20 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) [2023-12-02 17:01:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 167 transitions. [2023-12-02 17:01:05,378 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 167 transitions. Word has length 68 [2023-12-02 17:01:05,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:05,379 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 167 transitions. [2023-12-02 17:01:05,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:01:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 167 transitions. [2023-12-02 17:01:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 17:01:05,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:05,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 17:01:05,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:01:05,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:01:05,580 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:05,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:05,581 INFO L85 PathProgramCache]: Analyzing trace with hash -832034154, now seen corresponding path program 2 times [2023-12-02 17:01:05,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:01:05,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353663651] [2023-12-02 17:01:05,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:01:05,581 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 17:01:05,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:01:05,582 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:01:05,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (50)] Waiting until timeout for monitored process [2023-12-02 17:01:05,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:01:05,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:01:05,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:01:05,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:01:06,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:01:08,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:01:08,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353663651] [2023-12-02 17:01:08,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353663651] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:08,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [882043661] [2023-12-02 17:01:08,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:01:08,507 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:01:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:01:08,508 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:01:08,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2023-12-02 17:01:08,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:01:08,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:01:08,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:01:08,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:01:08,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:01:09,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [882043661] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:09,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939732462] [2023-12-02 17:01:09,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:01:09,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:09,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:09,585 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:09,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 17:01:09,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:01:09,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:01:09,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:01:09,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:01:09,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:01:10,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939732462] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:10,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:01:10,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2023-12-02 17:01:10,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232241833] [2023-12-02 17:01:10,725 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:10,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:01:10,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:01:10,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:01:10,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:01:10,727 INFO L87 Difference]: Start difference. First operand 119 states and 167 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-02 17:01:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:14,078 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2023-12-02 17:01:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:01:14,079 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 68 [2023-12-02 17:01:14,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:14,080 INFO L225 Difference]: With dead ends: 150 [2023-12-02 17:01:14,080 INFO L226 Difference]: Without dead ends: 137 [2023-12-02 17:01:14,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 17:01:14,082 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 129 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:14,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 880 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 17:01:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-02 17:01:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 127. [2023-12-02 17:01:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 96 states have internal predecessors, (110), 21 states have call successors, (21), 9 states have call predecessors, (21), 12 states have return successors, (43), 21 states have call predecessors, (43), 20 states have call successors, (43) [2023-12-02 17:01:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2023-12-02 17:01:14,111 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 68 [2023-12-02 17:01:14,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:14,112 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2023-12-02 17:01:14,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-02 17:01:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2023-12-02 17:01:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:01:14,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:14,114 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2023-12-02 17:01:14,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (50)] Ended with exit code 0 [2023-12-02 17:01:14,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-12-02 17:01:14,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2023-12-02 17:01:14,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:01:14,718 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:14,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:14,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1337945379, now seen corresponding path program 1 times [2023-12-02 17:01:14,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:01:14,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599004208] [2023-12-02 17:01:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:14,719 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 17:01:14,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:01:14,720 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:01:14,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (53)] Waiting until timeout for monitored process [2023-12-02 17:01:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:14,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:01:14,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:01:15,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:01:17,082 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:01:17,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599004208] [2023-12-02 17:01:17,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599004208] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:17,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1661320966] [2023-12-02 17:01:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:17,083 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:01:17,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:01:17,084 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:01:17,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2023-12-02 17:01:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:17,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:01:17,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:01:17,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:01:17,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1661320966] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:17,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473250092] [2023-12-02 17:01:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:17,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:17,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:17,966 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:17,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-02 17:01:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:18,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 17:01:18,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:01:18,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 17:01:20,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473250092] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:20,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:01:20,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 15, 18, 19] total 39 [2023-12-02 17:01:20,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434900307] [2023-12-02 17:01:20,429 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:20,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-02 17:01:20,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:01:20,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-02 17:01:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:01:20,431 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 39 states, 37 states have (on average 2.0) internal successors, (74), 39 states have internal predecessors, (74), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2023-12-02 17:01:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:01:25,430 INFO L93 Difference]: Finished difference Result 147 states and 195 transitions. [2023-12-02 17:01:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 17:01:25,431 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.0) internal successors, (74), 39 states have internal predecessors, (74), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) Word has length 72 [2023-12-02 17:01:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:01:25,432 INFO L225 Difference]: With dead ends: 147 [2023-12-02 17:01:25,432 INFO L226 Difference]: Without dead ends: 120 [2023-12-02 17:01:25,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=530, Invalid=3010, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 17:01:25,434 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 169 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:01:25,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 835 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 17:01:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-02 17:01:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2023-12-02 17:01:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 82 states have (on average 1.170731707317073) internal successors, (96), 85 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 11 states have return successors, (37), 19 states have call predecessors, (37), 18 states have call successors, (37) [2023-12-02 17:01:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 152 transitions. [2023-12-02 17:01:25,447 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 152 transitions. Word has length 72 [2023-12-02 17:01:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:01:25,448 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 152 transitions. [2023-12-02 17:01:25,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.0) internal successors, (74), 39 states have internal predecessors, (74), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2023-12-02 17:01:25,448 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 152 transitions. [2023-12-02 17:01:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 17:01:25,449 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:01:25,449 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2023-12-02 17:01:25,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (53)] Ended with exit code 0 [2023-12-02 17:01:25,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-12-02 17:01:25,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2023-12-02 17:01:26,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:01:26,050 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:01:26,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:01:26,050 INFO L85 PathProgramCache]: Analyzing trace with hash -333974070, now seen corresponding path program 1 times [2023-12-02 17:01:26,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:01:26,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581545284] [2023-12-02 17:01:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:26,051 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 17:01:26,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:01:26,051 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:01:26,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Waiting until timeout for monitored process [2023-12-02 17:01:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:26,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 17:01:26,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:01:28,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:01:37,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:01:37,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581545284] [2023-12-02 17:01:37,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581545284] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:37,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1410243949] [2023-12-02 17:01:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:37,862 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:01:37,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:01:37,863 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:01:37,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2023-12-02 17:01:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:38,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:01:38,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:01:40,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:01:47,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1410243949] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:47,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677786150] [2023-12-02 17:01:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:01:47,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:01:47,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:01:47,172 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:01:47,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-12-02 17:01:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:01:47,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 17:01:47,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:01:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:01:48,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:01:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 17:01:53,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677786150] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:01:53,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:01:53,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 18, 18, 24, 26] total 73 [2023-12-02 17:01:53,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720111976] [2023-12-02 17:01:53,623 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:01:53,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-12-02 17:01:53,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:01:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-12-02 17:01:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=4629, Unknown=0, NotChecked=0, Total=5256 [2023-12-02 17:01:53,627 INFO L87 Difference]: Start difference. First operand 113 states and 152 transitions. Second operand has 73 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 70 states have internal predecessors, (106), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 17:02:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:02:19,406 INFO L93 Difference]: Finished difference Result 146 states and 191 transitions. [2023-12-02 17:02:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 17:02:19,408 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 70 states have internal predecessors, (106), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) Word has length 75 [2023-12-02 17:02:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:02:19,409 INFO L225 Difference]: With dead ends: 146 [2023-12-02 17:02:19,409 INFO L226 Difference]: Without dead ends: 133 [2023-12-02 17:02:19,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 371 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=1319, Invalid=8781, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 17:02:19,412 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 191 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 2046 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:02:19,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 1665 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2046 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-12-02 17:02:19,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-02 17:02:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 117. [2023-12-02 17:02:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 87 states have internal predecessors, (99), 20 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (36), 21 states have call predecessors, (36), 19 states have call successors, (36) [2023-12-02 17:02:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 155 transitions. [2023-12-02 17:02:19,427 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 155 transitions. Word has length 75 [2023-12-02 17:02:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:02:19,427 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 155 transitions. [2023-12-02 17:02:19,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 70 states have internal predecessors, (106), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 17:02:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 155 transitions. [2023-12-02 17:02:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:02:19,428 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:02:19,428 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2023-12-02 17:02:19,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Ended with exit code 0 [2023-12-02 17:02:19,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-12-02 17:02:19,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2023-12-02 17:02:20,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:02:20,029 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:02:20,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:02:20,030 INFO L85 PathProgramCache]: Analyzing trace with hash 136400605, now seen corresponding path program 2 times [2023-12-02 17:02:20,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:02:20,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477002256] [2023-12-02 17:02:20,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:02:20,030 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 17:02:20,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:02:20,031 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:02:20,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (59)] Waiting until timeout for monitored process [2023-12-02 17:02:20,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:02:20,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:02:20,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:02:20,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:02:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:02:20,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:02:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:02:22,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:02:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477002256] [2023-12-02 17:02:22,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477002256] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:02:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [372114354] [2023-12-02 17:02:22,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:02:22,434 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:02:22,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:02:22,435 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:02:22,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2023-12-02 17:02:22,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:02:22,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:02:22,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:02:22,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:02:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:02:22,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:02:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:02:23,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [372114354] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:02:23,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830743739] [2023-12-02 17:02:23,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:02:23,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:02:23,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:02:23,391 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:02:23,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-12-02 17:02:23,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:02:23,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:02:23,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:02:23,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:02:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:02:23,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:02:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:02:24,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830743739] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:02:24,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:02:24,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 15, 14, 15] total 26 [2023-12-02 17:02:24,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150011697] [2023-12-02 17:02:24,327 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:02:24,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 17:02:24,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:02:24,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 17:02:24,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:02:24,330 INFO L87 Difference]: Start difference. First operand 117 states and 155 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-02 17:02:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:02:27,361 INFO L93 Difference]: Finished difference Result 130 states and 168 transitions. [2023-12-02 17:02:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:02:27,363 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 72 [2023-12-02 17:02:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:02:27,364 INFO L225 Difference]: With dead ends: 130 [2023-12-02 17:02:27,364 INFO L226 Difference]: Without dead ends: 103 [2023-12-02 17:02:27,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 17:02:27,365 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 166 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:02:27,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 664 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 17:02:27,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-02 17:02:27,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2023-12-02 17:02:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 70 states have internal predecessors, (79), 17 states have call successors, (17), 6 states have call predecessors, (17), 10 states have return successors, (32), 18 states have call predecessors, (32), 16 states have call successors, (32) [2023-12-02 17:02:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2023-12-02 17:02:27,379 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 72 [2023-12-02 17:02:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:02:27,379 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2023-12-02 17:02:27,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-02 17:02:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2023-12-02 17:02:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 17:02:27,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:02:27,380 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2023-12-02 17:02:27,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (59)] Forceful destruction successful, exit code 0 [2023-12-02 17:02:27,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-12-02 17:02:27,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2023-12-02 17:02:27,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:02:27,981 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:02:27,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:02:27,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2103771722, now seen corresponding path program 2 times [2023-12-02 17:02:27,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:02:27,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897325399] [2023-12-02 17:02:27,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:02:27,982 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 17:02:27,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:02:27,983 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:02:27,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Waiting until timeout for monitored process [2023-12-02 17:02:28,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:02:28,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:02:28,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 17:02:28,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:02:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:02:30,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:02:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:02:39,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:02:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897325399] [2023-12-02 17:02:39,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897325399] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:02:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1183866735] [2023-12-02 17:02:39,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:02:39,675 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:02:39,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:02:39,676 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:02:39,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2023-12-02 17:02:39,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:02:39,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:02:39,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:02:39,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:02:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:02:41,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:02:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:02:48,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1183866735] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:02:48,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555055194] [2023-12-02 17:02:48,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:02:48,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:02:48,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:02:48,942 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:02:48,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-12-02 17:02:49,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:02:49,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:02:49,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 17:02:49,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:02:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:02:49,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:02:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:02:51,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555055194] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:02:51,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:02:51,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 18, 18, 22, 24] total 66 [2023-12-02 17:02:51,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059714316] [2023-12-02 17:02:51,525 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:02:51,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-12-02 17:02:51,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:02:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-12-02 17:02:51,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=3727, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 17:02:51,529 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand has 66 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 63 states have internal predecessors, (95), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-02 17:03:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:03:12,332 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2023-12-02 17:03:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-02 17:03:12,334 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 63 states have internal predecessors, (95), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) Word has length 75 [2023-12-02 17:03:12,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:03:12,335 INFO L225 Difference]: With dead ends: 142 [2023-12-02 17:03:12,335 INFO L226 Difference]: Without dead ends: 122 [2023-12-02 17:03:12,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=1323, Invalid=7797, Unknown=0, NotChecked=0, Total=9120 [2023-12-02 17:03:12,338 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 248 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:03:12,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1487 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-12-02 17:03:12,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-02 17:03:12,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 104. [2023-12-02 17:03:12,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 77 states have internal predecessors, (88), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (31), 19 states have call predecessors, (31), 17 states have call successors, (31) [2023-12-02 17:03:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2023-12-02 17:03:12,361 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 75 [2023-12-02 17:03:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:03:12,361 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 137 transitions. [2023-12-02 17:03:12,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 63 states have internal predecessors, (95), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-02 17:03:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 137 transitions. [2023-12-02 17:03:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:03:12,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:03:12,363 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2023-12-02 17:03:12,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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)] Ended with exit code 0 [2023-12-02 17:03:12,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2023-12-02 17:03:12,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-12-02 17:03:12,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:03:12,964 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:03:12,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:03:12,964 INFO L85 PathProgramCache]: Analyzing trace with hash -883430198, now seen corresponding path program 1 times [2023-12-02 17:03:12,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:03:12,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059200918] [2023-12-02 17:03:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:12,965 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 17:03:12,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:03:12,966 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:03:12,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (65)] Waiting until timeout for monitored process [2023-12-02 17:03:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:13,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 17:03:13,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:03:15,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:03:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:03:21,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:03:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059200918] [2023-12-02 17:03:21,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059200918] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:03:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [382630354] [2023-12-02 17:03:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:21,710 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:03:21,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:03:21,711 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:03:21,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2023-12-02 17:03:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:21,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 17:03:21,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:03:22,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:03:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:03:23,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [382630354] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:03:23,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452677512] [2023-12-02 17:03:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:23,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:03:23,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:03:23,857 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:03:23,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-12-02 17:03:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:24,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 17:03:24,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:03:24,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:03:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:03:27,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452677512] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:03:27,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:03:27,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22, 23, 22, 24] total 48 [2023-12-02 17:03:27,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785035014] [2023-12-02 17:03:27,539 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:03:27,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 17:03:27,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:03:27,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 17:03:27,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:03:27,540 INFO L87 Difference]: Start difference. First operand 104 states and 137 transitions. Second operand has 48 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 45 states have internal predecessors, (70), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-02 17:03:45,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:03:45,460 INFO L93 Difference]: Finished difference Result 144 states and 184 transitions. [2023-12-02 17:03:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-02 17:03:45,461 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 45 states have internal predecessors, (70), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) Word has length 73 [2023-12-02 17:03:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:03:45,462 INFO L225 Difference]: With dead ends: 144 [2023-12-02 17:03:45,462 INFO L226 Difference]: Without dead ends: 125 [2023-12-02 17:03:45,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=865, Invalid=7145, Unknown=0, NotChecked=0, Total=8010 [2023-12-02 17:03:45,464 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 168 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:03:45,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 964 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-12-02 17:03:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-02 17:03:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 114. [2023-12-02 17:03:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 85 states have internal predecessors, (98), 19 states have call successors, (19), 8 states have call predecessors, (19), 10 states have return successors, (30), 20 states have call predecessors, (30), 18 states have call successors, (30) [2023-12-02 17:03:45,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2023-12-02 17:03:45,492 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 73 [2023-12-02 17:03:45,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:03:45,492 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2023-12-02 17:03:45,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 45 states have internal predecessors, (70), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-02 17:03:45,492 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2023-12-02 17:03:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:03:45,494 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:03:45,494 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2023-12-02 17:03:45,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2023-12-02 17:03:45,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (65)] Ended with exit code 0 [2023-12-02 17:03:45,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-12-02 17:03:46,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:03:46,095 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:03:46,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:03:46,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1349550408, now seen corresponding path program 1 times [2023-12-02 17:03:46,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:03:46,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491917855] [2023-12-02 17:03:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:46,095 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 17:03:46,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:03:46,096 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:03:46,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (68)] Waiting until timeout for monitored process [2023-12-02 17:03:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:46,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:03:46,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:03:46,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:03:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:03:46,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:03:46,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491917855] [2023-12-02 17:03:46,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491917855] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:03:46,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1592008817] [2023-12-02 17:03:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:46,519 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:03:46,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:03:46,520 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:03:46,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2023-12-02 17:03:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:46,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:03:46,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:03:46,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:03:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:03:46,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1592008817] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:03:46,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215450843] [2023-12-02 17:03:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:03:46,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:03:46,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:03:46,843 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:03:46,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-12-02 17:03:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:03:46,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:03:46,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:03:46,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:03:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:03:47,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215450843] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:03:47,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:03:47,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2023-12-02 17:03:47,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334248747] [2023-12-02 17:03:47,105 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:03:47,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 17:03:47,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:03:47,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 17:03:47,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:03:47,107 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 17:03:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:03:47,547 INFO L93 Difference]: Finished difference Result 123 states and 155 transitions. [2023-12-02 17:03:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:03:47,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 76 [2023-12-02 17:03:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:03:47,549 INFO L225 Difference]: With dead ends: 123 [2023-12-02 17:03:47,549 INFO L226 Difference]: Without dead ends: 110 [2023-12-02 17:03:47,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:03:47,550 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 106 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:03:47,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 537 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:03:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-02 17:03:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-12-02 17:03:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 83 states have internal predecessors, (95), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (28), 19 states have call predecessors, (28), 17 states have call successors, (28) [2023-12-02 17:03:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 141 transitions. [2023-12-02 17:03:47,566 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 141 transitions. Word has length 76 [2023-12-02 17:03:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:03:47,566 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 141 transitions. [2023-12-02 17:03:47,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 17:03:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 141 transitions. [2023-12-02 17:03:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:03:47,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:03:47,567 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2023-12-02 17:03:47,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2023-12-02 17:03:47,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-12-02 17:03:47,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (68)] Ended with exit code 0 [2023-12-02 17:03:48,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:03:48,168 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:03:48,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:03:48,169 INFO L85 PathProgramCache]: Analyzing trace with hash 939447430, now seen corresponding path program 2 times [2023-12-02 17:03:48,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:03:48,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031304411] [2023-12-02 17:03:48,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:03:48,169 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 17:03:48,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:03:48,170 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:03:48,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (71)] Waiting until timeout for monitored process [2023-12-02 17:03:48,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:03:48,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:03:48,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:03:48,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:03:49,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:03:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:03:53,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:03:53,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031304411] [2023-12-02 17:03:53,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031304411] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:03:53,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1109577321] [2023-12-02 17:03:53,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:03:53,364 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:03:53,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:03:53,365 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:03:53,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2023-12-02 17:03:53,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:03:53,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:03:53,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 17:03:53,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:03:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:03:55,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:04:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:04:00,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1109577321] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:04:00,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837063302] [2023-12-02 17:04:00,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:04:00,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:04:00,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:04:00,241 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:04:00,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-12-02 17:04:00,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:04:00,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:04:00,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 17:04:00,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:04:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:04:01,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:04:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:04:05,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837063302] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:04:05,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:04:05,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21, 22, 22, 23] total 63 [2023-12-02 17:04:05,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541367040] [2023-12-02 17:04:05,168 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:04:05,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-02 17:04:05,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:04:05,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-02 17:04:05,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=3532, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 17:04:05,170 INFO L87 Difference]: Start difference. First operand 110 states and 141 transitions. Second operand has 63 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 60 states have internal predecessors, (94), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2023-12-02 17:04:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:04:22,338 INFO L93 Difference]: Finished difference Result 151 states and 187 transitions. [2023-12-02 17:04:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-02 17:04:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 60 states have internal predecessors, (94), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) Word has length 73 [2023-12-02 17:04:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:04:22,340 INFO L225 Difference]: With dead ends: 151 [2023-12-02 17:04:22,340 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 17:04:22,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=1316, Invalid=9190, Unknown=0, NotChecked=0, Total=10506 [2023-12-02 17:04:22,343 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 147 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 1921 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:04:22,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1458 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1921 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-12-02 17:04:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 17:04:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2023-12-02 17:04:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 82 states have internal predecessors, (95), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2023-12-02 17:04:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 139 transitions. [2023-12-02 17:04:22,359 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 139 transitions. Word has length 73 [2023-12-02 17:04:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:04:22,360 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 139 transitions. [2023-12-02 17:04:22,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 60 states have internal predecessors, (94), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2023-12-02 17:04:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 139 transitions. [2023-12-02 17:04:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:04:22,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:04:22,360 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2023-12-02 17:04:22,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-12-02 17:04:22,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (72)] Ended with exit code 0 [2023-12-02 17:04:22,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (71)] Ended with exit code 0 [2023-12-02 17:04:22,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:04:22,961 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:04:22,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:04:22,962 INFO L85 PathProgramCache]: Analyzing trace with hash -389741368, now seen corresponding path program 2 times [2023-12-02 17:04:22,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:04:22,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607533006] [2023-12-02 17:04:22,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:04:22,962 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 17:04:22,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:04:22,963 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:04:22,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (74)] Waiting until timeout for monitored process [2023-12-02 17:04:23,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:04:23,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:04:23,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:04:23,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:04:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:04:23,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:04:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:04:23,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:04:23,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607533006] [2023-12-02 17:04:23,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607533006] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:04:23,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1282324831] [2023-12-02 17:04:23,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:04:23,375 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:04:23,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:04:23,376 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:04:23,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2023-12-02 17:04:23,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:04:23,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:04:23,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:04:23,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:04:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:04:23,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:04:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:04:23,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1282324831] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:04:23,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849745623] [2023-12-02 17:04:23,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:04:23,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:04:23,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:04:23,738 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:04:23,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-12-02 17:04:23,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:04:23,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:04:23,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:04:23,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:04:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:04:23,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:04:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:04:24,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849745623] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:04:24,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:04:24,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2023-12-02 17:04:24,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232599257] [2023-12-02 17:04:24,022 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:04:24,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 17:04:24,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:04:24,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 17:04:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:04:24,023 INFO L87 Difference]: Start difference. First operand 110 states and 139 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 17:04:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:04:24,394 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2023-12-02 17:04:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:04:24,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 76 [2023-12-02 17:04:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:04:24,395 INFO L225 Difference]: With dead ends: 117 [2023-12-02 17:04:24,395 INFO L226 Difference]: Without dead ends: 95 [2023-12-02 17:04:24,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:04:24,396 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 94 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:04:24,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 437 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:04:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-02 17:04:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2023-12-02 17:04:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2023-12-02 17:04:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2023-12-02 17:04:24,410 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 76 [2023-12-02 17:04:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:04:24,411 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2023-12-02 17:04:24,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 17:04:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2023-12-02 17:04:24,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 17:04:24,412 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:04:24,412 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 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] [2023-12-02 17:04:24,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2023-12-02 17:04:24,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (74)] Ended with exit code 0 [2023-12-02 17:04:24,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2023-12-02 17:04:25,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:04:25,013 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:04:25,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:04:25,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1640509679, now seen corresponding path program 1 times [2023-12-02 17:04:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:04:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036521921] [2023-12-02 17:04:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:04:25,014 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 17:04:25,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:04:25,015 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:04:25,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (77)] Waiting until timeout for monitored process [2023-12-02 17:04:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:04:25,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 17:04:25,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:04:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:04:28,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:04:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:04:38,654 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:04:38,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036521921] [2023-12-02 17:04:38,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036521921] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:04:38,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1854767637] [2023-12-02 17:04:38,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:04:38,654 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:04:38,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:04:38,655 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:04:38,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2023-12-02 17:04:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:04:39,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 17:04:39,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:04:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:04:39,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:04:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:04:41,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1854767637] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:04:41,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613848704] [2023-12-02 17:04:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:04:41,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:04:41,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:04:41,577 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:04:41,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-12-02 17:04:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:04:42,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-02 17:04:42,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:04:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:04:43,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:04:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:04:48,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613848704] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:04:48,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:04:48,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 26, 25] total 52 [2023-12-02 17:04:48,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917600375] [2023-12-02 17:04:48,692 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:04:48,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-02 17:04:48,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:04:48,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-02 17:04:48,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2405, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 17:04:48,694 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 52 states, 46 states have (on average 1.608695652173913) internal successors, (74), 48 states have internal predecessors, (74), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2023-12-02 17:05:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:05:13,961 INFO L93 Difference]: Finished difference Result 104 states and 126 transitions. [2023-12-02 17:05:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-02 17:05:13,963 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 46 states have (on average 1.608695652173913) internal successors, (74), 48 states have internal predecessors, (74), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 78 [2023-12-02 17:05:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:05:13,964 INFO L225 Difference]: With dead ends: 104 [2023-12-02 17:05:13,964 INFO L226 Difference]: Without dead ends: 97 [2023-12-02 17:05:13,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 410 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=709, Invalid=5770, Unknown=1, NotChecked=0, Total=6480 [2023-12-02 17:05:13,965 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 125 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:05:13,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1173 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2023-12-02 17:05:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-02 17:05:13,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2023-12-02 17:05:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-02 17:05:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2023-12-02 17:05:13,981 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 78 [2023-12-02 17:05:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:05:13,981 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2023-12-02 17:05:13,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 46 states have (on average 1.608695652173913) internal successors, (74), 48 states have internal predecessors, (74), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2023-12-02 17:05:13,981 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2023-12-02 17:05:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 17:05:13,982 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:05:13,982 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 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] [2023-12-02 17:05:13,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (77)] Ended with exit code 0 [2023-12-02 17:05:14,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-12-02 17:05:14,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (78)] Ended with exit code 0 [2023-12-02 17:05:14,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:05:14,583 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:05:14,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:05:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1562951347, now seen corresponding path program 2 times [2023-12-02 17:05:14,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:05:14,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986244809] [2023-12-02 17:05:14,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:05:14,584 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 17:05:14,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:05:14,585 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:05:14,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (80)] Waiting until timeout for monitored process [2023-12-02 17:05:15,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:05:15,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:05:15,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 17:05:15,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:05:17,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:05:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:05:28,298 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:05:28,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986244809] [2023-12-02 17:05:28,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986244809] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:05:28,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531001836] [2023-12-02 17:05:28,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:05:28,298 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:05:28,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:05:28,299 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:05:28,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2023-12-02 17:05:28,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:05:28,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:05:28,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 17:05:28,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:05:29,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:05:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:05:31,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1531001836] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:05:31,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752112808] [2023-12-02 17:05:31,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:05:31,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:05:31,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:05:31,362 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:05:31,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-12-02 17:05:32,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:05:32,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:05:32,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 17:05:32,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:05:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:05:33,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:05:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:05:38,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752112808] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:05:38,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:05:38,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 26, 25] total 52 [2023-12-02 17:05:38,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223191499] [2023-12-02 17:05:38,653 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:05:38,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-02 17:05:38,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:05:38,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-02 17:05:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 17:05:38,655 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand has 52 states, 46 states have (on average 1.608695652173913) internal successors, (74), 48 states have internal predecessors, (74), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2023-12-02 17:06:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:00,184 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2023-12-02 17:06:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 17:06:00,185 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 46 states have (on average 1.608695652173913) internal successors, (74), 48 states have internal predecessors, (74), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 78 [2023-12-02 17:06:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:00,186 INFO L225 Difference]: With dead ends: 101 [2023-12-02 17:06:00,186 INFO L226 Difference]: Without dead ends: 94 [2023-12-02 17:06:00,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=655, Invalid=5507, Unknown=0, NotChecked=0, Total=6162 [2023-12-02 17:06:00,187 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 149 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:00,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1100 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-12-02 17:06:00,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-02 17:06:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2023-12-02 17:06:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 63 states have internal predecessors, (71), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2023-12-02 17:06:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2023-12-02 17:06:00,212 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 78 [2023-12-02 17:06:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:00,213 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2023-12-02 17:06:00,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 46 states have (on average 1.608695652173913) internal successors, (74), 48 states have internal predecessors, (74), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2023-12-02 17:06:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2023-12-02 17:06:00,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 17:06:00,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:00,214 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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] [2023-12-02 17:06:00,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (81)] Ended with exit code 0 [2023-12-02 17:06:00,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2023-12-02 17:06:00,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (80)] Ended with exit code 0 [2023-12-02 17:06:00,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:06:00,815 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:00,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:00,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2136358071, now seen corresponding path program 1 times [2023-12-02 17:06:00,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:06:00,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916494984] [2023-12-02 17:06:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:00,816 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 17:06:00,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:06:00,817 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:06:00,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (83)] Waiting until timeout for monitored process [2023-12-02 17:06:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:01,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:06:01,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:06:01,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:06:05,063 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:06:05,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916494984] [2023-12-02 17:06:05,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916494984] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:05,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1516854445] [2023-12-02 17:06:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:05,063 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:06:05,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:06:05,064 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:06:05,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2023-12-02 17:06:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:05,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:06:05,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:06:05,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:06:06,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1516854445] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:06,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172799937] [2023-12-02 17:06:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:06,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:06,526 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:06,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-12-02 17:06:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:06,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:06:06,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:06:07,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:06:07,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172799937] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:07,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:06:07,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 16, 17, 16] total 30 [2023-12-02 17:06:07,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287758548] [2023-12-02 17:06:07,922 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:06:07,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 17:06:07,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:06:07,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 17:06:07,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:06:07,924 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-02 17:06:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:13,540 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2023-12-02 17:06:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:06:13,541 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 79 [2023-12-02 17:06:13,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:13,542 INFO L225 Difference]: With dead ends: 111 [2023-12-02 17:06:13,542 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 17:06:13,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=461, Invalid=2401, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:06:13,543 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 83 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:13,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 868 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 17:06:13,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 17:06:13,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2023-12-02 17:06:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2023-12-02 17:06:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2023-12-02 17:06:13,556 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 79 [2023-12-02 17:06:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:13,556 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2023-12-02 17:06:13,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-02 17:06:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2023-12-02 17:06:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 17:06:13,557 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:13,557 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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] [2023-12-02 17:06:13,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2023-12-02 17:06:13,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (83)] Ended with exit code 0 [2023-12-02 17:06:13,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (84)] Ended with exit code 0 [2023-12-02 17:06:14,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:06:14,158 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:14,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:14,158 INFO L85 PathProgramCache]: Analyzing trace with hash -267950221, now seen corresponding path program 2 times [2023-12-02 17:06:14,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:06:14,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139578363] [2023-12-02 17:06:14,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:06:14,159 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 17:06:14,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:06:14,160 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:06:14,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (86)] Waiting until timeout for monitored process [2023-12-02 17:06:14,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:06:14,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:06:14,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:06:14,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:06:15,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:06:18,442 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:06:18,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139578363] [2023-12-02 17:06:18,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139578363] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:18,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1194954571] [2023-12-02 17:06:18,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:06:18,442 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:06:18,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:06:18,443 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:06:18,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2023-12-02 17:06:18,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:06:18,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:06:18,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 17:06:18,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:06:19,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:06:20,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1194954571] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:20,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025764052] [2023-12-02 17:06:20,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:06:20,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:20,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:20,928 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:20,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-12-02 17:06:21,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:06:21,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:06:21,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 17:06:21,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:06:21,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:06:22,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025764052] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:22,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:06:22,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 17, 16, 16] total 36 [2023-12-02 17:06:22,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582986964] [2023-12-02 17:06:22,545 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:06:22,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 17:06:22,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:06:22,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 17:06:22,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:06:22,546 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2023-12-02 17:06:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:06:29,419 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2023-12-02 17:06:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 17:06:29,421 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) Word has length 79 [2023-12-02 17:06:29,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:06:29,421 INFO L225 Difference]: With dead ends: 98 [2023-12-02 17:06:29,421 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 17:06:29,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=560, Invalid=3100, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 17:06:29,422 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 72 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:06:29,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 893 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 17:06:29,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 17:06:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-02 17:06:29,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 53 states have internal predecessors, (59), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2023-12-02 17:06:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2023-12-02 17:06:29,443 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 79 [2023-12-02 17:06:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:06:29,443 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2023-12-02 17:06:29,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2023-12-02 17:06:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2023-12-02 17:06:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 17:06:29,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:06:29,445 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 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] [2023-12-02 17:06:29,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-12-02 17:06:29,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (86)] Ended with exit code 0 [2023-12-02 17:06:29,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2023-12-02 17:06:30,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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=3,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:06:30,046 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:06:30,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:06:30,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1062441329, now seen corresponding path program 1 times [2023-12-02 17:06:30,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:06:30,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493244990] [2023-12-02 17:06:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:30,046 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 17:06:30,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:06:30,047 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:06:30,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (89)] Waiting until timeout for monitored process [2023-12-02 17:06:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:30,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 17:06:30,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:06:33,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:06:44,393 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:06:44,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493244990] [2023-12-02 17:06:44,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493244990] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:44,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [664799939] [2023-12-02 17:06:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:44,394 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:06:44,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:06:44,395 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:06:44,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2023-12-02 17:06:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:44,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 17:06:44,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:06:48,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:06:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:06:55,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [664799939] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:06:55,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571720218] [2023-12-02 17:06:55,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:06:55,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:06:55,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:06:55,002 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:06:55,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-12-02 17:06:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:06:55,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 17:06:55,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:06:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:06:57,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:07:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:07:03,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571720218] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:07:03,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:07:03,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26, 25, 28, 28] total 72 [2023-12-02 17:07:03,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304989315] [2023-12-02 17:07:03,668 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:07:03,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-12-02 17:07:03,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:07:03,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-12-02 17:07:03,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=4760, Unknown=0, NotChecked=0, Total=5112 [2023-12-02 17:07:03,671 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 72 states, 63 states have (on average 1.492063492063492) internal successors, (94), 66 states have internal predecessors, (94), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2023-12-02 17:07:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:07:26,352 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2023-12-02 17:07:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 17:07:26,353 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 63 states have (on average 1.492063492063492) internal successors, (94), 66 states have internal predecessors, (94), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) Word has length 80 [2023-12-02 17:07:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:07:26,354 INFO L225 Difference]: With dead ends: 81 [2023-12-02 17:07:26,354 INFO L226 Difference]: Without dead ends: 70 [2023-12-02 17:07:26,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 402 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=843, Invalid=8277, Unknown=0, NotChecked=0, Total=9120 [2023-12-02 17:07:26,355 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 109 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:07:26,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1450 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-12-02 17:07:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-02 17:07:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2023-12-02 17:07:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 53 states have internal predecessors, (60), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-02 17:07:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2023-12-02 17:07:26,366 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 80 [2023-12-02 17:07:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:07:26,366 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2023-12-02 17:07:26,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 63 states have (on average 1.492063492063492) internal successors, (94), 66 states have internal predecessors, (94), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2023-12-02 17:07:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2023-12-02 17:07:26,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 17:07:26,367 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:07:26,367 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 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] [2023-12-02 17:07:26,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (90)] Forceful destruction successful, exit code 0 [2023-12-02 17:07:26,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (89)] Ended with exit code 0 [2023-12-02 17:07:26,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2023-12-02 17:07:26,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:26,968 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:07:26,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:07:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash -719288177, now seen corresponding path program 2 times [2023-12-02 17:07:26,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:07:26,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472007364] [2023-12-02 17:07:26,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:07:26,968 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 17:07:26,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:07:26,969 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 17:07:26,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (92)] Waiting until timeout for monitored process [2023-12-02 17:07:27,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:07:27,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:07:27,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 17:07:27,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:07:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:07:30,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:07:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:07:41,712 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:07:41,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472007364] [2023-12-02 17:07:41,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472007364] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:07:41,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825776898] [2023-12-02 17:07:41,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:07:41,712 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:07:41,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:07:41,713 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:07:41,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2023-12-02 17:07:42,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:07:42,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:07:42,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 17:07:42,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:07:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:07:45,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:07:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:07:51,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [825776898] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:07:51,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103877283] [2023-12-02 17:07:51,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 17:07:51,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:07:51,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:07:51,225 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:07:51,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-12-02 17:07:51,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 17:07:51,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:07:51,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 17:07:51,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:07:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:07:52,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:07:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:07:59,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103877283] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:07:59,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:07:59,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26, 25, 28, 28] total 71 [2023-12-02 17:07:59,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644994838] [2023-12-02 17:07:59,415 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:07:59,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-12-02 17:07:59,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:07:59,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-12-02 17:07:59,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=4624, Unknown=0, NotChecked=0, Total=4970 [2023-12-02 17:07:59,417 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 71 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 65 states have internal predecessors, (94), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2023-12-02 17:08:24,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:08:24,309 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2023-12-02 17:08:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-02 17:08:24,310 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 65 states have internal predecessors, (94), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) Word has length 80 [2023-12-02 17:08:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:08:24,311 INFO L225 Difference]: With dead ends: 69 [2023-12-02 17:08:24,311 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 17:08:24,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=805, Invalid=7751, Unknown=0, NotChecked=0, Total=8556 [2023-12-02 17:08:24,312 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 101 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:08:24,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1251 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-12-02 17:08:24,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 17:08:24,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 17:08:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 17:08:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 17:08:24,313 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2023-12-02 17:08:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:08:24,313 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 17:08:24,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 65 states have internal predecessors, (94), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2023-12-02 17:08:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 17:08:24,314 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 17:08:24,316 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 17:08:24,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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 (92)] Ended with exit code 0 [2023-12-02 17:08:24,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2023-12-02 17:08:24,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2023-12-02 17:08:24,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/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=3,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abbd8a7e-1f5a-4dc4-a953-9cf557868fe3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:08:24,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 17:09:16,324 WARN L293 SmtUtils]: Spent 43.44s on a formula simplification. DAG size of input: 360 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)