./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/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_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/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_5a74e857-8d4d-496e-a1a2-0fcee11e1088/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 2e33738ed6ea5e50e5f6c45ef52d667e94a1539d08a631ee5964d7b99a8f5c91 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:21:40,631 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:21:40,692 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:21:40,697 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:21:40,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:21:40,720 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:21:40,721 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:21:40,721 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:21:40,722 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:21:40,722 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:21:40,723 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:21:40,724 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:21:40,724 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:21:40,725 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:21:40,725 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:21:40,726 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:21:40,726 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:21:40,727 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:21:40,727 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:21:40,728 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:21:40,728 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:21:40,729 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:21:40,730 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:21:40,730 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:21:40,731 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:21:40,731 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:21:40,731 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:21:40,732 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:21:40,732 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:21:40,733 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:21:40,733 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:21:40,733 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:21:40,734 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:21:40,734 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:21:40,734 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:21:40,734 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:21:40,735 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:21:40,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:21:40,735 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:21:40,735 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:21:40,735 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:21:40,736 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:21:40,736 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:21:40,736 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:21:40,736 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:21:40,736 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:21:40,737 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:21:40,737 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_5a74e857-8d4d-496e-a1a2-0fcee11e1088/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e33738ed6ea5e50e5f6c45ef52d667e94a1539d08a631ee5964d7b99a8f5c91 [2023-12-02 13:21:40,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:21:40,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:21:40,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:21:40,973 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:21:40,973 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:21:40,974 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:21:43,732 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:21:43,940 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:21:43,940 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:21:43,952 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/data/5187d0e36/5df1bb6cf5244f07bf1db4a8ecd45e50/FLAGf0dcb0df3 [2023-12-02 13:21:43,967 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/data/5187d0e36/5df1bb6cf5244f07bf1db4a8ecd45e50 [2023-12-02 13:21:43,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:21:43,971 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:21:43,972 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:21:43,972 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:21:43,977 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:21:43,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:21:43" (1/1) ... [2023-12-02 13:21:43,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f2ac768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:43, skipping insertion in model container [2023-12-02 13:21:43,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:21:43" (1/1) ... [2023-12-02 13:21:44,033 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:21:44,308 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_5a74e857-8d4d-496e-a1a2-0fcee11e1088/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c[28368,28381] [2023-12-02 13:21:44,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:21:44,326 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:21:44,408 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_5a74e857-8d4d-496e-a1a2-0fcee11e1088/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c[28368,28381] [2023-12-02 13:21:44,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:21:44,427 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:21:44,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44 WrapperNode [2023-12-02 13:21:44,427 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:21:44,428 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:21:44,428 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:21:44,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:21:44,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (1/1) ... [2023-12-02 13:21:44,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (1/1) ... [2023-12-02 13:21:44,484 INFO L138 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 943 [2023-12-02 13:21:44,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:21:44,486 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:21:44,486 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:21:44,486 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:21:44,495 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (1/1) ... [2023-12-02 13:21:44,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (1/1) ... [2023-12-02 13:21:44,500 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (1/1) ... [2023-12-02 13:21:44,501 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (1/1) ... [2023-12-02 13:21:44,519 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (1/1) ... [2023-12-02 13:21:44,533 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (1/1) ... [2023-12-02 13:21:44,537 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (1/1) ... [2023-12-02 13:21:44,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (1/1) ... [2023-12-02 13:21:44,551 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:21:44,552 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:21:44,553 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:21:44,553 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:21:44,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (1/1) ... [2023-12-02 13:21:44,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:21:44,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:21:44,588 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:21:44,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:21:44,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:21:44,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:21:44,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:21:44,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:21:44,760 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:21:44,762 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:21:45,533 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:21:46,431 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:21:46,431 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 13:21:46,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:21:46 BoogieIcfgContainer [2023-12-02 13:21:46,433 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:21:46,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:21:46,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:21:46,439 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:21:46,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:21:43" (1/3) ... [2023-12-02 13:21:46,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d528a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:21:46, skipping insertion in model container [2023-12-02 13:21:46,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:21:44" (2/3) ... [2023-12-02 13:21:46,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d528a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:21:46, skipping insertion in model container [2023-12-02 13:21:46,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:21:46" (3/3) ... [2023-12-02 13:21:46,442 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:21:46,461 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:21:46,461 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:21:46,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:21:46,517 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;@27dbc4af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:21:46,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:21:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 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 13:21:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 13:21:46,533 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:46,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:21:46,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:46,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:46,539 INFO L85 PathProgramCache]: Analyzing trace with hash 284663584, now seen corresponding path program 1 times [2023-12-02 13:21:46,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:46,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540110947] [2023-12-02 13:21:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:46,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:49,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:21:49,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540110947] [2023-12-02 13:21:49,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540110947] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:21:49,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:21:49,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:21:49,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136316969] [2023-12-02 13:21:49,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:21:49,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:21:49,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:21:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:21:49,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:49,480 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 13:21:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:21:49,716 INFO L93 Difference]: Finished difference Result 177 states and 288 transitions. [2023-12-02 13:21:49,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:21:49,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-12-02 13:21:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:21:49,728 INFO L225 Difference]: With dead ends: 177 [2023-12-02 13:21:49,728 INFO L226 Difference]: Without dead ends: 158 [2023-12-02 13:21:49,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:49,733 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 26 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:21:49,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 372 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:21:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-12-02 13:21:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2023-12-02 13:21:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 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 13:21:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2023-12-02 13:21:49,777 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2023-12-02 13:21:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:21:49,778 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2023-12-02 13:21:49,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 13:21:49,779 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2023-12-02 13:21:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 13:21:49,782 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:49,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:21:49,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:21:49,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:49,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:49,783 INFO L85 PathProgramCache]: Analyzing trace with hash 166432831, now seen corresponding path program 1 times [2023-12-02 13:21:49,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:49,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577631409] [2023-12-02 13:21:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:51,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:21:51,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577631409] [2023-12-02 13:21:51,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577631409] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:21:51,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:21:51,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:21:51,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407777071] [2023-12-02 13:21:51,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:21:51,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:21:51,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:21:51,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:21:51,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:51,910 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 13:21:52,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:21:52,123 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2023-12-02 13:21:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:21:52,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 13:21:52,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:21:52,126 INFO L225 Difference]: With dead ends: 180 [2023-12-02 13:21:52,126 INFO L226 Difference]: Without dead ends: 160 [2023-12-02 13:21:52,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:52,128 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 24 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:21:52,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:21:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-02 13:21:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-12-02 13:21:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 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 13:21:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2023-12-02 13:21:52,143 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2023-12-02 13:21:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:21:52,143 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2023-12-02 13:21:52,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 13:21:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2023-12-02 13:21:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 13:21:52,147 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:52,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:21:52,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:21:52,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:52,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:52,148 INFO L85 PathProgramCache]: Analyzing trace with hash 801698537, now seen corresponding path program 1 times [2023-12-02 13:21:52,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:52,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371727384] [2023-12-02 13:21:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:52,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:53,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:21:53,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371727384] [2023-12-02 13:21:53,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371727384] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:21:53,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:21:53,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:21:53,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134632969] [2023-12-02 13:21:53,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:21:53,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:21:53,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:21:53,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:21:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:53,921 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 13:21:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:21:54,083 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2023-12-02 13:21:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:21:54,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-12-02 13:21:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:21:54,086 INFO L225 Difference]: With dead ends: 180 [2023-12-02 13:21:54,086 INFO L226 Difference]: Without dead ends: 160 [2023-12-02 13:21:54,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:54,088 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 22 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:21:54,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 552 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:21:54,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-02 13:21:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-12-02 13:21:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 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 13:21:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2023-12-02 13:21:54,101 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2023-12-02 13:21:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:21:54,101 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2023-12-02 13:21:54,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 13:21:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2023-12-02 13:21:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 13:21:54,105 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:54,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:21:54,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:21:54,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:54,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash -974449304, now seen corresponding path program 1 times [2023-12-02 13:21:54,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:54,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022715307] [2023-12-02 13:21:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:54,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:55,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:21:55,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022715307] [2023-12-02 13:21:55,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022715307] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:21:55,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:21:55,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:21:55,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2157878] [2023-12-02 13:21:55,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:21:55,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:21:55,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:21:55,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:21:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:55,526 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 13:21:55,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:21:55,665 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2023-12-02 13:21:55,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:21:55,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-12-02 13:21:55,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:21:55,667 INFO L225 Difference]: With dead ends: 180 [2023-12-02 13:21:55,667 INFO L226 Difference]: Without dead ends: 160 [2023-12-02 13:21:55,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:55,669 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:21:55,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 383 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:21:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-02 13:21:55,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-12-02 13:21:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 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 13:21:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2023-12-02 13:21:55,680 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2023-12-02 13:21:55,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:21:55,680 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2023-12-02 13:21:55,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 13:21:55,681 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2023-12-02 13:21:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 13:21:55,683 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:55,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:21:55,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:21:55,684 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:55,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:55,684 INFO L85 PathProgramCache]: Analyzing trace with hash -195005774, now seen corresponding path program 1 times [2023-12-02 13:21:55,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:55,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942064528] [2023-12-02 13:21:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:55,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:56,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:21:56,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942064528] [2023-12-02 13:21:56,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942064528] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:21:56,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:21:56,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:21:56,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015032754] [2023-12-02 13:21:56,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:21:56,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:21:56,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:21:56,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:21:56,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:56,859 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 13:21:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:21:57,001 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2023-12-02 13:21:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:21:57,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-12-02 13:21:57,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:21:57,003 INFO L225 Difference]: With dead ends: 180 [2023-12-02 13:21:57,004 INFO L226 Difference]: Without dead ends: 160 [2023-12-02 13:21:57,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:57,005 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 18 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:21:57,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 382 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:21:57,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-02 13:21:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2023-12-02 13:21:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 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 13:21:57,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2023-12-02 13:21:57,015 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2023-12-02 13:21:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:21:57,015 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2023-12-02 13:21:57,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 13:21:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2023-12-02 13:21:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 13:21:57,017 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:57,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:21:57,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 13:21:57,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:57,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:57,018 INFO L85 PathProgramCache]: Analyzing trace with hash 100706970, now seen corresponding path program 1 times [2023-12-02 13:21:57,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:57,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514027296] [2023-12-02 13:21:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:57,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:21:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:21:58,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:21:58,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514027296] [2023-12-02 13:21:58,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514027296] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:21:58,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:21:58,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:21:58,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525881599] [2023-12-02 13:21:58,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:21:58,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:21:58,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:21:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:21:58,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:58,554 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 13:21:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:21:58,719 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2023-12-02 13:21:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:21:58,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-12-02 13:21:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:21:58,721 INFO L225 Difference]: With dead ends: 178 [2023-12-02 13:21:58,721 INFO L226 Difference]: Without dead ends: 158 [2023-12-02 13:21:58,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:21:58,723 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 15 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:21:58,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 544 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:21:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-12-02 13:21:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2023-12-02 13:21:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 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 13:21:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2023-12-02 13:21:58,731 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2023-12-02 13:21:58,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:21:58,731 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2023-12-02 13:21:58,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 13:21:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2023-12-02 13:21:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 13:21:58,733 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:21:58,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:21:58,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 13:21:58,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:21:58,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:21:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1261095713, now seen corresponding path program 1 times [2023-12-02 13:21:58,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:21:58,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385321853] [2023-12-02 13:21:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:21:58,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:21:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:00,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:00,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385321853] [2023-12-02 13:22:00,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385321853] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:22:00,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:22:00,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:22:00,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673717573] [2023-12-02 13:22:00,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:22:00,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:22:00,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:22:00,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:22:00,139 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 13:22:00,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:00,328 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2023-12-02 13:22:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:22:00,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-02 13:22:00,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:00,331 INFO L225 Difference]: With dead ends: 179 [2023-12-02 13:22:00,331 INFO L226 Difference]: Without dead ends: 159 [2023-12-02 13:22:00,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:22:00,332 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:00,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 564 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:22:00,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-02 13:22:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2023-12-02 13:22:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 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 13:22:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2023-12-02 13:22:00,339 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2023-12-02 13:22:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:00,340 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2023-12-02 13:22:00,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 13:22:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2023-12-02 13:22:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 13:22:00,341 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:00,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:22:00,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:22:00,341 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:00,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:00,342 INFO L85 PathProgramCache]: Analyzing trace with hash 777827269, now seen corresponding path program 1 times [2023-12-02 13:22:00,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:00,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886427550] [2023-12-02 13:22:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:00,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:02,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886427550] [2023-12-02 13:22:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886427550] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:22:02,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:22:02,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:22:02,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981150426] [2023-12-02 13:22:02,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:22:02,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:22:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:22:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:22:02,054 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 13:22:02,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:02,173 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2023-12-02 13:22:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:22:02,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-12-02 13:22:02,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:02,175 INFO L225 Difference]: With dead ends: 179 [2023-12-02 13:22:02,175 INFO L226 Difference]: Without dead ends: 159 [2023-12-02 13:22:02,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:22:02,177 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 7 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:02,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 380 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:22:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-02 13:22:02,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2023-12-02 13:22:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 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 13:22:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2023-12-02 13:22:02,183 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2023-12-02 13:22:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:02,183 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2023-12-02 13:22:02,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 13:22:02,184 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2023-12-02 13:22:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 13:22:02,184 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:02,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:22:02,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 13:22:02,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:02,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:02,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1663575584, now seen corresponding path program 1 times [2023-12-02 13:22:02,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:02,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009656282] [2023-12-02 13:22:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:02,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:02,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009656282] [2023-12-02 13:22:02,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009656282] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:22:02,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:22:02,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:22:02,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660949328] [2023-12-02 13:22:02,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:22:02,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:22:02,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:02,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:22:02,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:22:02,453 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 13:22:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:02,645 INFO L93 Difference]: Finished difference Result 182 states and 280 transitions. [2023-12-02 13:22:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:22:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-12-02 13:22:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:02,647 INFO L225 Difference]: With dead ends: 182 [2023-12-02 13:22:02,648 INFO L226 Difference]: Without dead ends: 162 [2023-12-02 13:22:02,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:22:02,649 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 12 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:02,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 748 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:22:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-12-02 13:22:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2023-12-02 13:22:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 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 13:22:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2023-12-02 13:22:02,656 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2023-12-02 13:22:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:02,656 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2023-12-02 13:22:02,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 13:22:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2023-12-02 13:22:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 13:22:02,657 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:02,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:22:02,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 13:22:02,658 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:02,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:02,658 INFO L85 PathProgramCache]: Analyzing trace with hash 196014541, now seen corresponding path program 1 times [2023-12-02 13:22:02,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:02,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433414768] [2023-12-02 13:22:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:02,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:07,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:07,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433414768] [2023-12-02 13:22:07,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433414768] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:22:07,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5963157] [2023-12-02 13:22:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:07,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:07,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:07,369 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:22:07,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:22:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:07,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:22:07,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:22:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:31,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:32:04,970 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-02 13:32:04,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-12-02 13:32:04,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2023-12-02 13:32:04,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1793180133] [2023-12-02 13:32:04,990 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2023-12-02 13:32:04,990 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:32:04,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:32:04,999 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:32:04,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:32:05,087 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:332) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:223) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2023-12-02 13:32:05,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:32:05,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 13:32:05,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531755102] [2023-12-02 13:32:05,091 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:32:05,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:32:05,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:32:05,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:32:05,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-12-02 13:32:05,093 INFO L87 Difference]: Start difference. First operand 155 states and 238 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 13:32:05,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-12-02 13:32:05,094 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:05,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:05,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-02 13:32:05,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 13:32:05,295 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-02 13:32:05,298 INFO L158 Benchmark]: Toolchain (without parser) took 621326.99ms. Allocated memory was 165.7MB in the beginning and 1.1GB in the end (delta: 937.4MB). Free memory was 128.4MB in the beginning and 429.3MB in the end (delta: -300.9MB). Peak memory consumption was 639.3MB. Max. memory is 16.1GB. [2023-12-02 13:32:05,298 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 165.7MB. Free memory is still 140.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:32:05,299 INFO L158 Benchmark]: CACSL2BoogieTranslator took 455.24ms. Allocated memory is still 165.7MB. Free memory was 128.2MB in the beginning and 103.8MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-12-02 13:32:05,299 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.08ms. Allocated memory is still 165.7MB. Free memory was 103.8MB in the beginning and 98.9MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 13:32:05,299 INFO L158 Benchmark]: Boogie Preprocessor took 65.96ms. Allocated memory is still 165.7MB. Free memory was 98.9MB in the beginning and 94.0MB in the end (delta: 4.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-12-02 13:32:05,300 INFO L158 Benchmark]: RCFGBuilder took 1880.60ms. Allocated memory was 165.7MB in the beginning and 199.2MB in the end (delta: 33.6MB). Free memory was 94.0MB in the beginning and 114.0MB in the end (delta: -20.0MB). Peak memory consumption was 60.7MB. Max. memory is 16.1GB. [2023-12-02 13:32:05,300 INFO L158 Benchmark]: TraceAbstraction took 618861.81ms. Allocated memory was 199.2MB in the beginning and 1.1GB in the end (delta: 903.9MB). Free memory was 114.0MB in the beginning and 429.3MB in the end (delta: -315.3MB). Peak memory consumption was 589.4MB. Max. memory is 16.1GB. [2023-12-02 13:32:05,302 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 165.7MB. Free memory is still 140.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 455.24ms. Allocated memory is still 165.7MB. Free memory was 128.2MB in the beginning and 103.8MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.08ms. Allocated memory is still 165.7MB. Free memory was 103.8MB in the beginning and 98.9MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.96ms. Allocated memory is still 165.7MB. Free memory was 98.9MB in the beginning and 94.0MB in the end (delta: 4.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1880.60ms. Allocated memory was 165.7MB in the beginning and 199.2MB in the end (delta: 33.6MB). Free memory was 94.0MB in the beginning and 114.0MB in the end (delta: -20.0MB). Peak memory consumption was 60.7MB. Max. memory is 16.1GB. * TraceAbstraction took 618861.81ms. Allocated memory was 199.2MB in the beginning and 1.1GB in the end (delta: 903.9MB). Free memory was 114.0MB in the beginning and 429.3MB in the end (delta: -315.3MB). Peak memory consumption was 589.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/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_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/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_5a74e857-8d4d-496e-a1a2-0fcee11e1088/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 2e33738ed6ea5e50e5f6c45ef52d667e94a1539d08a631ee5964d7b99a8f5c91 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:32:07,009 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:32:07,084 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 13:32:07,090 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:32:07,091 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:32:07,120 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:32:07,120 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:32:07,121 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:32:07,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:32:07,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:32:07,123 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:32:07,124 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:32:07,124 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:32:07,125 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:32:07,125 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:32:07,126 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:32:07,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:32:07,128 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:32:07,128 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:32:07,129 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:32:07,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:32:07,130 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:32:07,130 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:32:07,131 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:32:07,131 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 13:32:07,132 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 13:32:07,132 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 13:32:07,133 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:32:07,133 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:32:07,133 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:32:07,134 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:32:07,134 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 13:32:07,135 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:32:07,135 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:32:07,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:32:07,135 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:32:07,136 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:32:07,136 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:32:07,136 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 13:32:07,136 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 13:32:07,137 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:32:07,137 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:32:07,137 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:32:07,138 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:32:07,138 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_5a74e857-8d4d-496e-a1a2-0fcee11e1088/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e33738ed6ea5e50e5f6c45ef52d667e94a1539d08a631ee5964d7b99a8f5c91 [2023-12-02 13:32:07,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:32:07,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:32:07,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:32:07,451 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:32:07,451 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:32:07,453 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:32:10,241 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:32:10,476 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:32:10,476 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:32:10,488 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/data/b4e6c1166/704b32c436914c098d5198dbd764c039/FLAG00fd6dd15 [2023-12-02 13:32:10,501 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/data/b4e6c1166/704b32c436914c098d5198dbd764c039 [2023-12-02 13:32:10,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:32:10,504 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:32:10,505 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:32:10,506 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:32:10,510 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:32:10,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:10,511 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70110e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10, skipping insertion in model container [2023-12-02 13:32:10,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:10,569 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:32:10,813 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_5a74e857-8d4d-496e-a1a2-0fcee11e1088/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c[28368,28381] [2023-12-02 13:32:10,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:32:10,832 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:32:10,906 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_5a74e857-8d4d-496e-a1a2-0fcee11e1088/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c[28368,28381] [2023-12-02 13:32:10,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:32:10,922 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:32:10,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10 WrapperNode [2023-12-02 13:32:10,922 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:32:10,923 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:32:10,923 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:32:10,924 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:32:10,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:10,947 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:10,991 INFO L138 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 921 [2023-12-02 13:32:10,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:32:10,992 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:32:10,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:32:10,993 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:32:11,002 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:11,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:11,010 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:11,011 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:11,030 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:11,045 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:11,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:11,054 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:11,061 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:32:11,062 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:32:11,062 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:32:11,063 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:32:11,064 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (1/1) ... [2023-12-02 13:32:11,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:32:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:11,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:32:11,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:32:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:32:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 13:32:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:32:11,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:32:11,302 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:32:11,304 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:32:12,109 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:32:12,154 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:32:12,155 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 13:32:12,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:32:12 BoogieIcfgContainer [2023-12-02 13:32:12,156 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:32:12,158 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:32:12,158 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:32:12,161 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:32:12,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:32:10" (1/3) ... [2023-12-02 13:32:12,161 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f9b006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:32:12, skipping insertion in model container [2023-12-02 13:32:12,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:32:10" (2/3) ... [2023-12-02 13:32:12,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f9b006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:32:12, skipping insertion in model container [2023-12-02 13:32:12,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:32:12" (3/3) ... [2023-12-02 13:32:12,163 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c [2023-12-02 13:32:12,177 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:32:12,177 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:32:12,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:32:12,229 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;@165e056d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:32:12,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:32:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.8398576512455516) internal successors, (517), 282 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:12,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 13:32:12,247 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:12,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:32:12,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:12,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:12,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1778473613, now seen corresponding path program 1 times [2023-12-02 13:32:12,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:12,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567032901] [2023-12-02 13:32:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:12,265 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 13:32:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:12,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:12,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:12,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 13:32:12,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:12,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:12,510 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:12,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567032901] [2023-12-02 13:32:12,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567032901] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:12,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:12,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:32:12,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267720829] [2023-12-02 13:32:12,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:12,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 13:32:12,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:12,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 13:32:12,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:32:12,551 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.8398576512455516) internal successors, (517), 282 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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 13:32:12,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:12,604 INFO L93 Difference]: Finished difference Result 375 states and 681 transitions. [2023-12-02 13:32:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 13:32:12,606 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-12-02 13:32:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:12,619 INFO L225 Difference]: With dead ends: 375 [2023-12-02 13:32:12,619 INFO L226 Difference]: Without dead ends: 281 [2023-12-02 13:32:12,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:32:12,626 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:12,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 509 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-12-02 13:32:12,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2023-12-02 13:32:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.8285714285714285) internal successors, (512), 280 states have internal predecessors, (512), 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 13:32:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 512 transitions. [2023-12-02 13:32:12,680 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 512 transitions. Word has length 74 [2023-12-02 13:32:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:12,681 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 512 transitions. [2023-12-02 13:32:12,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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 13:32:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 512 transitions. [2023-12-02 13:32:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 13:32:12,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:12,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:32:12,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:12,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:12,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:12,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:12,889 INFO L85 PathProgramCache]: Analyzing trace with hash 711055349, now seen corresponding path program 1 times [2023-12-02 13:32:12,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:12,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455449922] [2023-12-02 13:32:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:12,890 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 13:32:12,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:12,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:12,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:13,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:32:13,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:13,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:13,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:13,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455449922] [2023-12-02 13:32:13,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455449922] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:13,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:13,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:32:13,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690696371] [2023-12-02 13:32:13,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:13,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:32:13,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:32:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:13,119 INFO L87 Difference]: Start difference. First operand 281 states and 512 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 13:32:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:13,222 INFO L93 Difference]: Finished difference Result 375 states and 675 transitions. [2023-12-02 13:32:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:32:13,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-12-02 13:32:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:13,226 INFO L225 Difference]: With dead ends: 375 [2023-12-02 13:32:13,226 INFO L226 Difference]: Without dead ends: 281 [2023-12-02 13:32:13,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:13,228 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 0 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:13,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1482 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:32:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-12-02 13:32:13,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2023-12-02 13:32:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.6785714285714286) internal successors, (470), 280 states have internal predecessors, (470), 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 13:32:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 470 transitions. [2023-12-02 13:32:13,246 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 470 transitions. Word has length 74 [2023-12-02 13:32:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:13,247 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 470 transitions. [2023-12-02 13:32:13,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 13:32:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 470 transitions. [2023-12-02 13:32:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 13:32:13,252 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:13,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:13,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:13,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:13,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:13,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:13,454 INFO L85 PathProgramCache]: Analyzing trace with hash 648159621, now seen corresponding path program 1 times [2023-12-02 13:32:13,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:13,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419160005] [2023-12-02 13:32:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:13,456 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 13:32:13,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:13,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:13,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 13:32:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:13,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:32:13,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:13,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:13,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:13,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419160005] [2023-12-02 13:32:13,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419160005] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:13,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:13,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:13,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415450555] [2023-12-02 13:32:13,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:13,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:13,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:13,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:13,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:13,682 INFO L87 Difference]: Start difference. First operand 281 states and 470 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 13:32:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:13,742 INFO L93 Difference]: Finished difference Result 452 states and 769 transitions. [2023-12-02 13:32:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:13,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-12-02 13:32:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:13,746 INFO L225 Difference]: With dead ends: 452 [2023-12-02 13:32:13,746 INFO L226 Difference]: Without dead ends: 361 [2023-12-02 13:32:13,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:13,748 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 130 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:13,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 879 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-12-02 13:32:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 358. [2023-12-02 13:32:13,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.6834733893557423) internal successors, (601), 357 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 601 transitions. [2023-12-02 13:32:13,765 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 601 transitions. Word has length 115 [2023-12-02 13:32:13,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:13,766 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 601 transitions. [2023-12-02 13:32:13,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 13:32:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 601 transitions. [2023-12-02 13:32:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-02 13:32:13,768 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:13,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:13,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 13:32:13,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:13,973 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:13,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:13,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1536040655, now seen corresponding path program 1 times [2023-12-02 13:32:13,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:13,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667765028] [2023-12-02 13:32:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:13,975 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 13:32:13,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:13,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:13,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-02 13:32:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:14,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:32:14,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:14,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:14,212 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:14,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667765028] [2023-12-02 13:32:14,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667765028] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:14,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:14,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:14,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831755282] [2023-12-02 13:32:14,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:14,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:14,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:14,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:14,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:14,215 INFO L87 Difference]: Start difference. First operand 358 states and 601 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:14,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:14,252 INFO L93 Difference]: Finished difference Result 676 states and 1149 transitions. [2023-12-02 13:32:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2023-12-02 13:32:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:14,257 INFO L225 Difference]: With dead ends: 676 [2023-12-02 13:32:14,257 INFO L226 Difference]: Without dead ends: 508 [2023-12-02 13:32:14,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:14,259 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 131 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:14,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 891 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-12-02 13:32:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 504. [2023-12-02 13:32:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.6918489065606361) internal successors, (851), 503 states have internal predecessors, (851), 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 13:32:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 851 transitions. [2023-12-02 13:32:14,279 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 851 transitions. Word has length 118 [2023-12-02 13:32:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:14,279 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 851 transitions. [2023-12-02 13:32:14,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 851 transitions. [2023-12-02 13:32:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-02 13:32:14,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:14,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:14,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-12-02 13:32:14,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:14,483 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:14,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1145213002, now seen corresponding path program 1 times [2023-12-02 13:32:14,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:14,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324707328] [2023-12-02 13:32:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:14,484 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 13:32:14,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:14,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:14,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:14,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:32:14,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:14,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:14,727 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:14,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324707328] [2023-12-02 13:32:14,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324707328] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:14,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:14,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:14,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804389588] [2023-12-02 13:32:14,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:14,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:14,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:14,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:14,731 INFO L87 Difference]: Start difference. First operand 504 states and 851 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:14,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:14,775 INFO L93 Difference]: Finished difference Result 1096 states and 1865 transitions. [2023-12-02 13:32:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:14,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-12-02 13:32:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:14,781 INFO L225 Difference]: With dead ends: 1096 [2023-12-02 13:32:14,781 INFO L226 Difference]: Without dead ends: 782 [2023-12-02 13:32:14,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:14,783 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 124 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:14,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 892 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2023-12-02 13:32:14,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 776. [2023-12-02 13:32:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 1.6916129032258065) internal successors, (1311), 775 states have internal predecessors, (1311), 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 13:32:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1311 transitions. [2023-12-02 13:32:14,814 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1311 transitions. Word has length 121 [2023-12-02 13:32:14,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:14,814 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1311 transitions. [2023-12-02 13:32:14,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1311 transitions. [2023-12-02 13:32:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 13:32:14,817 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:14,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:14,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:15,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:15,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:15,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:15,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1127178636, now seen corresponding path program 1 times [2023-12-02 13:32:15,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:15,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780565376] [2023-12-02 13:32:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:15,028 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 13:32:15,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:15,029 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:15,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-02 13:32:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:15,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:32:15,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:15,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:15,259 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:15,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780565376] [2023-12-02 13:32:15,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780565376] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:15,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:15,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:15,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941330027] [2023-12-02 13:32:15,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:15,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:15,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:15,261 INFO L87 Difference]: Start difference. First operand 776 states and 1311 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:15,303 INFO L93 Difference]: Finished difference Result 1876 states and 3177 transitions. [2023-12-02 13:32:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:15,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2023-12-02 13:32:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:15,310 INFO L225 Difference]: With dead ends: 1876 [2023-12-02 13:32:15,310 INFO L226 Difference]: Without dead ends: 1290 [2023-12-02 13:32:15,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:15,312 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 117 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:15,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 893 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2023-12-02 13:32:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1280. [2023-12-02 13:32:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 1.6817826426896012) internal successors, (2151), 1279 states have internal predecessors, (2151), 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 13:32:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 2151 transitions. [2023-12-02 13:32:15,350 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 2151 transitions. Word has length 124 [2023-12-02 13:32:15,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:15,351 INFO L495 AbstractCegarLoop]: Abstraction has 1280 states and 2151 transitions. [2023-12-02 13:32:15,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:15,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 2151 transitions. [2023-12-02 13:32:15,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 13:32:15,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:15,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:15,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-02 13:32:15,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:15,553 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:15,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:15,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1287551471, now seen corresponding path program 1 times [2023-12-02 13:32:15,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:15,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271459055] [2023-12-02 13:32:15,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:15,555 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 13:32:15,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:15,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:15,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:15,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:32:15,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:15,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:15,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:15,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271459055] [2023-12-02 13:32:15,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271459055] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:15,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:15,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:15,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508615959] [2023-12-02 13:32:15,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:15,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:32:15,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:15,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:32:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:15,898 INFO L87 Difference]: Start difference. First operand 1280 states and 2151 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:15,996 INFO L93 Difference]: Finished difference Result 3760 states and 6304 transitions. [2023-12-02 13:32:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:32:15,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2023-12-02 13:32:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:16,008 INFO L225 Difference]: With dead ends: 3760 [2023-12-02 13:32:16,008 INFO L226 Difference]: Without dead ends: 2522 [2023-12-02 13:32:16,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:32:16,011 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 787 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:16,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1105 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:32:16,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2023-12-02 13:32:16,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2520. [2023-12-02 13:32:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 1.666931321953156) internal successors, (4199), 2519 states have internal predecessors, (4199), 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 13:32:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 4199 transitions. [2023-12-02 13:32:16,080 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 4199 transitions. Word has length 127 [2023-12-02 13:32:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:16,081 INFO L495 AbstractCegarLoop]: Abstraction has 2520 states and 4199 transitions. [2023-12-02 13:32:16,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 4199 transitions. [2023-12-02 13:32:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 13:32:16,083 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:16,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:16,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:16,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:16,284 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:16,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:16,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1967609841, now seen corresponding path program 1 times [2023-12-02 13:32:16,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:16,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554342388] [2023-12-02 13:32:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:16,285 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 13:32:16,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:16,286 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:16,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:16,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:32:16,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:17,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:17,111 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:17,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554342388] [2023-12-02 13:32:17,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554342388] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:17,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:17,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:32:17,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569107538] [2023-12-02 13:32:17,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:17,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:32:17,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:17,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:32:17,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:32:17,114 INFO L87 Difference]: Start difference. First operand 2520 states and 4199 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:17,462 INFO L93 Difference]: Finished difference Result 9334 states and 15776 transitions. [2023-12-02 13:32:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:32:17,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2023-12-02 13:32:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:17,503 INFO L225 Difference]: With dead ends: 9334 [2023-12-02 13:32:17,503 INFO L226 Difference]: Without dead ends: 7164 [2023-12-02 13:32:17,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:32:17,508 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 729 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 2135 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:17,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 2135 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:32:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7164 states. [2023-12-02 13:32:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7164 to 5612. [2023-12-02 13:32:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5612 states, 5611 states have (on average 1.6711816075565853) internal successors, (9377), 5611 states have internal predecessors, (9377), 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 13:32:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5612 states to 5612 states and 9377 transitions. [2023-12-02 13:32:17,719 INFO L78 Accepts]: Start accepts. Automaton has 5612 states and 9377 transitions. Word has length 127 [2023-12-02 13:32:17,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:17,720 INFO L495 AbstractCegarLoop]: Abstraction has 5612 states and 9377 transitions. [2023-12-02 13:32:17,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:32:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5612 states and 9377 transitions. [2023-12-02 13:32:17,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 13:32:17,724 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:17,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:17,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-12-02 13:32:17,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:17,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:17,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:17,925 INFO L85 PathProgramCache]: Analyzing trace with hash -934566608, now seen corresponding path program 1 times [2023-12-02 13:32:17,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:17,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568962850] [2023-12-02 13:32:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:17,926 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 13:32:17,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:17,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:17,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:18,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:32:18,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:18,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:18,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:18,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568962850] [2023-12-02 13:32:18,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568962850] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:18,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:18,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:32:18,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001640116] [2023-12-02 13:32:18,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:18,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:32:18,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:32:18,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:18,316 INFO L87 Difference]: Start difference. First operand 5612 states and 9377 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 13:32:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:18,570 INFO L93 Difference]: Finished difference Result 14526 states and 24486 transitions. [2023-12-02 13:32:18,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:32:18,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-12-02 13:32:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:18,624 INFO L225 Difference]: With dead ends: 14526 [2023-12-02 13:32:18,624 INFO L226 Difference]: Without dead ends: 9264 [2023-12-02 13:32:18,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:18,632 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 287 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:18,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 1498 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:32:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9264 states. [2023-12-02 13:32:18,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9264 to 8302. [2023-12-02 13:32:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8302 states, 8301 states have (on average 1.6765449945789663) internal successors, (13917), 8301 states have internal predecessors, (13917), 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 13:32:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8302 states to 8302 states and 13917 transitions. [2023-12-02 13:32:18,901 INFO L78 Accepts]: Start accepts. Automaton has 8302 states and 13917 transitions. Word has length 128 [2023-12-02 13:32:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:18,902 INFO L495 AbstractCegarLoop]: Abstraction has 8302 states and 13917 transitions. [2023-12-02 13:32:18,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 13:32:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 8302 states and 13917 transitions. [2023-12-02 13:32:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 13:32:18,907 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:18,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:18,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:19,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:19,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:19,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1030454296, now seen corresponding path program 1 times [2023-12-02 13:32:19,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:19,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109972451] [2023-12-02 13:32:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:19,109 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 13:32:19,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:19,110 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:19,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-02 13:32:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:19,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:32:19,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:19,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:19,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:19,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109972451] [2023-12-02 13:32:19,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109972451] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:19,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:19,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:32:19,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064916162] [2023-12-02 13:32:19,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:19,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:32:19,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:19,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:32:19,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:19,514 INFO L87 Difference]: Start difference. First operand 8302 states and 13917 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 13:32:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:19,722 INFO L93 Difference]: Finished difference Result 21470 states and 36180 transitions. [2023-12-02 13:32:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:32:19,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2023-12-02 13:32:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:19,756 INFO L225 Difference]: With dead ends: 21470 [2023-12-02 13:32:19,756 INFO L226 Difference]: Without dead ends: 13518 [2023-12-02 13:32:19,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:19,765 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 286 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:19,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1412 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:32:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13518 states. [2023-12-02 13:32:19,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13518 to 12216. [2023-12-02 13:32:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12216 states, 12215 states have (on average 1.6750716332378224) internal successors, (20461), 12215 states have internal predecessors, (20461), 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 13:32:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 20461 transitions. [2023-12-02 13:32:20,063 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 20461 transitions. Word has length 129 [2023-12-02 13:32:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:20,064 INFO L495 AbstractCegarLoop]: Abstraction has 12216 states and 20461 transitions. [2023-12-02 13:32:20,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 13:32:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 20461 transitions. [2023-12-02 13:32:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 13:32:20,070 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:20,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:20,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-02 13:32:20,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:20,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:20,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:20,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1822011929, now seen corresponding path program 1 times [2023-12-02 13:32:20,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:20,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244368786] [2023-12-02 13:32:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:20,272 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 13:32:20,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:20,274 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:20,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-02 13:32:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:20,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:32:20,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:20,672 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:20,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:20,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244368786] [2023-12-02 13:32:20,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244368786] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:20,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:20,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:32:20,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532496243] [2023-12-02 13:32:20,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:20,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:32:20,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:20,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:32:20,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:20,676 INFO L87 Difference]: Start difference. First operand 12216 states and 20461 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 13:32:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:21,036 INFO L93 Difference]: Finished difference Result 31390 states and 52821 transitions. [2023-12-02 13:32:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:32:21,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-12-02 13:32:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:21,077 INFO L225 Difference]: With dead ends: 31390 [2023-12-02 13:32:21,077 INFO L226 Difference]: Without dead ends: 19524 [2023-12-02 13:32:21,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:21,092 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 285 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:21,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1491 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:32:21,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19524 states. [2023-12-02 13:32:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19524 to 17870. [2023-12-02 13:32:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17870 states, 17869 states have (on average 1.6731770104650512) internal successors, (29898), 17869 states have internal predecessors, (29898), 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 13:32:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17870 states to 17870 states and 29898 transitions. [2023-12-02 13:32:21,635 INFO L78 Accepts]: Start accepts. Automaton has 17870 states and 29898 transitions. Word has length 130 [2023-12-02 13:32:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:21,635 INFO L495 AbstractCegarLoop]: Abstraction has 17870 states and 29898 transitions. [2023-12-02 13:32:21,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 13:32:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 17870 states and 29898 transitions. [2023-12-02 13:32:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 13:32:21,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:21,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:21,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-12-02 13:32:21,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:21,844 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:21,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1116412873, now seen corresponding path program 1 times [2023-12-02 13:32:21,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:21,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254294831] [2023-12-02 13:32:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:21,845 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 13:32:21,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:21,846 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:21,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:21,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:32:21,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:22,052 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:22,052 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:22,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254294831] [2023-12-02 13:32:22,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254294831] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:22,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:22,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:22,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460348378] [2023-12-02 13:32:22,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:22,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:22,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:22,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:22,054 INFO L87 Difference]: Start difference. First operand 17870 states and 29898 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 13:32:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:22,356 INFO L93 Difference]: Finished difference Result 39073 states and 65450 transitions. [2023-12-02 13:32:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-12-02 13:32:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:22,403 INFO L225 Difference]: With dead ends: 39073 [2023-12-02 13:32:22,403 INFO L226 Difference]: Without dead ends: 27717 [2023-12-02 13:32:22,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:22,418 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 116 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:22,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 955 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27717 states. [2023-12-02 13:32:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27717 to 27715. [2023-12-02 13:32:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27715 states, 27714 states have (on average 1.6612903225806452) internal successors, (46041), 27714 states have internal predecessors, (46041), 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 13:32:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27715 states to 27715 states and 46041 transitions. [2023-12-02 13:32:22,972 INFO L78 Accepts]: Start accepts. Automaton has 27715 states and 46041 transitions. Word has length 130 [2023-12-02 13:32:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:22,973 INFO L495 AbstractCegarLoop]: Abstraction has 27715 states and 46041 transitions. [2023-12-02 13:32:22,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 13:32:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 27715 states and 46041 transitions. [2023-12-02 13:32:22,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 13:32:22,977 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:22,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:22,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:23,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:23,178 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:23,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:23,179 INFO L85 PathProgramCache]: Analyzing trace with hash -325570122, now seen corresponding path program 1 times [2023-12-02 13:32:23,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:23,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390967516] [2023-12-02 13:32:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:23,179 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 13:32:23,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:23,180 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:23,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:23,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:32:23,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:23,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:23,334 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:23,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390967516] [2023-12-02 13:32:23,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390967516] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:23,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:23,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:23,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369126790] [2023-12-02 13:32:23,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:23,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:23,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:23,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:23,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:23,337 INFO L87 Difference]: Start difference. First operand 27715 states and 46041 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 13:32:23,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:23,750 INFO L93 Difference]: Finished difference Result 61483 states and 102371 transitions. [2023-12-02 13:32:23,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:23,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-12-02 13:32:23,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:23,795 INFO L225 Difference]: With dead ends: 61483 [2023-12-02 13:32:23,795 INFO L226 Difference]: Without dead ends: 42075 [2023-12-02 13:32:23,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:23,815 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 123 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:23,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 983 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42075 states. [2023-12-02 13:32:24,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42075 to 42073. [2023-12-02 13:32:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42073 states, 42072 states have (on average 1.6521439437155352) internal successors, (69509), 42072 states have internal predecessors, (69509), 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 13:32:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42073 states to 42073 states and 69509 transitions. [2023-12-02 13:32:24,455 INFO L78 Accepts]: Start accepts. Automaton has 42073 states and 69509 transitions. Word has length 130 [2023-12-02 13:32:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:24,455 INFO L495 AbstractCegarLoop]: Abstraction has 42073 states and 69509 transitions. [2023-12-02 13:32:24,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 13:32:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 42073 states and 69509 transitions. [2023-12-02 13:32:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 13:32:24,458 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:24,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:24,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-12-02 13:32:24,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:24,659 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:24,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:24,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1128892247, now seen corresponding path program 1 times [2023-12-02 13:32:24,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:24,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396370492] [2023-12-02 13:32:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:24,660 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 13:32:24,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:24,661 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:24,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-12-02 13:32:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:24,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:32:24,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:24,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:24,799 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:24,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396370492] [2023-12-02 13:32:24,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396370492] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:24,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:24,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:24,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252794396] [2023-12-02 13:32:24,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:24,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:24,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:24,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:24,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:24,801 INFO L87 Difference]: Start difference. First operand 42073 states and 69509 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 13:32:25,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:25,492 INFO L93 Difference]: Finished difference Result 94343 states and 155981 transitions. [2023-12-02 13:32:25,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:25,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-12-02 13:32:25,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:25,561 INFO L225 Difference]: With dead ends: 94343 [2023-12-02 13:32:25,561 INFO L226 Difference]: Without dead ends: 64478 [2023-12-02 13:32:25,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:25,581 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 130 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:25,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1012 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64478 states. [2023-12-02 13:32:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64478 to 64476. [2023-12-02 13:32:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64476 states, 64475 states have (on average 1.6386816595579683) internal successors, (105654), 64475 states have internal predecessors, (105654), 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 13:32:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64476 states to 64476 states and 105654 transitions. [2023-12-02 13:32:26,666 INFO L78 Accepts]: Start accepts. Automaton has 64476 states and 105654 transitions. Word has length 130 [2023-12-02 13:32:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:26,666 INFO L495 AbstractCegarLoop]: Abstraction has 64476 states and 105654 transitions. [2023-12-02 13:32:26,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 13:32:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 64476 states and 105654 transitions. [2023-12-02 13:32:26,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 13:32:26,670 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:26,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:26,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-12-02 13:32:26,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:26,871 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:26,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:26,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1684389571, now seen corresponding path program 1 times [2023-12-02 13:32:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:26,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410940938] [2023-12-02 13:32:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:26,872 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 13:32:26,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:26,873 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:26,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-02 13:32:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:26,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:32:26,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:27,008 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:27,009 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:27,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410940938] [2023-12-02 13:32:27,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410940938] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:27,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:27,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:27,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041999284] [2023-12-02 13:32:27,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:27,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:27,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:27,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:27,011 INFO L87 Difference]: Start difference. First operand 64476 states and 105654 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 13:32:27,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:27,929 INFO L93 Difference]: Finished difference Result 146373 states and 241843 transitions. [2023-12-02 13:32:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:27,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2023-12-02 13:32:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:28,034 INFO L225 Difference]: With dead ends: 146373 [2023-12-02 13:32:28,034 INFO L226 Difference]: Without dead ends: 99695 [2023-12-02 13:32:28,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:28,060 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 137 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:28,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1033 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99695 states. [2023-12-02 13:32:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99695 to 99693. [2023-12-02 13:32:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99693 states, 99692 states have (on average 1.6342033463066243) internal successors, (162917), 99692 states have internal predecessors, (162917), 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 13:32:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99693 states to 99693 states and 162917 transitions. [2023-12-02 13:32:29,781 INFO L78 Accepts]: Start accepts. Automaton has 99693 states and 162917 transitions. Word has length 131 [2023-12-02 13:32:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:29,782 INFO L495 AbstractCegarLoop]: Abstraction has 99693 states and 162917 transitions. [2023-12-02 13:32:29,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 13:32:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 99693 states and 162917 transitions. [2023-12-02 13:32:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 13:32:29,784 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:29,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:29,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-12-02 13:32:29,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:29,985 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:29,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:29,985 INFO L85 PathProgramCache]: Analyzing trace with hash 595946529, now seen corresponding path program 1 times [2023-12-02 13:32:29,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:29,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387915144] [2023-12-02 13:32:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:29,986 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 13:32:29,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:29,987 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:29,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:30,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:32:30,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:30,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:30,317 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:30,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387915144] [2023-12-02 13:32:30,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387915144] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:30,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:30,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:32:30,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191633788] [2023-12-02 13:32:30,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:30,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:32:30,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:30,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:32:30,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:30,319 INFO L87 Difference]: Start difference. First operand 99693 states and 162917 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 13:32:32,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:32,126 INFO L93 Difference]: Finished difference Result 296710 states and 485028 transitions. [2023-12-02 13:32:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:32:32,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2023-12-02 13:32:32,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:32,370 INFO L225 Difference]: With dead ends: 296710 [2023-12-02 13:32:32,370 INFO L226 Difference]: Without dead ends: 197413 [2023-12-02 13:32:32,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:32,417 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 408 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:32,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 1053 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:32:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197413 states. [2023-12-02 13:32:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197413 to 148105. [2023-12-02 13:32:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148105 states, 148104 states have (on average 1.6244935990925295) internal successors, (240594), 148104 states have internal predecessors, (240594), 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 13:32:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148105 states to 148105 states and 240594 transitions. [2023-12-02 13:32:35,379 INFO L78 Accepts]: Start accepts. Automaton has 148105 states and 240594 transitions. Word has length 131 [2023-12-02 13:32:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:35,379 INFO L495 AbstractCegarLoop]: Abstraction has 148105 states and 240594 transitions. [2023-12-02 13:32:35,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 13:32:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 148105 states and 240594 transitions. [2023-12-02 13:32:35,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 13:32:35,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:35,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:35,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:35,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:35,583 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:35,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2044020662, now seen corresponding path program 1 times [2023-12-02 13:32:35,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:35,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309589731] [2023-12-02 13:32:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:35,585 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 13:32:35,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:35,586 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:35,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:35,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:32:35,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:36,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:36,270 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:36,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309589731] [2023-12-02 13:32:36,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309589731] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:36,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:36,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:32:36,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122399523] [2023-12-02 13:32:36,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:36,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:32:36,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:36,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:32:36,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:32:36,272 INFO L87 Difference]: Start difference. First operand 148105 states and 240594 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 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 13:32:38,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:38,749 INFO L93 Difference]: Finished difference Result 411597 states and 672799 transitions. [2023-12-02 13:32:38,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:32:38,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2023-12-02 13:32:38,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:39,215 INFO L225 Difference]: With dead ends: 411597 [2023-12-02 13:32:39,215 INFO L226 Difference]: Without dead ends: 263888 [2023-12-02 13:32:39,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:32:39,280 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 713 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 2148 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:39,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 2148 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:32:39,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263888 states. [2023-12-02 13:32:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263888 to 234804. [2023-12-02 13:32:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234804 states, 234803 states have (on average 1.6243787345136136) internal successors, (381409), 234803 states have internal predecessors, (381409), 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 13:32:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234804 states to 234804 states and 381409 transitions. [2023-12-02 13:32:43,764 INFO L78 Accepts]: Start accepts. Automaton has 234804 states and 381409 transitions. Word has length 136 [2023-12-02 13:32:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:43,764 INFO L495 AbstractCegarLoop]: Abstraction has 234804 states and 381409 transitions. [2023-12-02 13:32:43,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 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 13:32:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 234804 states and 381409 transitions. [2023-12-02 13:32:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 13:32:43,765 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:43,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:43,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 13:32:43,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:43,966 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:43,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:43,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1074419008, now seen corresponding path program 1 times [2023-12-02 13:32:43,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:43,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730071871] [2023-12-02 13:32:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:43,967 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 13:32:43,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:43,968 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:43,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 13:32:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:44,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:32:44,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:44,112 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:44,112 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:44,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730071871] [2023-12-02 13:32:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730071871] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:44,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:44,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:32:44,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115609715] [2023-12-02 13:32:44,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:44,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:32:44,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:32:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:44,115 INFO L87 Difference]: Start difference. First operand 234804 states and 381409 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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 13:32:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:46,178 INFO L93 Difference]: Finished difference Result 246890 states and 397522 transitions. [2023-12-02 13:32:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:32:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2023-12-02 13:32:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:46,463 INFO L225 Difference]: With dead ends: 246890 [2023-12-02 13:32:46,463 INFO L226 Difference]: Without dead ends: 246888 [2023-12-02 13:32:46,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:46,490 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 1 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:46,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1384 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:46,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246888 states. [2023-12-02 13:32:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246888 to 242860. [2023-12-02 13:32:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242860 states, 242859 states have (on average 1.603444797186845) internal successors, (389411), 242859 states have internal predecessors, (389411), 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 13:32:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242860 states to 242860 states and 389411 transitions. [2023-12-02 13:32:51,040 INFO L78 Accepts]: Start accepts. Automaton has 242860 states and 389411 transitions. Word has length 137 [2023-12-02 13:32:51,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:51,041 INFO L495 AbstractCegarLoop]: Abstraction has 242860 states and 389411 transitions. [2023-12-02 13:32:51,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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 13:32:51,041 INFO L276 IsEmpty]: Start isEmpty. Operand 242860 states and 389411 transitions. [2023-12-02 13:32:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 13:32:51,045 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:51,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:51,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 13:32:51,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:51,246 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:51,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:51,247 INFO L85 PathProgramCache]: Analyzing trace with hash -949936807, now seen corresponding path program 1 times [2023-12-02 13:32:51,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:51,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964782372] [2023-12-02 13:32:51,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:51,247 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 13:32:51,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:51,248 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:51,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-12-02 13:32:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:51,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:32:51,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:51,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:51,436 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964782372] [2023-12-02 13:32:51,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964782372] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:51,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:51,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:51,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579116675] [2023-12-02 13:32:51,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:51,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:51,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:51,438 INFO L87 Difference]: Start difference. First operand 242860 states and 389411 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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 13:32:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:53,634 INFO L93 Difference]: Finished difference Result 443328 states and 714314 transitions. [2023-12-02 13:32:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:53,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2023-12-02 13:32:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:53,884 INFO L225 Difference]: With dead ends: 443328 [2023-12-02 13:32:53,884 INFO L226 Difference]: Without dead ends: 200864 [2023-12-02 13:32:53,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:32:53,944 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 112 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:53,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 990 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:32:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200864 states. [2023-12-02 13:32:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200864 to 200862. [2023-12-02 13:32:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200862 states, 200861 states have (on average 1.61189081006268) internal successors, (323766), 200861 states have internal predecessors, (323766), 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 13:32:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200862 states to 200862 states and 323766 transitions. [2023-12-02 13:32:57,543 INFO L78 Accepts]: Start accepts. Automaton has 200862 states and 323766 transitions. Word has length 173 [2023-12-02 13:32:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:57,543 INFO L495 AbstractCegarLoop]: Abstraction has 200862 states and 323766 transitions. [2023-12-02 13:32:57,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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 13:32:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 200862 states and 323766 transitions. [2023-12-02 13:32:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-12-02 13:32:57,546 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:57,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:57,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-12-02 13:32:57,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:57,747 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:57,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:57,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1744786975, now seen corresponding path program 1 times [2023-12-02 13:32:57,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:32:57,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423567422] [2023-12-02 13:32:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:57,748 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 13:32:57,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:32:57,749 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:57,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:32:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:57,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:32:57,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:32:58,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:58,025 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:32:58,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423567422] [2023-12-02 13:32:58,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423567422] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:58,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:32:58,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:32:58,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885338442] [2023-12-02 13:32:58,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:58,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:32:58,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:32:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:32:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:32:58,027 INFO L87 Difference]: Start difference. First operand 200862 states and 323766 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 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 13:33:01,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:01,672 INFO L93 Difference]: Finished difference Result 600761 states and 967660 transitions. [2023-12-02 13:33:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:33:01,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2023-12-02 13:33:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:02,323 INFO L225 Difference]: With dead ends: 600761 [2023-12-02 13:33:02,323 INFO L226 Difference]: Without dead ends: 399937 [2023-12-02 13:33:02,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:33:02,412 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 839 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:02,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 1057 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:33:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399937 states. [2023-12-02 13:33:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399937 to 399935. [2023-12-02 13:33:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399935 states, 399934 states have (on average 1.6005290872994045) internal successors, (640106), 399934 states have internal predecessors, (640106), 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 13:33:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399935 states to 399935 states and 640106 transitions. [2023-12-02 13:33:09,275 INFO L78 Accepts]: Start accepts. Automaton has 399935 states and 640106 transitions. Word has length 174 [2023-12-02 13:33:09,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:09,276 INFO L495 AbstractCegarLoop]: Abstraction has 399935 states and 640106 transitions. [2023-12-02 13:33:09,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 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 13:33:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 399935 states and 640106 transitions. [2023-12-02 13:33:09,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-02 13:33:09,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:09,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:33:09,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 13:33:09,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:33:09,483 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:09,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1669982824, now seen corresponding path program 1 times [2023-12-02 13:33:09,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:33:09,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982633067] [2023-12-02 13:33:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:09,484 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 13:33:09,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:33:09,485 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:33:09,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-12-02 13:33:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:09,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:33:09,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:33:09,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:33:09,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:33:09,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982633067] [2023-12-02 13:33:09,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982633067] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:33:09,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:33:09,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:33:09,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100539562] [2023-12-02 13:33:09,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:33:09,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:33:09,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:33:09,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:33:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:33:09,793 INFO L87 Difference]: Start difference. First operand 399935 states and 640106 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 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 13:33:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:16,973 INFO L93 Difference]: Finished difference Result 1196138 states and 1913021 transitions. [2023-12-02 13:33:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:33:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2023-12-02 13:33:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:18,012 INFO L225 Difference]: With dead ends: 1196138 [2023-12-02 13:33:18,012 INFO L226 Difference]: Without dead ends: 796284 [2023-12-02 13:33:18,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:33:18,489 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 798 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:18,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 1072 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:33:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796284 states. [2023-12-02 13:33:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796284 to 796282. [2023-12-02 13:33:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796282 states, 796281 states have (on average 1.5890659201965136) internal successors, (1265343), 796281 states have internal predecessors, (1265343), 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 13:33:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796282 states to 796282 states and 1265343 transitions. [2023-12-02 13:33:32,786 INFO L78 Accepts]: Start accepts. Automaton has 796282 states and 1265343 transitions. Word has length 175 [2023-12-02 13:33:32,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:32,787 INFO L495 AbstractCegarLoop]: Abstraction has 796282 states and 1265343 transitions. [2023-12-02 13:33:32,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 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 13:33:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 796282 states and 1265343 transitions. [2023-12-02 13:33:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-12-02 13:33:32,804 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:32,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:33:32,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-12-02 13:33:33,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:33:33,008 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:33,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:33,008 INFO L85 PathProgramCache]: Analyzing trace with hash -749691289, now seen corresponding path program 1 times [2023-12-02 13:33:33,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:33:33,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584293143] [2023-12-02 13:33:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:33,009 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 13:33:33,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:33:33,010 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:33:33,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-12-02 13:33:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:33,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:33:33,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:33:33,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:33:33,302 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:33:33,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584293143] [2023-12-02 13:33:33,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584293143] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:33:33,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:33:33,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:33:33,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607965410] [2023-12-02 13:33:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:33:33,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:33:33,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:33:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:33:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:33:33,305 INFO L87 Difference]: Start difference. First operand 796282 states and 1265343 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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 13:33:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:43,915 INFO L93 Difference]: Finished difference Result 1684506 states and 2666989 transitions. [2023-12-02 13:33:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:33:43,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2023-12-02 13:33:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:45,530 INFO L225 Difference]: With dead ends: 1684506 [2023-12-02 13:33:45,530 INFO L226 Difference]: Without dead ends: 889856 [2023-12-02 13:33:45,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:33:45,818 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 148 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:45,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1378 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:33:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889856 states. [2023-12-02 13:33:58,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889856 to 887254. [2023-12-02 13:33:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887254 states, 887253 states have (on average 1.5642742261790041) internal successors, (1387907), 887253 states have internal predecessors, (1387907), 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 13:34:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887254 states to 887254 states and 1387907 transitions. [2023-12-02 13:34:01,895 INFO L78 Accepts]: Start accepts. Automaton has 887254 states and 1387907 transitions. Word has length 176 [2023-12-02 13:34:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:34:01,895 INFO L495 AbstractCegarLoop]: Abstraction has 887254 states and 1387907 transitions. [2023-12-02 13:34:01,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 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 13:34:01,896 INFO L276 IsEmpty]: Start isEmpty. Operand 887254 states and 1387907 transitions. [2023-12-02 13:34:01,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-02 13:34:01,905 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:34:01,906 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:34:01,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-12-02 13:34:02,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:34:02,106 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:34:02,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:34:02,107 INFO L85 PathProgramCache]: Analyzing trace with hash -254725798, now seen corresponding path program 1 times [2023-12-02 13:34:02,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:34:02,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211627684] [2023-12-02 13:34:02,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:34:02,107 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 13:34:02,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:34:02,108 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:34:02,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a74e857-8d4d-496e-a1a2-0fcee11e1088/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 13:34:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:34:02,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:34:02,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:34:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:34:02,327 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:34:02,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:34:02,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211627684] [2023-12-02 13:34:02,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211627684] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:34:02,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:34:02,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:34:02,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070331709] [2023-12-02 13:34:02,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:34:02,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:34:02,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:34:02,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:34:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:34:02,329 INFO L87 Difference]: Start difference. First operand 887254 states and 1387907 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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 13:34:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:34:08,013 INFO L93 Difference]: Finished difference Result 1211242 states and 1905565 transitions. [2023-12-02 13:34:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:34:08,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2023-12-02 13:34:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:34:08,537 INFO L225 Difference]: With dead ends: 1211242 [2023-12-02 13:34:08,537 INFO L226 Difference]: Without dead ends: 368392 [2023-12-02 13:34:08,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:34:08,796 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 97 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:34:08,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 949 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:34:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368392 states.