./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.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_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/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_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/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_afcb6e01-2597-40c6-98ff-f976adda640d/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 760447de6aa5739f187553f004f72c898b25c540c6dba08996c9520ae7051de1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:23:44,987 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:23:45,072 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:23:45,079 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:23:45,079 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:23:45,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:23:45,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:23:45,110 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:23:45,111 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:23:45,111 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:23:45,112 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:23:45,113 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:23:45,113 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:23:45,114 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:23:45,114 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:23:45,115 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:23:45,115 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:23:45,116 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:23:45,116 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:23:45,117 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:23:45,118 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:23:45,118 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:23:45,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:23:45,120 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:23:45,120 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:23:45,121 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:23:45,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:23:45,122 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:23:45,122 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:23:45,122 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:23:45,123 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:23:45,123 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:23:45,124 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:23:45,124 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:23:45,124 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:23:45,125 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:23:45,125 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:23:45,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:23:45,125 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:23:45,126 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:23:45,126 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:23:45,126 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:23:45,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:23:45,127 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:23:45,127 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:23:45,127 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:23:45,128 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:23:45,128 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_afcb6e01-2597-40c6-98ff-f976adda640d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 760447de6aa5739f187553f004f72c898b25c540c6dba08996c9520ae7051de1 [2023-12-02 12:23:45,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:23:45,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:23:45,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:23:45,420 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:23:45,420 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:23:45,422 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c [2023-12-02 12:23:48,779 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:23:49,050 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:23:49,051 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c [2023-12-02 12:23:49,061 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/data/54955025b/7144700f74274ef48d738a01261d13fa/FLAG0502e3fd1 [2023-12-02 12:23:49,074 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/data/54955025b/7144700f74274ef48d738a01261d13fa [2023-12-02 12:23:49,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:23:49,079 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:23:49,081 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:23:49,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:23:49,087 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:23:49,088 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,090 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aead84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49, skipping insertion in model container [2023-12-02 12:23:49,090 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,146 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:23:49,411 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_afcb6e01-2597-40c6-98ff-f976adda640d/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c[20047,20060] [2023-12-02 12:23:49,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:23:49,434 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:23:49,513 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_afcb6e01-2597-40c6-98ff-f976adda640d/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c[20047,20060] [2023-12-02 12:23:49,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:23:49,537 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:23:49,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49 WrapperNode [2023-12-02 12:23:49,538 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:23:49,539 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:23:49,539 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:23:49,539 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:23:49,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,563 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,601 INFO L138 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 451 [2023-12-02 12:23:49,601 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:23:49,602 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:23:49,602 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:23:49,602 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:23:49,611 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,616 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,616 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,636 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,639 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,643 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:23:49,644 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:23:49,644 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:23:49,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:23:49,645 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (1/1) ... [2023-12-02 12:23:49,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:23:49,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:23:49,683 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:23:49,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:23:49,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:23:49,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:23:49,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:23:49,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:23:49,848 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:23:49,850 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:23:50,420 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:23:51,272 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:23:51,273 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 12:23:51,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:23:51 BoogieIcfgContainer [2023-12-02 12:23:51,274 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:23:51,277 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:23:51,277 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:23:51,280 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:23:51,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:23:49" (1/3) ... [2023-12-02 12:23:51,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40bedd30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:23:51, skipping insertion in model container [2023-12-02 12:23:51,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:23:49" (2/3) ... [2023-12-02 12:23:51,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40bedd30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:23:51, skipping insertion in model container [2023-12-02 12:23:51,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:23:51" (3/3) ... [2023-12-02 12:23:51,283 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals.c [2023-12-02 12:23:51,301 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:23:51,301 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:23:51,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:23:51,352 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;@137e7002, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:23:51,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:23:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:51,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 12:23:51,363 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:51,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 12:23:51,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:51,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:51,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1385965980, now seen corresponding path program 1 times [2023-12-02 12:23:51,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:51,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031587846] [2023-12-02 12:23:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:51,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:53,405 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 12:23:53,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:53,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031587846] [2023-12-02 12:23:53,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031587846] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:53,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:53,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:23:53,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37531358] [2023-12-02 12:23:53,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:53,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:23:53,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:23:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:23:53,449 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:53,538 INFO L93 Difference]: Finished difference Result 33 states and 48 transitions. [2023-12-02 12:23:53,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:23:53,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 12:23:53,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:53,545 INFO L225 Difference]: With dead ends: 33 [2023-12-02 12:23:53,546 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 12:23:53,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:23:53,551 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:53,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:23:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 12:23:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2023-12-02 12:23:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-12-02 12:23:53,578 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2023-12-02 12:23:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:53,578 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-12-02 12:23:53,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-12-02 12:23:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 12:23:53,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:53,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:53,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:23:53,580 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:53,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash -284016958, now seen corresponding path program 1 times [2023-12-02 12:23:53,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:53,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82701580] [2023-12-02 12:23:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:53,987 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 12:23:53,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:53,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82701580] [2023-12-02 12:23:53,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82701580] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:53,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:53,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:23:53,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468904659] [2023-12-02 12:23:53,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:53,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:23:53,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:53,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:23:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:23:53,991 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:54,046 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-12-02 12:23:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:23:54,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 12:23:54,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:54,047 INFO L225 Difference]: With dead ends: 32 [2023-12-02 12:23:54,047 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 12:23:54,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:23:54,050 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:54,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:23:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 12:23:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2023-12-02 12:23:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 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 12:23:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-12-02 12:23:54,056 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2023-12-02 12:23:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:54,057 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-12-02 12:23:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-12-02 12:23:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 12:23:54,058 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:54,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:54,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:23:54,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:54,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash -285029852, now seen corresponding path program 1 times [2023-12-02 12:23:54,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:54,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982079543] [2023-12-02 12:23:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:54,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:55,306 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 12:23:55,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:55,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982079543] [2023-12-02 12:23:55,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982079543] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:55,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:55,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:23:55,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993914459] [2023-12-02 12:23:55,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:55,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:23:55,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:55,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:23:55,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:23:55,311 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:55,398 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2023-12-02 12:23:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:23:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 12:23:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:55,400 INFO L225 Difference]: With dead ends: 32 [2023-12-02 12:23:55,400 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 12:23:55,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:23:55,402 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:55,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:23:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 12:23:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2023-12-02 12:23:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:55,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-12-02 12:23:55,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2023-12-02 12:23:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:55,410 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-12-02 12:23:55,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:55,410 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-12-02 12:23:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 12:23:55,411 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:55,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:55,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:23:55,412 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:55,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash -256905373, now seen corresponding path program 1 times [2023-12-02 12:23:55,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:55,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444675758] [2023-12-02 12:23:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:55,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:57,029 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 12:23:57,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:57,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444675758] [2023-12-02 12:23:57,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444675758] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:57,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:57,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:23:57,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324574650] [2023-12-02 12:23:57,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:57,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:23:57,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:57,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:23:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:23:57,033 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:57,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:57,129 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-12-02 12:23:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:23:57,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 12:23:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:57,130 INFO L225 Difference]: With dead ends: 27 [2023-12-02 12:23:57,131 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 12:23:57,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:23:57,133 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:57,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:23:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 12:23:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2023-12-02 12:23:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-02 12:23:57,140 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2023-12-02 12:23:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:57,141 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-02 12:23:57,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:23:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-02 12:23:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 12:23:57,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:57,142 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:57,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:23:57,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:57,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:57,143 INFO L85 PathProgramCache]: Analyzing trace with hash -644134686, now seen corresponding path program 1 times [2023-12-02 12:23:57,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:57,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59745216] [2023-12-02 12:23:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:57,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:08,192 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 12:24:08,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:24:08,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59745216] [2023-12-02 12:24:08,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59745216] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:24:08,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732608083] [2023-12-02 12:24:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:08,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:08,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:24:08,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:24:08,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:24:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:08,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-02 12:24:08,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:24:21,723 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-12-02 12:24:24,935 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 12:24:24,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:27:32,199 WARN L293 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 426 DAG size of output: 773 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 12:35:12,080 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/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 12:35:12,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-12-02 12:35:12,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/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 12:35:12,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1655758865] [2023-12-02 12:35:12,100 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 12:35:12,101 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:35:12,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:35:12,108 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:35:12,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:35:12,133 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/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 12:35:12,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:35:12,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 12:35:12,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063567219] [2023-12-02 12:35:12,136 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 12:35:12,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:35:12,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:35:12,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:35:12,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:35:12,138 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:35:12,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:35:12,140 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 12:35:12,140 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 12:35:12,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:12,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:35:12,343 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_afcb6e01-2597-40c6-98ff-f976adda640d/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 12:35:12,345 INFO L158 Benchmark]: Toolchain (without parser) took 683266.63ms. Allocated memory was 178.3MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 146.1MB in the beginning and 605.4MB in the end (delta: -459.3MB). Peak memory consumption was 604.0MB. Max. memory is 16.1GB. [2023-12-02 12:35:12,345 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 119.5MB. Free memory is still 64.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:35:12,346 INFO L158 Benchmark]: CACSL2BoogieTranslator took 457.66ms. Allocated memory is still 178.3MB. Free memory was 145.9MB in the beginning and 128.2MB in the end (delta: 17.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-12-02 12:35:12,346 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.26ms. Allocated memory is still 178.3MB. Free memory was 128.2MB in the beginning and 125.3MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:35:12,347 INFO L158 Benchmark]: Boogie Preprocessor took 41.66ms. Allocated memory is still 178.3MB. Free memory was 125.3MB in the beginning and 122.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:35:12,347 INFO L158 Benchmark]: RCFGBuilder took 1630.02ms. Allocated memory is still 178.3MB. Free memory was 122.8MB in the beginning and 81.8MB in the end (delta: 41.0MB). Peak memory consumption was 76.6MB. Max. memory is 16.1GB. [2023-12-02 12:35:12,348 INFO L158 Benchmark]: TraceAbstraction took 681067.84ms. Allocated memory was 178.3MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 80.8MB in the beginning and 605.4MB in the end (delta: -524.6MB). Peak memory consumption was 535.8MB. Max. memory is 16.1GB. [2023-12-02 12:35:12,351 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 119.5MB. Free memory is still 64.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 457.66ms. Allocated memory is still 178.3MB. Free memory was 145.9MB in the beginning and 128.2MB in the end (delta: 17.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.26ms. Allocated memory is still 178.3MB. Free memory was 128.2MB in the beginning and 125.3MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.66ms. Allocated memory is still 178.3MB. Free memory was 125.3MB in the beginning and 122.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1630.02ms. Allocated memory is still 178.3MB. Free memory was 122.8MB in the beginning and 81.8MB in the end (delta: 41.0MB). Peak memory consumption was 76.6MB. Max. memory is 16.1GB. * TraceAbstraction took 681067.84ms. Allocated memory was 178.3MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 80.8MB in the beginning and 605.4MB in the end (delta: -524.6MB). Peak memory consumption was 535.8MB. 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_afcb6e01-2597-40c6-98ff-f976adda640d/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_afcb6e01-2597-40c6-98ff-f976adda640d/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_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/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_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/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_afcb6e01-2597-40c6-98ff-f976adda640d/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 760447de6aa5739f187553f004f72c898b25c540c6dba08996c9520ae7051de1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:35:14,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:35:14,361 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 12:35:14,367 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:35:14,368 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:35:14,399 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:35:14,399 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:35:14,400 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:35:14,401 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:35:14,402 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:35:14,402 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:35:14,403 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:35:14,404 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:35:14,404 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:35:14,405 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:35:14,405 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:35:14,406 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:35:14,407 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:35:14,408 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:35:14,408 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:35:14,409 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:35:14,410 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:35:14,410 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:35:14,411 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:35:14,411 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:35:14,412 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 12:35:14,412 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 12:35:14,412 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:35:14,413 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:35:14,413 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:35:14,414 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:35:14,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 12:35:14,414 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:35:14,415 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:35:14,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:35:14,415 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:35:14,416 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:35:14,416 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:35:14,416 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 12:35:14,416 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:14,417 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:35:14,417 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:35:14,418 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:35:14,418 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:35:14,418 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_afcb6e01-2597-40c6-98ff-f976adda640d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 760447de6aa5739f187553f004f72c898b25c540c6dba08996c9520ae7051de1 [2023-12-02 12:35:14,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:35:14,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:35:14,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:35:14,747 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:35:14,747 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:35:14,748 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c [2023-12-02 12:35:17,596 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:35:17,848 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:35:17,849 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c [2023-12-02 12:35:17,864 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/data/1fd018c8f/0ff47614c2454e43ac5b13eadf099f1a/FLAG431e51b58 [2023-12-02 12:35:17,880 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/data/1fd018c8f/0ff47614c2454e43ac5b13eadf099f1a [2023-12-02 12:35:17,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:35:17,884 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:35:17,886 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:35:17,886 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:35:17,892 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:35:17,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:35:17" (1/1) ... [2023-12-02 12:35:17,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e4dcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:17, skipping insertion in model container [2023-12-02 12:35:17,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:35:17" (1/1) ... [2023-12-02 12:35:17,956 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:35:18,232 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_afcb6e01-2597-40c6-98ff-f976adda640d/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c[20047,20060] [2023-12-02 12:35:18,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:35:18,255 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:35:18,326 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_afcb6e01-2597-40c6-98ff-f976adda640d/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.UNBOUNDED.pals.c[20047,20060] [2023-12-02 12:35:18,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:35:18,349 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:35:18,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18 WrapperNode [2023-12-02 12:35:18,350 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:35:18,351 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:35:18,351 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:35:18,351 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:35:18,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (1/1) ... [2023-12-02 12:35:18,376 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (1/1) ... [2023-12-02 12:35:18,410 INFO L138 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 428 [2023-12-02 12:35:18,411 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:35:18,412 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:35:18,412 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:35:18,412 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:35:18,423 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (1/1) ... [2023-12-02 12:35:18,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (1/1) ... [2023-12-02 12:35:18,429 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (1/1) ... [2023-12-02 12:35:18,429 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (1/1) ... [2023-12-02 12:35:18,442 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (1/1) ... [2023-12-02 12:35:18,450 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (1/1) ... [2023-12-02 12:35:18,453 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (1/1) ... [2023-12-02 12:35:18,456 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (1/1) ... [2023-12-02 12:35:18,461 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:35:18,462 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:35:18,462 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:35:18,463 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:35:18,464 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (1/1) ... [2023-12-02 12:35:18,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:35:18,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:35:18,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:35:18,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:35:18,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:35:18,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 12:35:18,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:35:18,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:35:18,695 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:35:18,698 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:35:19,246 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:35:19,293 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:35:19,294 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 12:35:19,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:35:19 BoogieIcfgContainer [2023-12-02 12:35:19,295 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:35:19,298 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:35:19,298 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:35:19,302 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:35:19,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:35:17" (1/3) ... [2023-12-02 12:35:19,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1360c782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:35:19, skipping insertion in model container [2023-12-02 12:35:19,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:35:18" (2/3) ... [2023-12-02 12:35:19,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1360c782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:35:19, skipping insertion in model container [2023-12-02 12:35:19,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:35:19" (3/3) ... [2023-12-02 12:35:19,305 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals.c [2023-12-02 12:35:19,321 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:35:19,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:35:19,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:35:19,381 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;@66dc7c69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:35:19,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:35:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 1.81651376146789) internal successors, (198), 110 states have internal predecessors, (198), 0 states have call successors, (0), 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 12:35:19,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 12:35:19,395 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:19,396 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] [2023-12-02 12:35:19,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:19,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash -697384584, now seen corresponding path program 1 times [2023-12-02 12:35:19,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:19,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406190144] [2023-12-02 12:35:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:19,427 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 12:35:19,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:19,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:19,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:19,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 12:35:19,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:19,592 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 12:35:19,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:19,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:19,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406190144] [2023-12-02 12:35:19,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406190144] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:19,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:19,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:35:19,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511444552] [2023-12-02 12:35:19,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:19,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 12:35:19,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:19,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 12:35:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 12:35:19,635 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 1.81651376146789) internal successors, (198), 110 states have internal predecessors, (198), 0 states have call successors, (0), 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 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 12:35:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:19,673 INFO L93 Difference]: Finished difference Result 167 states and 291 transitions. [2023-12-02 12:35:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 12:35:19,676 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2023-12-02 12:35:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:19,687 INFO L225 Difference]: With dead ends: 167 [2023-12-02 12:35:19,687 INFO L226 Difference]: Without dead ends: 109 [2023-12-02 12:35:19,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 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 12:35:19,694 INFO L413 NwaCegarLoop]: 190 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, 190 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 12:35:19,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 190 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-02 12:35:19,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-12-02 12:35:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.787037037037037) internal successors, (193), 108 states have internal predecessors, (193), 0 states have call successors, (0), 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 12:35:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 193 transitions. [2023-12-02 12:35:19,741 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 193 transitions. Word has length 24 [2023-12-02 12:35:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:19,742 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 193 transitions. [2023-12-02 12:35:19,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 12:35:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 193 transitions. [2023-12-02 12:35:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 12:35:19,744 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:19,744 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] [2023-12-02 12:35:19,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:19,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:19,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:19,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:19,946 INFO L85 PathProgramCache]: Analyzing trace with hash -274682758, now seen corresponding path program 1 times [2023-12-02 12:35:19,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:19,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721428976] [2023-12-02 12:35:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:19,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:35:19,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:19,949 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:19,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:20,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:35:20,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:20,097 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 12:35:20,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:20,097 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:20,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721428976] [2023-12-02 12:35:20,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721428976] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:20,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:20,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:35:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549933115] [2023-12-02 12:35:20,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:20,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:35:20,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:20,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:35:20,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:35:20,101 INFO L87 Difference]: Start difference. First operand 109 states and 193 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 12:35:20,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:20,195 INFO L93 Difference]: Finished difference Result 167 states and 285 transitions. [2023-12-02 12:35:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:35:20,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2023-12-02 12:35:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:20,198 INFO L225 Difference]: With dead ends: 167 [2023-12-02 12:35:20,198 INFO L226 Difference]: Without dead ends: 109 [2023-12-02 12:35:20,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 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 12:35:20,200 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 0 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:20,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 517 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:35:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-02 12:35:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-12-02 12:35:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3240740740740742) internal successors, (143), 108 states have internal predecessors, (143), 0 states have call successors, (0), 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 12:35:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2023-12-02 12:35:20,210 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 24 [2023-12-02 12:35:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:20,211 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2023-12-02 12:35:20,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 12:35:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2023-12-02 12:35:20,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 12:35:20,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:20,214 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] [2023-12-02 12:35:20,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:20,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:20,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:20,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:20,416 INFO L85 PathProgramCache]: Analyzing trace with hash 2067769244, now seen corresponding path program 1 times [2023-12-02 12:35:20,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:20,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394299713] [2023-12-02 12:35:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:20,417 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 12:35:20,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:20,418 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:20,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:20,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:20,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:22,373 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 12:35:22,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:22,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:22,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394299713] [2023-12-02 12:35:22,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394299713] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:22,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:22,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 12:35:22,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929453134] [2023-12-02 12:35:22,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:22,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:35:22,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:22,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:35:22,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:35:22,377 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 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 12:35:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:22,782 INFO L93 Difference]: Finished difference Result 549 states and 855 transitions. [2023-12-02 12:35:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:35:22,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2023-12-02 12:35:22,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:22,788 INFO L225 Difference]: With dead ends: 549 [2023-12-02 12:35:22,788 INFO L226 Difference]: Without dead ends: 494 [2023-12-02 12:35:22,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:35:22,791 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 873 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:22,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 878 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:35:22,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-12-02 12:35:22,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 215. [2023-12-02 12:35:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4766355140186915) internal successors, (316), 214 states have internal predecessors, (316), 0 states have call successors, (0), 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 12:35:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 316 transitions. [2023-12-02 12:35:22,819 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 316 transitions. Word has length 73 [2023-12-02 12:35:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:22,820 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 316 transitions. [2023-12-02 12:35:22,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 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 12:35:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 316 transitions. [2023-12-02 12:35:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 12:35:22,823 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:22,823 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] [2023-12-02 12:35:22,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:23,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:23,028 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:23,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2090732908, now seen corresponding path program 1 times [2023-12-02 12:35:23,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:23,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907592494] [2023-12-02 12:35:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:23,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:35:23,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:23,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:23,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:23,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:35:23,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:23,249 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 12:35:23,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:23,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:23,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907592494] [2023-12-02 12:35:23,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907592494] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:23,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:23,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:35:23,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089483410] [2023-12-02 12:35:23,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:23,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:23,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:23,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:35:23,253 INFO L87 Difference]: Start difference. First operand 215 states and 316 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 12:35:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:23,286 INFO L93 Difference]: Finished difference Result 521 states and 812 transitions. [2023-12-02 12:35:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2023-12-02 12:35:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:23,290 INFO L225 Difference]: With dead ends: 521 [2023-12-02 12:35:23,290 INFO L226 Difference]: Without dead ends: 360 [2023-12-02 12:35:23,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 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 12:35:23,293 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 60 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:23,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 217 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-12-02 12:35:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 355. [2023-12-02 12:35:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.5197740112994351) internal successors, (538), 354 states have internal predecessors, (538), 0 states have call successors, (0), 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 12:35:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 538 transitions. [2023-12-02 12:35:23,319 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 538 transitions. Word has length 75 [2023-12-02 12:35:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:23,320 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 538 transitions. [2023-12-02 12:35:23,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 12:35:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 538 transitions. [2023-12-02 12:35:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 12:35:23,324 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:23,324 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] [2023-12-02 12:35:23,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:23,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:23,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:23,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:23,529 INFO L85 PathProgramCache]: Analyzing trace with hash 440631821, now seen corresponding path program 1 times [2023-12-02 12:35:23,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:23,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69666142] [2023-12-02 12:35:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:23,530 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 12:35:23,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:23,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:23,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:23,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:35:23,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:23,670 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 12:35:23,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:23,670 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:23,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69666142] [2023-12-02 12:35:23,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69666142] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:23,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:23,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:35:23,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510077693] [2023-12-02 12:35:23,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:23,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:35:23,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:23,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:35:23,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:35:23,673 INFO L87 Difference]: Start difference. First operand 355 states and 538 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 12:35:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:23,726 INFO L93 Difference]: Finished difference Result 369 states and 555 transitions. [2023-12-02 12:35:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:35:23,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-12-02 12:35:23,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:23,730 INFO L225 Difference]: With dead ends: 369 [2023-12-02 12:35:23,730 INFO L226 Difference]: Without dead ends: 367 [2023-12-02 12:35:23,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 73 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 12:35:23,732 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:23,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 409 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:23,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-12-02 12:35:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2023-12-02 12:35:23,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.5055248618784531) internal successors, (545), 362 states have internal predecessors, (545), 0 states have call successors, (0), 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 12:35:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 545 transitions. [2023-12-02 12:35:23,748 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 545 transitions. Word has length 76 [2023-12-02 12:35:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:23,749 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 545 transitions. [2023-12-02 12:35:23,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 12:35:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 545 transitions. [2023-12-02 12:35:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 12:35:23,751 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:23,751 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] [2023-12-02 12:35:23,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:23,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:23,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:23,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:23,954 INFO L85 PathProgramCache]: Analyzing trace with hash 226592356, now seen corresponding path program 1 times [2023-12-02 12:35:23,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:23,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223614345] [2023-12-02 12:35:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:23,955 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 12:35:23,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:23,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:23,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:24,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:35:24,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:24,169 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 12:35:24,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:24,169 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:24,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223614345] [2023-12-02 12:35:24,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223614345] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:24,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:24,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:35:24,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405109856] [2023-12-02 12:35:24,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:24,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:24,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:35:24,172 INFO L87 Difference]: Start difference. First operand 363 states and 545 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:24,204 INFO L93 Difference]: Finished difference Result 957 states and 1485 transitions. [2023-12-02 12:35:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:24,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2023-12-02 12:35:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:24,210 INFO L225 Difference]: With dead ends: 957 [2023-12-02 12:35:24,210 INFO L226 Difference]: Without dead ends: 648 [2023-12-02 12:35:24,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 12:35:24,213 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 77 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:24,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 298 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2023-12-02 12:35:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 646. [2023-12-02 12:35:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.5302325581395348) internal successors, (987), 645 states have internal predecessors, (987), 0 states have call successors, (0), 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 12:35:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 987 transitions. [2023-12-02 12:35:24,240 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 987 transitions. Word has length 77 [2023-12-02 12:35:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:24,241 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 987 transitions. [2023-12-02 12:35:24,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 987 transitions. [2023-12-02 12:35:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 12:35:24,243 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:24,243 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] [2023-12-02 12:35:24,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:24,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:24,446 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:24,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:24,447 INFO L85 PathProgramCache]: Analyzing trace with hash -452377500, now seen corresponding path program 1 times [2023-12-02 12:35:24,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:24,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857573773] [2023-12-02 12:35:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:24,448 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 12:35:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:24,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:24,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:24,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:35:24,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:24,630 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 12:35:24,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:24,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857573773] [2023-12-02 12:35:24,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857573773] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:24,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:24,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:35:24,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058281071] [2023-12-02 12:35:24,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:24,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:24,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:24,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:24,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:35:24,633 INFO L87 Difference]: Start difference. First operand 646 states and 987 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:24,664 INFO L93 Difference]: Finished difference Result 1782 states and 2769 transitions. [2023-12-02 12:35:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:24,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2023-12-02 12:35:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:24,670 INFO L225 Difference]: With dead ends: 1782 [2023-12-02 12:35:24,670 INFO L226 Difference]: Without dead ends: 1190 [2023-12-02 12:35:24,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 12:35:24,672 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 73 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:24,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 294 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2023-12-02 12:35:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1188. [2023-12-02 12:35:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.535804549283909) internal successors, (1823), 1187 states have internal predecessors, (1823), 0 states have call successors, (0), 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 12:35:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1823 transitions. [2023-12-02 12:35:24,703 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1823 transitions. Word has length 77 [2023-12-02 12:35:24,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:24,703 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1823 transitions. [2023-12-02 12:35:24,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1823 transitions. [2023-12-02 12:35:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 12:35:24,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:24,704 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] [2023-12-02 12:35:24,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:24,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:24,905 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:24,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash -412433564, now seen corresponding path program 1 times [2023-12-02 12:35:24,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:24,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241523924] [2023-12-02 12:35:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:24,907 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 12:35:24,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:24,908 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:24,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:24,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:35:24,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:25,059 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 12:35:25,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:25,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:25,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241523924] [2023-12-02 12:35:25,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241523924] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:25,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:25,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:35:25,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551790028] [2023-12-02 12:35:25,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:25,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:25,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:35:25,062 INFO L87 Difference]: Start difference. First operand 1188 states and 1823 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:25,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:25,118 INFO L93 Difference]: Finished difference Result 3360 states and 5193 transitions. [2023-12-02 12:35:25,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:25,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2023-12-02 12:35:25,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:25,132 INFO L225 Difference]: With dead ends: 3360 [2023-12-02 12:35:25,132 INFO L226 Difference]: Without dead ends: 2226 [2023-12-02 12:35:25,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 12:35:25,134 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 71 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:25,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 296 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2023-12-02 12:35:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2224. [2023-12-02 12:35:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 1.5290148448043186) internal successors, (3399), 2223 states have internal predecessors, (3399), 0 states have call successors, (0), 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 12:35:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3399 transitions. [2023-12-02 12:35:25,211 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3399 transitions. Word has length 77 [2023-12-02 12:35:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:25,211 INFO L495 AbstractCegarLoop]: Abstraction has 2224 states and 3399 transitions. [2023-12-02 12:35:25,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3399 transitions. [2023-12-02 12:35:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 12:35:25,212 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:25,212 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] [2023-12-02 12:35:25,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:25,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:25,413 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:25,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:25,414 INFO L85 PathProgramCache]: Analyzing trace with hash -149356188, now seen corresponding path program 1 times [2023-12-02 12:35:25,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:25,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477288398] [2023-12-02 12:35:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:25,415 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 12:35:25,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:25,416 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:25,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:25,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:35:25,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:25,581 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 12:35:25,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:25,582 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:25,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477288398] [2023-12-02 12:35:25,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477288398] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:25,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:25,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:35:25,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769490787] [2023-12-02 12:35:25,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:25,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:25,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:25,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:35:25,584 INFO L87 Difference]: Start difference. First operand 2224 states and 3399 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:25,645 INFO L93 Difference]: Finished difference Result 6372 states and 9753 transitions. [2023-12-02 12:35:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:25,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2023-12-02 12:35:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:25,665 INFO L225 Difference]: With dead ends: 6372 [2023-12-02 12:35:25,665 INFO L226 Difference]: Without dead ends: 4202 [2023-12-02 12:35:25,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 12:35:25,669 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 67 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:25,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 292 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4202 states. [2023-12-02 12:35:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4202 to 4200. [2023-12-02 12:35:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 4199 states have (on average 1.5144081924267683) internal successors, (6359), 4199 states have internal predecessors, (6359), 0 states have call successors, (0), 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 12:35:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 6359 transitions. [2023-12-02 12:35:25,790 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 6359 transitions. Word has length 77 [2023-12-02 12:35:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:25,790 INFO L495 AbstractCegarLoop]: Abstraction has 4200 states and 6359 transitions. [2023-12-02 12:35:25,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 6359 transitions. [2023-12-02 12:35:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 12:35:25,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:25,792 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] [2023-12-02 12:35:25,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:25,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:25,993 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:25,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:25,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1038089628, now seen corresponding path program 1 times [2023-12-02 12:35:25,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:25,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811911611] [2023-12-02 12:35:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:25,994 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 12:35:25,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:25,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:25,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:26,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:35:26,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:26,168 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 12:35:26,168 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:26,168 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:26,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811911611] [2023-12-02 12:35:26,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811911611] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:26,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:26,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:35:26,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064903145] [2023-12-02 12:35:26,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:26,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:26,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:26,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:26,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:35:26,171 INFO L87 Difference]: Start difference. First operand 4200 states and 6359 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:26,299 INFO L93 Difference]: Finished difference Result 12108 states and 18297 transitions. [2023-12-02 12:35:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:26,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2023-12-02 12:35:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:26,345 INFO L225 Difference]: With dead ends: 12108 [2023-12-02 12:35:26,345 INFO L226 Difference]: Without dead ends: 7962 [2023-12-02 12:35:26,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 12:35:26,352 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 69 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:26,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 298 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7962 states. [2023-12-02 12:35:26,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7962 to 7960. [2023-12-02 12:35:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7960 states, 7959 states have (on average 1.4945344892574444) internal successors, (11895), 7959 states have internal predecessors, (11895), 0 states have call successors, (0), 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 12:35:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7960 states to 7960 states and 11895 transitions. [2023-12-02 12:35:26,651 INFO L78 Accepts]: Start accepts. Automaton has 7960 states and 11895 transitions. Word has length 77 [2023-12-02 12:35:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:26,651 INFO L495 AbstractCegarLoop]: Abstraction has 7960 states and 11895 transitions. [2023-12-02 12:35:26,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7960 states and 11895 transitions. [2023-12-02 12:35:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 12:35:26,653 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:26,653 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] [2023-12-02 12:35:26,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:26,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:26,854 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:26,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:26,854 INFO L85 PathProgramCache]: Analyzing trace with hash -183794332, now seen corresponding path program 1 times [2023-12-02 12:35:26,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:26,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867171476] [2023-12-02 12:35:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:26,855 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 12:35:26,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:26,856 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:26,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:26,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:35:26,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:26,995 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 12:35:26,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:26,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:26,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867171476] [2023-12-02 12:35:26,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867171476] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:26,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:26,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:35:26,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610602226] [2023-12-02 12:35:26,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:26,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:26,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:26,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:26,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:35:26,998 INFO L87 Difference]: Start difference. First operand 7960 states and 11895 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:27,183 INFO L93 Difference]: Finished difference Result 23004 states and 34233 transitions. [2023-12-02 12:35:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:27,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2023-12-02 12:35:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:27,239 INFO L225 Difference]: With dead ends: 23004 [2023-12-02 12:35:27,239 INFO L226 Difference]: Without dead ends: 15098 [2023-12-02 12:35:27,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 12:35:27,250 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 75 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:27,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 300 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:27,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15098 states. [2023-12-02 12:35:27,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15098 to 15096. [2023-12-02 12:35:27,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15096 states, 15095 states have (on average 1.470619410400795) internal successors, (22199), 15095 states have internal predecessors, (22199), 0 states have call successors, (0), 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 12:35:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15096 states to 15096 states and 22199 transitions. [2023-12-02 12:35:27,724 INFO L78 Accepts]: Start accepts. Automaton has 15096 states and 22199 transitions. Word has length 77 [2023-12-02 12:35:27,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:27,724 INFO L495 AbstractCegarLoop]: Abstraction has 15096 states and 22199 transitions. [2023-12-02 12:35:27,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 12:35:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 15096 states and 22199 transitions. [2023-12-02 12:35:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 12:35:27,725 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:27,725 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] [2023-12-02 12:35:27,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:27,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:27,926 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:27,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:27,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1082900329, now seen corresponding path program 1 times [2023-12-02 12:35:27,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:27,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019766413] [2023-12-02 12:35:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:27,927 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 12:35:27,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:27,928 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:27,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:27,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:35:28,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:28,064 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 12:35:28,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:28,064 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:28,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019766413] [2023-12-02 12:35:28,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019766413] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:28,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:28,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:35:28,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939535995] [2023-12-02 12:35:28,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:28,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:28,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:35:28,066 INFO L87 Difference]: Start difference. First operand 15096 states and 22199 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 12:35:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:28,296 INFO L93 Difference]: Finished difference Result 30463 states and 45245 transitions. [2023-12-02 12:35:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:28,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2023-12-02 12:35:28,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:28,340 INFO L225 Difference]: With dead ends: 30463 [2023-12-02 12:35:28,340 INFO L226 Difference]: Without dead ends: 22204 [2023-12-02 12:35:28,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 12:35:28,349 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 76 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:28,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 299 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22204 states. [2023-12-02 12:35:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22204 to 22202. [2023-12-02 12:35:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22202 states, 22201 states have (on average 1.4670059907211388) internal successors, (32569), 22201 states have internal predecessors, (32569), 0 states have call successors, (0), 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 12:35:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22202 states to 22202 states and 32569 transitions. [2023-12-02 12:35:28,966 INFO L78 Accepts]: Start accepts. Automaton has 22202 states and 32569 transitions. Word has length 79 [2023-12-02 12:35:28,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:28,966 INFO L495 AbstractCegarLoop]: Abstraction has 22202 states and 32569 transitions. [2023-12-02 12:35:28,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 12:35:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand 22202 states and 32569 transitions. [2023-12-02 12:35:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-02 12:35:28,970 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:28,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:28,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:29,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:29,174 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:29,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:29,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1694131117, now seen corresponding path program 1 times [2023-12-02 12:35:29,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:29,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88998384] [2023-12-02 12:35:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:29,175 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 12:35:29,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:29,176 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:29,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:29,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:35:29,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:29,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:29,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:29,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88998384] [2023-12-02 12:35:29,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88998384] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:29,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:35:29,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:35:29,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772164824] [2023-12-02 12:35:29,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:29,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:29,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:35:29,326 INFO L87 Difference]: Start difference. First operand 22202 states and 32569 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 12:35:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:29,550 INFO L93 Difference]: Finished difference Result 37589 states and 55443 transitions. [2023-12-02 12:35:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:29,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2023-12-02 12:35:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:29,569 INFO L225 Difference]: With dead ends: 37589 [2023-12-02 12:35:29,569 INFO L226 Difference]: Without dead ends: 15443 [2023-12-02 12:35:29,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 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 12:35:29,586 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 66 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:29,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 323 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15443 states. [2023-12-02 12:35:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15443 to 15441. [2023-12-02 12:35:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15441 states, 15440 states have (on average 1.472538860103627) internal successors, (22736), 15440 states have internal predecessors, (22736), 0 states have call successors, (0), 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 12:35:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15441 states to 15441 states and 22736 transitions. [2023-12-02 12:35:30,093 INFO L78 Accepts]: Start accepts. Automaton has 15441 states and 22736 transitions. Word has length 99 [2023-12-02 12:35:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:30,093 INFO L495 AbstractCegarLoop]: Abstraction has 15441 states and 22736 transitions. [2023-12-02 12:35:30,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 12:35:30,093 INFO L276 IsEmpty]: Start isEmpty. Operand 15441 states and 22736 transitions. [2023-12-02 12:35:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-02 12:35:30,098 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:30,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:30,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-12-02 12:35:30,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:30,299 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:30,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:30,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1656590734, now seen corresponding path program 1 times [2023-12-02 12:35:30,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:30,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342791287] [2023-12-02 12:35:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:30,300 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 12:35:30,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:30,301 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:30,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:30,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:35:30,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:31,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:31,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:31,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342791287] [2023-12-02 12:35:31,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342791287] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:31,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1745183982] [2023-12-02 12:35:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:31,958 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:31,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:31,961 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:31,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-12-02 12:35:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:32,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:35:32,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:32,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:32,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1745183982] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:32,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:35:32,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 8] total 17 [2023-12-02 12:35:32,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597505977] [2023-12-02 12:35:32,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:32,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:32,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:32,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:32,178 INFO L87 Difference]: Start difference. First operand 15441 states and 22736 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 12:35:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:32,275 INFO L93 Difference]: Finished difference Result 23125 states and 34066 transitions. [2023-12-02 12:35:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2023-12-02 12:35:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:32,283 INFO L225 Difference]: With dead ends: 23125 [2023-12-02 12:35:32,284 INFO L226 Difference]: Without dead ends: 7763 [2023-12-02 12:35:32,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:32,299 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 59 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:32,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 308 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7763 states. [2023-12-02 12:35:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7763 to 7761. [2023-12-02 12:35:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7761 states, 7760 states have (on average 1.4577319587628865) internal successors, (11312), 7760 states have internal predecessors, (11312), 0 states have call successors, (0), 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 12:35:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7761 states to 7761 states and 11312 transitions. [2023-12-02 12:35:32,428 INFO L78 Accepts]: Start accepts. Automaton has 7761 states and 11312 transitions. Word has length 101 [2023-12-02 12:35:32,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:32,429 INFO L495 AbstractCegarLoop]: Abstraction has 7761 states and 11312 transitions. [2023-12-02 12:35:32,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 12:35:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 7761 states and 11312 transitions. [2023-12-02 12:35:32,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 12:35:32,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:32,431 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:32,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:32,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:32,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:32,833 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:32,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:32,833 INFO L85 PathProgramCache]: Analyzing trace with hash 598201188, now seen corresponding path program 1 times [2023-12-02 12:35:32,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:32,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102524508] [2023-12-02 12:35:32,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:32,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:35:32,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:32,835 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:32,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:32,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:32,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:33,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:34,160 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:34,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102524508] [2023-12-02 12:35:34,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102524508] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:34,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1497197656] [2023-12-02 12:35:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:34,160 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:34,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:34,161 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:34,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-12-02 12:35:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:34,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:35:34,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:34,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:34,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1497197656] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:34,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:35:34,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 12:35:34,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246634271] [2023-12-02 12:35:34,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:34,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:34,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:34,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:34,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:34,356 INFO L87 Difference]: Start difference. First operand 7761 states and 11312 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 12:35:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:34,473 INFO L93 Difference]: Finished difference Result 11605 states and 16930 transitions. [2023-12-02 12:35:34,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:34,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2023-12-02 12:35:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:34,477 INFO L225 Difference]: With dead ends: 11605 [2023-12-02 12:35:34,477 INFO L226 Difference]: Without dead ends: 3923 [2023-12-02 12:35:34,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:34,481 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 56 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:34,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 293 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2023-12-02 12:35:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 3921. [2023-12-02 12:35:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 3920 states have (on average 1.4408163265306122) internal successors, (5648), 3920 states have internal predecessors, (5648), 0 states have call successors, (0), 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 12:35:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 5648 transitions. [2023-12-02 12:35:34,570 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 5648 transitions. Word has length 103 [2023-12-02 12:35:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:34,570 INFO L495 AbstractCegarLoop]: Abstraction has 3921 states and 5648 transitions. [2023-12-02 12:35:34,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 12:35:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 5648 transitions. [2023-12-02 12:35:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-02 12:35:34,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:34,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:34,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:34,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2023-12-02 12:35:34,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:34,973 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:34,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:34,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1793196330, now seen corresponding path program 1 times [2023-12-02 12:35:34,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:34,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362181631] [2023-12-02 12:35:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:34,975 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 12:35:34,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:34,976 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:34,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:35,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:35,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:35,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:36,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:36,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362181631] [2023-12-02 12:35:36,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362181631] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:36,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [843743096] [2023-12-02 12:35:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:36,395 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:36,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:36,396 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:36,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2023-12-02 12:35:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:36,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:35:36,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:36,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:36,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [843743096] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:36,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:35:36,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 12:35:36,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79999178] [2023-12-02 12:35:36,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:36,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:36,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:36,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:36,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:36,590 INFO L87 Difference]: Start difference. First operand 3921 states and 5648 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 12:35:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:36,640 INFO L93 Difference]: Finished difference Result 5845 states and 8434 transitions. [2023-12-02 12:35:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:36,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2023-12-02 12:35:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:36,643 INFO L225 Difference]: With dead ends: 5845 [2023-12-02 12:35:36,643 INFO L226 Difference]: Without dead ends: 2003 [2023-12-02 12:35:36,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:36,647 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 53 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:36,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 278 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2023-12-02 12:35:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 2001. [2023-12-02 12:35:36,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 1.42) internal successors, (2840), 2000 states have internal predecessors, (2840), 0 states have call successors, (0), 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 12:35:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 2840 transitions. [2023-12-02 12:35:36,713 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 2840 transitions. Word has length 105 [2023-12-02 12:35:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:36,714 INFO L495 AbstractCegarLoop]: Abstraction has 2001 states and 2840 transitions. [2023-12-02 12:35:36,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 12:35:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 2840 transitions. [2023-12-02 12:35:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 12:35:36,715 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:36,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:36,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:36,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2023-12-02 12:35:37,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:37,116 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:37,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:37,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1585626168, now seen corresponding path program 1 times [2023-12-02 12:35:37,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:37,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013461915] [2023-12-02 12:35:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:37,118 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 12:35:37,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:37,119 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:37,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:37,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:37,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:37,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:38,475 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:38,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013461915] [2023-12-02 12:35:38,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013461915] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:38,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [61990114] [2023-12-02 12:35:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:38,476 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:38,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:38,477 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:38,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-12-02 12:35:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:38,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:35:38,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:38,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:38,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [61990114] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:38,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:35:38,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 12:35:38,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405173790] [2023-12-02 12:35:38,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:38,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:38,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:38,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:38,649 INFO L87 Difference]: Start difference. First operand 2001 states and 2840 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 12:35:38,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:38,679 INFO L93 Difference]: Finished difference Result 2965 states and 4222 transitions. [2023-12-02 12:35:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:38,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2023-12-02 12:35:38,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:38,681 INFO L225 Difference]: With dead ends: 2965 [2023-12-02 12:35:38,681 INFO L226 Difference]: Without dead ends: 1043 [2023-12-02 12:35:38,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:38,683 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 50 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:38,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 263 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:38,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2023-12-02 12:35:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1041. [2023-12-02 12:35:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.3923076923076922) internal successors, (1448), 1040 states have internal predecessors, (1448), 0 states have call successors, (0), 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 12:35:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1448 transitions. [2023-12-02 12:35:38,705 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1448 transitions. Word has length 107 [2023-12-02 12:35:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:38,705 INFO L495 AbstractCegarLoop]: Abstraction has 1041 states and 1448 transitions. [2023-12-02 12:35:38,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 12:35:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1448 transitions. [2023-12-02 12:35:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 12:35:38,706 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:38,707 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:38,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:38,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2023-12-02 12:35:39,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:39,108 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:39,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:39,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1610903750, now seen corresponding path program 1 times [2023-12-02 12:35:39,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:39,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337619620] [2023-12-02 12:35:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:39,109 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 12:35:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:39,110 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:39,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:39,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:39,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:39,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:40,248 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:40,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337619620] [2023-12-02 12:35:40,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337619620] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:40,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [231550358] [2023-12-02 12:35:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:40,248 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:40,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:40,250 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:40,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2023-12-02 12:35:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:40,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:35:40,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:40,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:40,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [231550358] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:40,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:35:40,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 12:35:40,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203650926] [2023-12-02 12:35:40,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:40,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:40,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:40,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:40,440 INFO L87 Difference]: Start difference. First operand 1041 states and 1448 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 12:35:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:40,461 INFO L93 Difference]: Finished difference Result 1525 states and 2134 transitions. [2023-12-02 12:35:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:40,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2023-12-02 12:35:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:40,463 INFO L225 Difference]: With dead ends: 1525 [2023-12-02 12:35:40,463 INFO L226 Difference]: Without dead ends: 563 [2023-12-02 12:35:40,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:40,464 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 47 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:40,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 248 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2023-12-02 12:35:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 561. [2023-12-02 12:35:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.3535714285714286) internal successors, (758), 560 states have internal predecessors, (758), 0 states have call successors, (0), 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 12:35:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 758 transitions. [2023-12-02 12:35:40,473 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 758 transitions. Word has length 109 [2023-12-02 12:35:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:40,473 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 758 transitions. [2023-12-02 12:35:40,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 12:35:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 758 transitions. [2023-12-02 12:35:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-02 12:35:40,474 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:40,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:35:40,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2023-12-02 12:35:40,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:40,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:40,875 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:40,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2010382636, now seen corresponding path program 1 times [2023-12-02 12:35:40,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:40,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947362548] [2023-12-02 12:35:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:40,876 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 12:35:40,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:40,877 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:40,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-12-02 12:35:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:40,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:40,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:41,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:41,987 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:41,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947362548] [2023-12-02 12:35:41,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947362548] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:41,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1307127654] [2023-12-02 12:35:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:41,987 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:41,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:41,989 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:41,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-12-02 12:35:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:42,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:35:42,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:42,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:42,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1307127654] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:42,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:35:42,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 12:35:42,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529336383] [2023-12-02 12:35:42,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:42,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:35:42,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:42,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:35:42,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:42,171 INFO L87 Difference]: Start difference. First operand 561 states and 758 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 12:35:42,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:42,188 INFO L93 Difference]: Finished difference Result 805 states and 1099 transitions. [2023-12-02 12:35:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:35:42,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2023-12-02 12:35:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:42,189 INFO L225 Difference]: With dead ends: 805 [2023-12-02 12:35:42,189 INFO L226 Difference]: Without dead ends: 323 [2023-12-02 12:35:42,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:35:42,190 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 44 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:42,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 233 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:35:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-12-02 12:35:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2023-12-02 12:35:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.3) internal successors, (416), 320 states have internal predecessors, (416), 0 states have call successors, (0), 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 12:35:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 416 transitions. [2023-12-02 12:35:42,196 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 416 transitions. Word has length 111 [2023-12-02 12:35:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:42,196 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 416 transitions. [2023-12-02 12:35:42,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 12:35:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 416 transitions. [2023-12-02 12:35:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 12:35:42,197 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:42,197 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:35:42,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-12-02 12:35:42,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:42,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:42,598 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:42,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:42,598 INFO L85 PathProgramCache]: Analyzing trace with hash 128563614, now seen corresponding path program 1 times [2023-12-02 12:35:42,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:42,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669125119] [2023-12-02 12:35:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:42,599 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 12:35:42,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:42,600 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:42,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-12-02 12:35:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:42,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:42,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:43,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:43,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:43,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669125119] [2023-12-02 12:35:43,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669125119] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:43,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [14942531] [2023-12-02 12:35:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:43,690 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:43,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:43,691 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:43,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2023-12-02 12:35:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:43,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:43,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:35:45,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:45,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [14942531] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:45,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:35:45,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 23 [2023-12-02 12:35:45,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308856795] [2023-12-02 12:35:45,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:45,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:35:45,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:45,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:35:45,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:35:45,622 INFO L87 Difference]: Start difference. First operand 321 states and 416 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 12:35:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:45,892 INFO L93 Difference]: Finished difference Result 977 states and 1330 transitions. [2023-12-02 12:35:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:35:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 113 [2023-12-02 12:35:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:45,893 INFO L225 Difference]: With dead ends: 977 [2023-12-02 12:35:45,893 INFO L226 Difference]: Without dead ends: 895 [2023-12-02 12:35:45,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:35:45,894 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 909 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:45,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 841 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:35:45,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2023-12-02 12:35:45,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 481. [2023-12-02 12:35:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.3166666666666667) internal successors, (632), 480 states have internal predecessors, (632), 0 states have call successors, (0), 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 12:35:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 632 transitions. [2023-12-02 12:35:45,903 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 632 transitions. Word has length 113 [2023-12-02 12:35:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:45,903 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 632 transitions. [2023-12-02 12:35:45,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 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 12:35:45,903 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 632 transitions. [2023-12-02 12:35:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 12:35:45,904 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:45,904 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:35:45,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2023-12-02 12:35:46,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-12-02 12:35:46,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:46,304 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:46,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:46,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1969987426, now seen corresponding path program 1 times [2023-12-02 12:35:46,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:46,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255628737] [2023-12-02 12:35:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:46,305 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 12:35:46,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:46,306 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:46,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-12-02 12:35:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:46,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:46,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:46,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:47,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:47,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255628737] [2023-12-02 12:35:47,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255628737] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:47,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1092409623] [2023-12-02 12:35:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:47,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:47,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:47,356 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:47,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-12-02 12:35:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:47,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:47,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:35:49,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:49,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1092409623] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:49,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:35:49,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 23 [2023-12-02 12:35:49,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23445335] [2023-12-02 12:35:49,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:49,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:35:49,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:35:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:35:49,397 INFO L87 Difference]: Start difference. First operand 481 states and 632 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 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 12:35:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:49,718 INFO L93 Difference]: Finished difference Result 1057 states and 1438 transitions. [2023-12-02 12:35:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:35:49,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 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 113 [2023-12-02 12:35:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:49,720 INFO L225 Difference]: With dead ends: 1057 [2023-12-02 12:35:49,720 INFO L226 Difference]: Without dead ends: 975 [2023-12-02 12:35:49,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:35:49,722 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 909 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:49,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 873 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:35:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2023-12-02 12:35:49,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 561. [2023-12-02 12:35:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.3214285714285714) internal successors, (740), 560 states have internal predecessors, (740), 0 states have call successors, (0), 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 12:35:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 740 transitions. [2023-12-02 12:35:49,739 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 740 transitions. Word has length 113 [2023-12-02 12:35:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:49,739 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 740 transitions. [2023-12-02 12:35:49,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 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 12:35:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 740 transitions. [2023-12-02 12:35:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 12:35:49,740 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:49,741 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:35:49,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-12-02 12:35:49,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2023-12-02 12:35:50,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:50,141 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:50,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:50,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1096084894, now seen corresponding path program 1 times [2023-12-02 12:35:50,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:50,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674015607] [2023-12-02 12:35:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:50,142 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 12:35:50,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:50,143 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:50,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-12-02 12:35:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:50,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:50,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:50,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:51,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:51,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674015607] [2023-12-02 12:35:51,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674015607] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:51,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1540588885] [2023-12-02 12:35:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:51,254 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:51,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:51,255 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:51,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2023-12-02 12:35:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:51,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:51,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:35:53,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:53,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1540588885] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:53,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:35:53,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 23 [2023-12-02 12:35:53,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222948781] [2023-12-02 12:35:53,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:53,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:35:53,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:53,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:35:53,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:35:53,228 INFO L87 Difference]: Start difference. First operand 561 states and 740 transitions. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 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 12:35:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:53,547 INFO L93 Difference]: Finished difference Result 1137 states and 1546 transitions. [2023-12-02 12:35:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:35:53,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 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 113 [2023-12-02 12:35:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:53,549 INFO L225 Difference]: With dead ends: 1137 [2023-12-02 12:35:53,549 INFO L226 Difference]: Without dead ends: 895 [2023-12-02 12:35:53,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:35:53,550 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 649 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:53,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 1020 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:35:53,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2023-12-02 12:35:53,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 481. [2023-12-02 12:35:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.3041666666666667) internal successors, (626), 480 states have internal predecessors, (626), 0 states have call successors, (0), 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 12:35:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 626 transitions. [2023-12-02 12:35:53,562 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 626 transitions. Word has length 113 [2023-12-02 12:35:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:53,562 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 626 transitions. [2023-12-02 12:35:53,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 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 12:35:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 626 transitions. [2023-12-02 12:35:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 12:35:53,563 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:53,563 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:35:53,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:53,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:53,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:53,964 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:53,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1893880734, now seen corresponding path program 1 times [2023-12-02 12:35:53,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:53,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859146908] [2023-12-02 12:35:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:53,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:35:53,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:53,965 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:53,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-12-02 12:35:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:54,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:54,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:54,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:55,064 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:55,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859146908] [2023-12-02 12:35:55,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859146908] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:55,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1190549201] [2023-12-02 12:35:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:55,065 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:55,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:55,066 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:55,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-12-02 12:35:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:55,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:55,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 12:35:57,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:35:57,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1190549201] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:35:57,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:35:57,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 23 [2023-12-02 12:35:57,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252071731] [2023-12-02 12:35:57,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:35:57,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:35:57,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:35:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:35:57,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:35:57,081 INFO L87 Difference]: Start difference. First operand 481 states and 626 transitions. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 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 12:35:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:35:57,388 INFO L93 Difference]: Finished difference Result 1057 states and 1432 transitions. [2023-12-02 12:35:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:35:57,388 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 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 113 [2023-12-02 12:35:57,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:35:57,389 INFO L225 Difference]: With dead ends: 1057 [2023-12-02 12:35:57,389 INFO L226 Difference]: Without dead ends: 975 [2023-12-02 12:35:57,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:35:57,390 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 630 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:35:57,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1056 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:35:57,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2023-12-02 12:35:57,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 561. [2023-12-02 12:35:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.3107142857142857) internal successors, (734), 560 states have internal predecessors, (734), 0 states have call successors, (0), 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 12:35:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 734 transitions. [2023-12-02 12:35:57,401 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 734 transitions. Word has length 113 [2023-12-02 12:35:57,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:35:57,401 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 734 transitions. [2023-12-02 12:35:57,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 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 12:35:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 734 transitions. [2023-12-02 12:35:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 12:35:57,402 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:35:57,402 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:35:57,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2023-12-02 12:35:57,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2023-12-02 12:35:57,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:57,803 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:35:57,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:35:57,803 INFO L85 PathProgramCache]: Analyzing trace with hash -922827106, now seen corresponding path program 1 times [2023-12-02 12:35:57,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:35:57,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133215603] [2023-12-02 12:35:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:57,803 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 12:35:57,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:35:57,804 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:35:57,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-12-02 12:35:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:57,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:57,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:35:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:58,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:35:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:35:58,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:35:58,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133215603] [2023-12-02 12:35:58,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133215603] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:35:58,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945735706] [2023-12-02 12:35:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:35:58,848 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:35:58,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:35:58,849 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:35:58,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-02 12:35:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:35:58,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:35:58,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:36:00,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:36:00,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945735706] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:36:00,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:36:00,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 23 [2023-12-02 12:36:00,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370859165] [2023-12-02 12:36:00,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:36:00,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:36:00,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:00,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:36:00,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:36:00,865 INFO L87 Difference]: Start difference. First operand 561 states and 734 transitions. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 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 12:36:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:01,158 INFO L93 Difference]: Finished difference Result 1137 states and 1540 transitions. [2023-12-02 12:36:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:36:01,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 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 113 [2023-12-02 12:36:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:01,159 INFO L225 Difference]: With dead ends: 1137 [2023-12-02 12:36:01,159 INFO L226 Difference]: Without dead ends: 1055 [2023-12-02 12:36:01,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:36:01,161 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 631 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:01,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 961 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:36:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2023-12-02 12:36:01,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 641. [2023-12-02 12:36:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 1.315625) internal successors, (842), 640 states have internal predecessors, (842), 0 states have call successors, (0), 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 12:36:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 842 transitions. [2023-12-02 12:36:01,178 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 842 transitions. Word has length 113 [2023-12-02 12:36:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:01,179 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 842 transitions. [2023-12-02 12:36:01,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 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 12:36:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 842 transitions. [2023-12-02 12:36:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 12:36:01,180 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:01,180 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:36:01,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:01,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:01,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:01,581 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:36:01,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:01,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1101212830, now seen corresponding path program 1 times [2023-12-02 12:36:01,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:01,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052502303] [2023-12-02 12:36:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:01,582 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 12:36:01,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:01,583 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:01,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2023-12-02 12:36:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:01,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:36:01,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:02,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:02,571 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:02,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052502303] [2023-12-02 12:36:02,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052502303] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:02,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [605551043] [2023-12-02 12:36:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:02,571 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:02,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:02,572 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:02,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2023-12-02 12:36:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:02,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:36:02,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:36:04,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:36:04,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [605551043] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:36:04,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:36:04,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 23 [2023-12-02 12:36:04,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465822418] [2023-12-02 12:36:04,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:36:04,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:36:04,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:36:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:36:04,614 INFO L87 Difference]: Start difference. First operand 641 states and 842 transitions. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 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 12:36:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:04,895 INFO L93 Difference]: Finished difference Result 1217 states and 1648 transitions. [2023-12-02 12:36:04,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:36:04,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 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 113 [2023-12-02 12:36:04,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:04,897 INFO L225 Difference]: With dead ends: 1217 [2023-12-02 12:36:04,897 INFO L226 Difference]: Without dead ends: 1135 [2023-12-02 12:36:04,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:36:04,898 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 742 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:04,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 988 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:36:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2023-12-02 12:36:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 721. [2023-12-02 12:36:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.3194444444444444) internal successors, (950), 720 states have internal predecessors, (950), 0 states have call successors, (0), 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 12:36:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 950 transitions. [2023-12-02 12:36:04,915 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 950 transitions. Word has length 113 [2023-12-02 12:36:04,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:04,915 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 950 transitions. [2023-12-02 12:36:04,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 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 12:36:04,915 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 950 transitions. [2023-12-02 12:36:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 12:36:04,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:04,916 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:36:04,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2023-12-02 12:36:05,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2023-12-02 12:36:05,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:05,316 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:36:05,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:05,317 INFO L85 PathProgramCache]: Analyzing trace with hash 732635038, now seen corresponding path program 1 times [2023-12-02 12:36:05,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:05,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975216346] [2023-12-02 12:36:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:05,317 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 12:36:05,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:05,318 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:05,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2023-12-02 12:36:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:05,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:36:05,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:06,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:06,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:06,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975216346] [2023-12-02 12:36:06,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975216346] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:06,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1731770752] [2023-12-02 12:36:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:06,388 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:06,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:06,389 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:06,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2023-12-02 12:36:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:06,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:36:06,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:36:08,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:36:08,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1731770752] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:36:08,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:36:08,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 8] total 23 [2023-12-02 12:36:08,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951770012] [2023-12-02 12:36:08,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:36:08,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:36:08,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:08,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:36:08,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:36:08,332 INFO L87 Difference]: Start difference. First operand 721 states and 950 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 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 12:36:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:08,578 INFO L93 Difference]: Finished difference Result 1297 states and 1756 transitions. [2023-12-02 12:36:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:36:08,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 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 113 [2023-12-02 12:36:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:08,580 INFO L225 Difference]: With dead ends: 1297 [2023-12-02 12:36:08,580 INFO L226 Difference]: Without dead ends: 1215 [2023-12-02 12:36:08,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:36:08,581 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 676 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:08,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 996 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:36:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2023-12-02 12:36:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 801. [2023-12-02 12:36:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.3225) internal successors, (1058), 800 states have internal predecessors, (1058), 0 states have call successors, (0), 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 12:36:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1058 transitions. [2023-12-02 12:36:08,600 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1058 transitions. Word has length 113 [2023-12-02 12:36:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:08,601 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1058 transitions. [2023-12-02 12:36:08,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 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 12:36:08,601 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1058 transitions. [2023-12-02 12:36:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 12:36:08,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:08,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:36:08,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2023-12-02 12:36:08,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:09,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:09,002 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:36:09,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:09,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1425826366, now seen corresponding path program 1 times [2023-12-02 12:36:09,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:09,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215421852] [2023-12-02 12:36:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:09,004 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 12:36:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:09,005 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:09,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2023-12-02 12:36:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:09,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:36:09,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:09,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:10,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:10,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215421852] [2023-12-02 12:36:10,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215421852] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:10,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1233561399] [2023-12-02 12:36:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:10,129 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:10,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:10,130 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:10,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2023-12-02 12:36:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:10,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:36:10,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:36:10,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:36:10,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1233561399] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:10,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687206526] [2023-12-02 12:36:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:10,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:10,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:36:10,579 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:36:10,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 12:36:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:10,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:36:10,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:36:10,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:11,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687206526] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:11,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:36:11,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4, 4, 4, 5] total 21 [2023-12-02 12:36:11,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219088264] [2023-12-02 12:36:11,094 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:36:11,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 12:36:11,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:11,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 12:36:11,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-12-02 12:36:11,096 INFO L87 Difference]: Start difference. First operand 801 states and 1058 transitions. Second operand has 21 states, 21 states have (on average 22.952380952380953) internal successors, (482), 21 states have internal predecessors, (482), 0 states have call successors, (0), 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 12:36:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:12,750 INFO L93 Difference]: Finished difference Result 3359 states and 4483 transitions. [2023-12-02 12:36:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 12:36:12,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 22.952380952380953) internal successors, (482), 21 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-12-02 12:36:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:12,752 INFO L225 Difference]: With dead ends: 3359 [2023-12-02 12:36:12,752 INFO L226 Difference]: Without dead ends: 2637 [2023-12-02 12:36:12,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 658 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=505, Invalid=1657, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 12:36:12,754 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 1831 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1831 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:12,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1831 Valid, 697 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 12:36:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2023-12-02 12:36:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2603. [2023-12-02 12:36:12,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 1.2897770945426594) internal successors, (3356), 2602 states have internal predecessors, (3356), 0 states have call successors, (0), 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 12:36:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 3356 transitions. [2023-12-02 12:36:12,834 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 3356 transitions. Word has length 114 [2023-12-02 12:36:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:12,834 INFO L495 AbstractCegarLoop]: Abstraction has 2603 states and 3356 transitions. [2023-12-02 12:36:12,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.952380952380953) internal successors, (482), 21 states have internal predecessors, (482), 0 states have call successors, (0), 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 12:36:12,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 3356 transitions. [2023-12-02 12:36:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 12:36:12,835 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:12,835 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:36:12,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:13,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-12-02 12:36:13,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2023-12-02 12:36:13,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:13,436 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:36:13,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1734001908, now seen corresponding path program 1 times [2023-12-02 12:36:13,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:13,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141114652] [2023-12-02 12:36:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:13,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:36:13,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:13,438 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:13,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2023-12-02 12:36:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:13,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:36:13,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:14,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:14,515 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:14,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141114652] [2023-12-02 12:36:14,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141114652] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:14,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [641278308] [2023-12-02 12:36:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:14,515 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:14,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:14,516 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:14,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2023-12-02 12:36:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:14,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:36:14,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:15,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:15,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [641278308] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:15,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502019887] [2023-12-02 12:36:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:15,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:15,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:36:15,953 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:36:15,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 12:36:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:16,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:36:16,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:17,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:17,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502019887] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:17,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:36:17,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 8] total 37 [2023-12-02 12:36:17,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280020820] [2023-12-02 12:36:17,294 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:36:17,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 12:36:17,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:17,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 12:36:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 12:36:17,296 INFO L87 Difference]: Start difference. First operand 2603 states and 3356 transitions. Second operand has 37 states, 37 states have (on average 12.35135135135135) internal successors, (457), 37 states have internal predecessors, (457), 0 states have call successors, (0), 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 12:36:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:20,812 INFO L93 Difference]: Finished difference Result 7033 states and 9047 transitions. [2023-12-02 12:36:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-02 12:36:20,813 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 12.35135135135135) internal successors, (457), 37 states have internal predecessors, (457), 0 states have call successors, (0), 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 12:36:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:20,816 INFO L225 Difference]: With dead ends: 7033 [2023-12-02 12:36:20,816 INFO L226 Difference]: Without dead ends: 4591 [2023-12-02 12:36:20,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 648 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=759, Invalid=3273, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 12:36:20,819 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1899 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:20,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1899 Valid, 1398 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 12:36:20,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2023-12-02 12:36:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 4525. [2023-12-02 12:36:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4525 states, 4524 states have (on average 1.268788682581786) internal successors, (5740), 4524 states have internal predecessors, (5740), 0 states have call successors, (0), 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 12:36:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4525 states to 4525 states and 5740 transitions. [2023-12-02 12:36:20,990 INFO L78 Accepts]: Start accepts. Automaton has 4525 states and 5740 transitions. Word has length 115 [2023-12-02 12:36:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:20,990 INFO L495 AbstractCegarLoop]: Abstraction has 4525 states and 5740 transitions. [2023-12-02 12:36:20,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 12.35135135135135) internal successors, (457), 37 states have internal predecessors, (457), 0 states have call successors, (0), 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 12:36:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states and 5740 transitions. [2023-12-02 12:36:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 12:36:20,991 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:20,991 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:36:20,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2023-12-02 12:36:21,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2023-12-02 12:36:21,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 12:36:21,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:21,592 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:36:21,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:21,592 INFO L85 PathProgramCache]: Analyzing trace with hash -760156672, now seen corresponding path program 1 times [2023-12-02 12:36:21,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:21,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093632764] [2023-12-02 12:36:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:21,593 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 12:36:21,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:21,594 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:21,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2023-12-02 12:36:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:21,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:36:21,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:22,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:22,770 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:22,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093632764] [2023-12-02 12:36:22,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093632764] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:22,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [807780580] [2023-12-02 12:36:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:22,770 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:22,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:22,771 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:22,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2023-12-02 12:36:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:22,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:36:22,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:23,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:24,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [807780580] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:24,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671722087] [2023-12-02 12:36:24,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:24,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:24,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:36:24,230 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:36:24,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 12:36:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:24,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:36:24,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:25,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:25,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671722087] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:25,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:36:25,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 12:36:25,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335121205] [2023-12-02 12:36:25,720 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:36:25,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 12:36:25,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:25,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 12:36:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 12:36:25,722 INFO L87 Difference]: Start difference. First operand 4525 states and 5740 transitions. Second operand has 37 states, 37 states have (on average 13.702702702702704) internal successors, (507), 37 states have internal predecessors, (507), 0 states have call successors, (0), 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 12:36:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:30,679 INFO L93 Difference]: Finished difference Result 15290 states and 19511 transitions. [2023-12-02 12:36:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 12:36:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 13.702702702702704) internal successors, (507), 37 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-12-02 12:36:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:30,685 INFO L225 Difference]: With dead ends: 15290 [2023-12-02 12:36:30,685 INFO L226 Difference]: Without dead ends: 10998 [2023-12-02 12:36:30,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=782, Invalid=3508, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 12:36:30,689 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1812 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:30,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1812 Valid, 1754 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 12:36:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10998 states. [2023-12-02 12:36:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10998 to 8559. [2023-12-02 12:36:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8559 states, 8558 states have (on average 1.251226922178079) internal successors, (10708), 8558 states have internal predecessors, (10708), 0 states have call successors, (0), 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 12:36:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8559 states to 8559 states and 10708 transitions. [2023-12-02 12:36:31,041 INFO L78 Accepts]: Start accepts. Automaton has 8559 states and 10708 transitions. Word has length 116 [2023-12-02 12:36:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:31,042 INFO L495 AbstractCegarLoop]: Abstraction has 8559 states and 10708 transitions. [2023-12-02 12:36:31,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 13.702702702702704) internal successors, (507), 37 states have internal predecessors, (507), 0 states have call successors, (0), 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 12:36:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 8559 states and 10708 transitions. [2023-12-02 12:36:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-02 12:36:31,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:31,043 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:36:31,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:31,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:31,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2023-12-02 12:36:31,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:31,644 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:36:31,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1860616956, now seen corresponding path program 1 times [2023-12-02 12:36:31,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:31,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370443664] [2023-12-02 12:36:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:31,645 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 12:36:31,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:31,646 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:31,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2023-12-02 12:36:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:31,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:36:31,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:32,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:32,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:32,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370443664] [2023-12-02 12:36:32,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370443664] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:32,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [48704782] [2023-12-02 12:36:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:32,927 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:32,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:32,928 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:32,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2023-12-02 12:36:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:33,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:36:33,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:34,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:34,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [48704782] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:34,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924309500] [2023-12-02 12:36:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:34,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:34,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:36:34,461 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:36:34,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 12:36:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:34,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 12:36:34,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:35,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:35,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924309500] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:35,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:36:35,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 12:36:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546440040] [2023-12-02 12:36:35,983 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:36:35,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 12:36:35,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 12:36:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 12:36:35,987 INFO L87 Difference]: Start difference. First operand 8559 states and 10708 transitions. Second operand has 37 states, 37 states have (on average 14.108108108108109) internal successors, (522), 37 states have internal predecessors, (522), 0 states have call successors, (0), 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 12:36:41,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:41,093 INFO L93 Difference]: Finished difference Result 28783 states and 36129 transitions. [2023-12-02 12:36:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 12:36:41,094 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 14.108108108108109) internal successors, (522), 37 states have internal predecessors, (522), 0 states have call successors, (0), 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 117 [2023-12-02 12:36:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:41,114 INFO L225 Difference]: With dead ends: 28783 [2023-12-02 12:36:41,114 INFO L226 Difference]: Without dead ends: 20331 [2023-12-02 12:36:41,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=782, Invalid=3508, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 12:36:41,124 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 1737 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:41,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1737 Valid, 1642 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 12:36:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20331 states. [2023-12-02 12:36:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20331 to 16125. [2023-12-02 12:36:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16125 states, 16124 states have (on average 1.228045150086827) internal successors, (19801), 16124 states have internal predecessors, (19801), 0 states have call successors, (0), 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 12:36:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 19801 transitions. [2023-12-02 12:36:42,036 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 19801 transitions. Word has length 117 [2023-12-02 12:36:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:42,036 INFO L495 AbstractCegarLoop]: Abstraction has 16125 states and 19801 transitions. [2023-12-02 12:36:42,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 14.108108108108109) internal successors, (522), 37 states have internal predecessors, (522), 0 states have call successors, (0), 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 12:36:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 19801 transitions. [2023-12-02 12:36:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-02 12:36:42,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:42,038 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:36:42,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:42,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:42,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2023-12-02 12:36:42,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:42,639 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:36:42,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:42,639 INFO L85 PathProgramCache]: Analyzing trace with hash 607738384, now seen corresponding path program 1 times [2023-12-02 12:36:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:42,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419797058] [2023-12-02 12:36:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:42,640 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 12:36:42,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:42,641 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:42,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2023-12-02 12:36:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:42,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:36:42,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:43,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:43,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:43,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419797058] [2023-12-02 12:36:43,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419797058] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:43,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1552816376] [2023-12-02 12:36:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:43,955 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:43,956 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:43,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2023-12-02 12:36:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:44,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:36:44,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:44,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:45,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1552816376] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:45,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557016532] [2023-12-02 12:36:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:45,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:45,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:36:45,463 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:36:45,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-02 12:36:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:45,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 12:36:45,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:46,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:47,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557016532] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:47,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:36:47,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 12:36:47,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954191433] [2023-12-02 12:36:47,120 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:36:47,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 12:36:47,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:47,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 12:36:47,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 12:36:47,123 INFO L87 Difference]: Start difference. First operand 16125 states and 19801 transitions. Second operand has 37 states, 37 states have (on average 14.486486486486486) internal successors, (536), 37 states have internal predecessors, (536), 0 states have call successors, (0), 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 12:36:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:36:52,629 INFO L93 Difference]: Finished difference Result 52139 states and 64078 transitions. [2023-12-02 12:36:52,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 12:36:52,630 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 14.486486486486486) internal successors, (536), 37 states have internal predecessors, (536), 0 states have call successors, (0), 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 12:36:52,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:36:52,657 INFO L225 Difference]: With dead ends: 52139 [2023-12-02 12:36:52,658 INFO L226 Difference]: Without dead ends: 36829 [2023-12-02 12:36:52,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=782, Invalid=3508, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 12:36:52,669 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 1379 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:36:52,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1379 Valid, 1380 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 12:36:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36829 states. [2023-12-02 12:36:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36829 to 30169. [2023-12-02 12:36:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30169 states, 30168 states have (on average 1.2105210819411296) internal successors, (36519), 30168 states have internal predecessors, (36519), 0 states have call successors, (0), 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 12:36:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30169 states to 30169 states and 36519 transitions. [2023-12-02 12:36:54,409 INFO L78 Accepts]: Start accepts. Automaton has 30169 states and 36519 transitions. Word has length 118 [2023-12-02 12:36:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:36:54,409 INFO L495 AbstractCegarLoop]: Abstraction has 30169 states and 36519 transitions. [2023-12-02 12:36:54,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 14.486486486486486) internal successors, (536), 37 states have internal predecessors, (536), 0 states have call successors, (0), 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 12:36:54,410 INFO L276 IsEmpty]: Start isEmpty. Operand 30169 states and 36519 transitions. [2023-12-02 12:36:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 12:36:54,411 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:36:54,411 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:36:54,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2023-12-02 12:36:54,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2023-12-02 12:36:54,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-12-02 12:36:55,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:55,012 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:36:55,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:36:55,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1028633108, now seen corresponding path program 1 times [2023-12-02 12:36:55,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:36:55,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333705685] [2023-12-02 12:36:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:55,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 12:36:55,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:36:55,015 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:36:55,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2023-12-02 12:36:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:55,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:36:55,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:55,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:56,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:36:56,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333705685] [2023-12-02 12:36:56,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333705685] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:56,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1702945610] [2023-12-02 12:36:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:56,362 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:36:56,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:36:56,363 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:36:56,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2023-12-02 12:36:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:56,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:36:56,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:57,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:58,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1702945610] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:58,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391551781] [2023-12-02 12:36:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:36:58,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:36:58,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:36:58,173 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:36:58,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-12-02 12:36:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:36:58,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 12:36:58,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:36:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:59,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:36:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:36:59,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391551781] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:36:59,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 12:36:59,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 12:36:59,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125160014] [2023-12-02 12:36:59,765 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 12:36:59,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 12:36:59,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 12:36:59,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 12:36:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 12:36:59,767 INFO L87 Difference]: Start difference. First operand 30169 states and 36519 transitions. Second operand has 37 states, 37 states have (on average 14.837837837837839) internal successors, (549), 37 states have internal predecessors, (549), 0 states have call successors, (0), 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 12:37:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:37:07,503 INFO L93 Difference]: Finished difference Result 93023 states and 112386 transitions. [2023-12-02 12:37:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 12:37:07,503 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 14.837837837837839) internal successors, (549), 37 states have internal predecessors, (549), 0 states have call successors, (0), 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 119 [2023-12-02 12:37:07,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:37:07,558 INFO L225 Difference]: With dead ends: 93023 [2023-12-02 12:37:07,558 INFO L226 Difference]: Without dead ends: 65865 [2023-12-02 12:37:07,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 673 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=754, Invalid=3406, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 12:37:07,577 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 1899 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:37:07,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1899 Valid, 1498 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 12:37:07,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65865 states. [2023-12-02 12:37:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65865 to 55193. [2023-12-02 12:37:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55193 states, 55192 states have (on average 1.1933432381504565) internal successors, (65863), 55192 states have internal predecessors, (65863), 0 states have call successors, (0), 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 12:37:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55193 states to 55193 states and 65863 transitions. [2023-12-02 12:37:11,140 INFO L78 Accepts]: Start accepts. Automaton has 55193 states and 65863 transitions. Word has length 119 [2023-12-02 12:37:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:37:11,140 INFO L495 AbstractCegarLoop]: Abstraction has 55193 states and 65863 transitions. [2023-12-02 12:37:11,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 14.837837837837839) internal successors, (549), 37 states have internal predecessors, (549), 0 states have call successors, (0), 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 12:37:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 55193 states and 65863 transitions. [2023-12-02 12:37:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-02 12:37:11,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:37:11,142 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:37:11,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-12-02 12:37:11,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2023-12-02 12:37:11,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2023-12-02 12:37:11,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:37:11,743 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:37:11,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:37:11,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1471187424, now seen corresponding path program 1 times [2023-12-02 12:37:11,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 12:37:11,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545235747] [2023-12-02 12:37:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:11,744 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 12:37:11,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 12:37:11,745 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 12:37:11,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2023-12-02 12:37:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:11,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:37:11,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:37:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:37:12,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:37:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:37:13,169 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 12:37:13,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545235747] [2023-12-02 12:37:13,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545235747] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:37:13,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1189918858] [2023-12-02 12:37:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:37:13,169 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 12:37:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 12:37:13,170 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 12:37:13,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcb6e01-2597-40c6-98ff-f976adda640d/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2023-12-02 12:37:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:37:13,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-02 12:37:13,337 INFO L285 TraceCheckSpWp]: Computing forward predicates...