./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/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_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/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_758886ea-fc39-4a04-9a68-84f886ba4cd8/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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:36:07,560 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:36:07,629 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:36:07,635 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:36:07,635 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:36:07,659 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:36:07,660 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:36:07,661 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:36:07,661 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:36:07,662 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:36:07,663 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:36:07,663 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:36:07,664 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:36:07,664 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:36:07,665 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:36:07,665 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:36:07,666 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:36:07,666 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:36:07,667 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:36:07,667 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:36:07,668 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:36:07,669 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:36:07,670 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:36:07,670 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:36:07,671 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:36:07,671 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:36:07,672 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:36:07,672 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:36:07,673 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:36:07,673 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:36:07,673 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:36:07,674 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:36:07,674 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:36:07,674 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:36:07,675 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:36:07,675 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:36:07,675 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:36:07,675 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:36:07,676 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:36:07,676 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:36:07,676 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:36:07,676 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:36:07,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:36:07,676 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:36:07,677 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:36:07,677 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:36:07,677 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:36:07,677 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_758886ea-fc39-4a04-9a68-84f886ba4cd8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2023-12-02 16:36:07,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:36:07,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:36:07,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:36:07,921 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:36:07,921 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:36:07,923 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-12-02 16:36:10,726 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:36:10,910 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:36:10,911 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-12-02 16:36:10,922 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/data/479a2a08f/a7b6d5abcaca463fa592c2e6f8dc5a4c/FLAG9b721a16b [2023-12-02 16:36:10,935 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/data/479a2a08f/a7b6d5abcaca463fa592c2e6f8dc5a4c [2023-12-02 16:36:10,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:36:10,939 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:36:10,940 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:36:10,940 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:36:10,945 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:36:10,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:36:10" (1/1) ... [2023-12-02 16:36:10,947 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dffdfef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:10, skipping insertion in model container [2023-12-02 16:36:10,948 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:36:10" (1/1) ... [2023-12-02 16:36:10,984 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:36:11,134 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_758886ea-fc39-4a04-9a68-84f886ba4cd8/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-12-02 16:36:11,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:36:11,198 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:36:11,211 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_758886ea-fc39-4a04-9a68-84f886ba4cd8/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-12-02 16:36:11,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:36:11,260 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:36:11,260 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11 WrapperNode [2023-12-02 16:36:11,261 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:36:11,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:36:11,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:36:11,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:36:11,269 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (1/1) ... [2023-12-02 16:36:11,278 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (1/1) ... [2023-12-02 16:36:11,306 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 186 [2023-12-02 16:36:11,306 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:36:11,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:36:11,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:36:11,307 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:36:11,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (1/1) ... [2023-12-02 16:36:11,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (1/1) ... [2023-12-02 16:36:11,320 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (1/1) ... [2023-12-02 16:36:11,320 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (1/1) ... [2023-12-02 16:36:11,327 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (1/1) ... [2023-12-02 16:36:11,332 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (1/1) ... [2023-12-02 16:36:11,334 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (1/1) ... [2023-12-02 16:36:11,336 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (1/1) ... [2023-12-02 16:36:11,339 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:36:11,340 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:36:11,341 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:36:11,341 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:36:11,342 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (1/1) ... [2023-12-02 16:36:11,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:36:11,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:36:11,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:36:11,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:36:11,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:36:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:36:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-02 16:36:11,421 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-02 16:36:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:36:11,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:36:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 16:36:11,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 16:36:11,510 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:36:11,512 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:36:11,875 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:36:12,074 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:36:12,074 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 16:36:12,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:36:12 BoogieIcfgContainer [2023-12-02 16:36:12,076 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:36:12,078 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:36:12,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:36:12,082 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:36:12,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:36:10" (1/3) ... [2023-12-02 16:36:12,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcf9bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:36:12, skipping insertion in model container [2023-12-02 16:36:12,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:11" (2/3) ... [2023-12-02 16:36:12,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcf9bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:36:12, skipping insertion in model container [2023-12-02 16:36:12,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:36:12" (3/3) ... [2023-12-02 16:36:12,084 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2023-12-02 16:36:12,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:36:12,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:36:12,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:36:12,157 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;@1698e0f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:36:12,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:36:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 37 states have internal predecessors, (52), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 16:36:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 16:36:12,170 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:12,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:12,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:12,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:12,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1650559369, now seen corresponding path program 1 times [2023-12-02 16:36:12,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:36:12,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25253708] [2023-12-02 16:36:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:12,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:36:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:12,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:36:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25253708] [2023-12-02 16:36:12,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25253708] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:12,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:12,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:36:12,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333512062] [2023-12-02 16:36:12,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:12,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:36:12,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:36:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:36:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:36:12,956 INFO L87 Difference]: Start difference. First operand has 47 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 37 states have internal predecessors, (52), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:36:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:13,202 INFO L93 Difference]: Finished difference Result 121 states and 201 transitions. [2023-12-02 16:36:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:36:13,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-12-02 16:36:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:13,215 INFO L225 Difference]: With dead ends: 121 [2023-12-02 16:36:13,215 INFO L226 Difference]: Without dead ends: 73 [2023-12-02 16:36:13,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:36:13,222 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 28 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:13,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 379 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:36:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-02 16:36:13,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2023-12-02 16:36:13,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 39 states have internal predecessors, (51), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2023-12-02 16:36:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 74 transitions. [2023-12-02 16:36:13,270 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 74 transitions. Word has length 24 [2023-12-02 16:36:13,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:13,271 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 74 transitions. [2023-12-02 16:36:13,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:36:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 74 transitions. [2023-12-02 16:36:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 16:36:13,274 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:13,274 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:13,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:36:13,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:13,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1378243315, now seen corresponding path program 1 times [2023-12-02 16:36:13,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:36:13,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150183565] [2023-12-02 16:36:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:13,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:36:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:13,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:36:13,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150183565] [2023-12-02 16:36:13,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150183565] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:36:13,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741704895] [2023-12-02 16:36:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:13,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:13,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:36:13,556 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:36:13,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:36:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:13,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 16:36:13,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:36:13,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:36:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:14,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741704895] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:36:14,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833880057] [2023-12-02 16:36:14,143 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 16:36:14,144 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:36:14,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:36:14,152 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:36:14,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:36:14,681 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-12-02 16:36:14,691 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:36:16,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1833880057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:16,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:36:16,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [9, 11, 9] total 36 [2023-12-02 16:36:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130275800] [2023-12-02 16:36:16,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:16,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 16:36:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:36:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 16:36:16,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 16:36:16,064 INFO L87 Difference]: Start difference. First operand 51 states and 74 transitions. Second operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 16:36:16,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:16,881 INFO L93 Difference]: Finished difference Result 138 states and 222 transitions. [2023-12-02 16:36:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 16:36:16,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-12-02 16:36:16,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:16,885 INFO L225 Difference]: With dead ends: 138 [2023-12-02 16:36:16,885 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 16:36:16,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 16:36:16,888 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 134 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:16,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 213 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:36:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 16:36:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 62. [2023-12-02 16:36:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 47 states have internal predecessors, (59), 12 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (23), 13 states have call predecessors, (23), 11 states have call successors, (23) [2023-12-02 16:36:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 94 transitions. [2023-12-02 16:36:16,915 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 94 transitions. Word has length 27 [2023-12-02 16:36:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:16,916 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 94 transitions. [2023-12-02 16:36:16,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 16:36:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 94 transitions. [2023-12-02 16:36:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 16:36:16,919 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:16,919 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:16,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:36:17,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:17,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:17,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1616466578, now seen corresponding path program 1 times [2023-12-02 16:36:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:36:17,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766250018] [2023-12-02 16:36:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:17,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:36:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:17,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:36:17,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766250018] [2023-12-02 16:36:17,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766250018] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:17,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:17,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-12-02 16:36:17,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333924526] [2023-12-02 16:36:17,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:17,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 16:36:17,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:36:17,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 16:36:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:36:17,517 INFO L87 Difference]: Start difference. First operand 62 states and 94 transitions. Second operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:36:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:17,832 INFO L93 Difference]: Finished difference Result 99 states and 147 transitions. [2023-12-02 16:36:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 16:36:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-12-02 16:36:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:17,834 INFO L225 Difference]: With dead ends: 99 [2023-12-02 16:36:17,834 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 16:36:17,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:36:17,836 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 48 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:17,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 659 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:36:17,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 16:36:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2023-12-02 16:36:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 48 states have internal predecessors, (58), 14 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (23), 13 states have call predecessors, (23), 12 states have call successors, (23) [2023-12-02 16:36:17,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 95 transitions. [2023-12-02 16:36:17,854 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 95 transitions. Word has length 28 [2023-12-02 16:36:17,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:17,855 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 95 transitions. [2023-12-02 16:36:17,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:36:17,855 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 95 transitions. [2023-12-02 16:36:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 16:36:17,858 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:17,858 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:17,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:36:17,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:17,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:17,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1055597346, now seen corresponding path program 1 times [2023-12-02 16:36:17,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:36:17,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086977540] [2023-12-02 16:36:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:17,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:36:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:18,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:36:18,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086977540] [2023-12-02 16:36:18,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086977540] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:36:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215533774] [2023-12-02 16:36:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:18,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:18,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:36:18,458 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:36:18,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:36:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:18,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 16:36:18,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:36:18,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:36:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:19,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215533774] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:36:19,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1914723318] [2023-12-02 16:36:19,035 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-12-02 16:36:19,035 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:36:19,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:36:19,036 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:36:19,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:36:19,422 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-12-02 16:36:19,493 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-12-02 16:36:19,980 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-12-02 16:36:20,243 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-12-02 16:36:20,247 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 47 for LOIs [2023-12-02 16:36:20,421 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:36:22,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1137#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 16:36:22,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:36:22,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:36:22,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 19 [2023-12-02 16:36:22,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736921689] [2023-12-02 16:36:22,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:36:22,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 16:36:22,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:36:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 16:36:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2023-12-02 16:36:22,008 INFO L87 Difference]: Start difference. First operand 63 states and 95 transitions. Second operand has 19 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 16:36:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:22,483 INFO L93 Difference]: Finished difference Result 114 states and 176 transitions. [2023-12-02 16:36:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 16:36:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2023-12-02 16:36:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:22,486 INFO L225 Difference]: With dead ends: 114 [2023-12-02 16:36:22,486 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 16:36:22,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 16:36:22,488 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 55 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:22,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 552 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:36:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 16:36:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2023-12-02 16:36:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 49 states have internal predecessors, (60), 14 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (23), 14 states have call predecessors, (23), 12 states have call successors, (23) [2023-12-02 16:36:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 97 transitions. [2023-12-02 16:36:22,508 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 97 transitions. Word has length 28 [2023-12-02 16:36:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:22,509 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 97 transitions. [2023-12-02 16:36:22,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 16:36:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 97 transitions. [2023-12-02 16:36:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 16:36:22,511 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:22,511 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:22,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:36:22,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:22,713 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:22,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:22,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1923985285, now seen corresponding path program 1 times [2023-12-02 16:36:22,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:36:22,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311140251] [2023-12-02 16:36:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:22,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:36:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:23,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:36:23,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311140251] [2023-12-02 16:36:23,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311140251] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:36:23,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284970042] [2023-12-02 16:36:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:23,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:23,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:36:23,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:36:23,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:36:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:23,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 16:36:23,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:36:23,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:36:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:23,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284970042] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:36:23,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [56436365] [2023-12-02 16:36:23,418 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 16:36:23,419 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:36:23,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:36:23,420 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:36:23,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:36:23,795 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-12-02 16:36:23,825 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:36:24,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [56436365] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:24,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:36:24,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [9, 11, 9] total 38 [2023-12-02 16:36:24,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578717190] [2023-12-02 16:36:24,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:24,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 16:36:24,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:36:24,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 16:36:24,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 16:36:24,809 INFO L87 Difference]: Start difference. First operand 65 states and 97 transitions. Second operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 16:36:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:26,364 INFO L93 Difference]: Finished difference Result 195 states and 298 transitions. [2023-12-02 16:36:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 16:36:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-12-02 16:36:26,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:26,367 INFO L225 Difference]: With dead ends: 195 [2023-12-02 16:36:26,368 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 16:36:26,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 16:36:26,370 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 106 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:26,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 334 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:36:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 16:36:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 74. [2023-12-02 16:36:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.320754716981132) internal successors, (70), 58 states have internal predecessors, (70), 14 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (32), 14 states have call predecessors, (32), 12 states have call successors, (32) [2023-12-02 16:36:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 116 transitions. [2023-12-02 16:36:26,385 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 116 transitions. Word has length 30 [2023-12-02 16:36:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:26,385 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 116 transitions. [2023-12-02 16:36:26,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 16:36:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 116 transitions. [2023-12-02 16:36:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 16:36:26,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:26,387 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:26,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:36:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:26,588 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:26,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash 561839916, now seen corresponding path program 1 times [2023-12-02 16:36:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:36:26,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982253824] [2023-12-02 16:36:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:26,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:36:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:26,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:36:26,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982253824] [2023-12-02 16:36:26,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982253824] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:36:26,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065909231] [2023-12-02 16:36:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:26,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:26,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:36:26,826 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:36:26,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:36:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:26,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 16:36:26,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:36:26,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:36:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:27,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065909231] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:36:27,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439090948] [2023-12-02 16:36:27,182 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 16:36:27,182 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:36:27,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:36:27,182 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:36:27,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:36:27,497 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 47 for LOIs [2023-12-02 16:36:27,612 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:36:29,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1439090948] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:29,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:36:29,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9, 11, 9] total 35 [2023-12-02 16:36:29,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704675641] [2023-12-02 16:36:29,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:29,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 16:36:29,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:36:29,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 16:36:29,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 16:36:29,596 INFO L87 Difference]: Start difference. First operand 74 states and 116 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:30,693 INFO L93 Difference]: Finished difference Result 99 states and 147 transitions. [2023-12-02 16:36:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 16:36:30,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2023-12-02 16:36:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:30,696 INFO L225 Difference]: With dead ends: 99 [2023-12-02 16:36:30,696 INFO L226 Difference]: Without dead ends: 78 [2023-12-02 16:36:30,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 16:36:30,699 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 77 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:30,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 121 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:36:30,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-02 16:36:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2023-12-02 16:36:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.375) internal successors, (66), 52 states have internal predecessors, (66), 10 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-02 16:36:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 93 transitions. [2023-12-02 16:36:30,719 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 93 transitions. Word has length 31 [2023-12-02 16:36:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:30,720 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 93 transitions. [2023-12-02 16:36:30,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:30,720 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 93 transitions. [2023-12-02 16:36:30,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 16:36:30,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:30,721 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:30,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 16:36:30,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:30,922 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:30,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:30,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1155168171, now seen corresponding path program 1 times [2023-12-02 16:36:30,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:36:30,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042328155] [2023-12-02 16:36:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:30,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:36:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:32,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:36:32,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042328155] [2023-12-02 16:36:32,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042328155] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:36:32,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603193307] [2023-12-02 16:36:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:32,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:32,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:36:32,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:36:32,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:36:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:32,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 16:36:32,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:36:32,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:36:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:36:32,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603193307] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:36:32,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:36:32,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16, 14] total 29 [2023-12-02 16:36:32,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639986335] [2023-12-02 16:36:32,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:32,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:36:32,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:36:32,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:36:32,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:36:32,974 INFO L87 Difference]: Start difference. First operand 64 states and 93 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:33,195 INFO L93 Difference]: Finished difference Result 80 states and 113 transitions. [2023-12-02 16:36:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:36:33,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-12-02 16:36:33,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:33,197 INFO L225 Difference]: With dead ends: 80 [2023-12-02 16:36:33,197 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 16:36:33,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2023-12-02 16:36:33,198 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 24 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:33,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 307 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:36:33,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 16:36:33,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 16:36:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 49 states have internal predecessors, (59), 11 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-12-02 16:36:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 82 transitions. [2023-12-02 16:36:33,217 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 82 transitions. Word has length 32 [2023-12-02 16:36:33,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:33,217 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 82 transitions. [2023-12-02 16:36:33,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 82 transitions. [2023-12-02 16:36:33,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 16:36:33,218 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:33,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:33,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:36:33,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:33,419 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:33,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1076587771, now seen corresponding path program 2 times [2023-12-02 16:36:33,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:36:33,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954666289] [2023-12-02 16:36:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:33,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:36:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:36:35,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:36:35,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954666289] [2023-12-02 16:36:35,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954666289] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:36:35,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231633079] [2023-12-02 16:36:35,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:36:35,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:35,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:36:35,470 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:36:35,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:36:36,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 16:36:36,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:36:36,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 16:36:36,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:36:36,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231633079] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:36,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:36:36,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 18 [2023-12-02 16:36:36,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119615319] [2023-12-02 16:36:36,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:36,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:36:36,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:36:36,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:36:36,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-12-02 16:36:36,687 INFO L87 Difference]: Start difference. First operand 60 states and 82 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:36,854 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2023-12-02 16:36:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:36:36,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-12-02 16:36:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:36,856 INFO L225 Difference]: With dead ends: 66 [2023-12-02 16:36:36,856 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 16:36:36,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:36:36,857 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:36,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 206 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:36:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 16:36:36,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-12-02 16:36:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 52 states have internal predecessors, (62), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-12-02 16:36:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2023-12-02 16:36:36,882 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 32 [2023-12-02 16:36:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:36,882 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2023-12-02 16:36:36,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2023-12-02 16:36:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 16:36:36,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:36,883 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:36,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:36:37,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:37,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:37,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:37,084 INFO L85 PathProgramCache]: Analyzing trace with hash 258707118, now seen corresponding path program 1 times [2023-12-02 16:36:37,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:36:37,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474774659] [2023-12-02 16:36:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:37,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:36:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:36:37,265 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:36:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:36:37,473 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 16:36:37,473 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:36:37,474 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 16:36:37,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 16:36:37,479 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:37,483 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 16:36:37,511 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret20 could not be translated [2023-12-02 16:36:37,512 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-12-02 16:36:37,514 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated [2023-12-02 16:36:37,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:36:37 BoogieIcfgContainer [2023-12-02 16:36:37,529 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 16:36:37,529 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 16:36:37,529 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 16:36:37,529 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 16:36:37,530 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:36:12" (3/4) ... [2023-12-02 16:36:37,532 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 16:36:37,533 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 16:36:37,533 INFO L158 Benchmark]: Toolchain (without parser) took 26594.69ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 100.5MB in the beginning and 139.3MB in the end (delta: -38.8MB). Peak memory consumption was 112.6MB. Max. memory is 16.1GB. [2023-12-02 16:36:37,534 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 136.3MB. Free memory is still 109.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:36:37,534 INFO L158 Benchmark]: CACSL2BoogieTranslator took 321.05ms. Allocated memory is still 136.3MB. Free memory was 100.5MB in the beginning and 86.3MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 16:36:37,534 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.41ms. Allocated memory is still 136.3MB. Free memory was 86.3MB in the beginning and 84.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:36:37,535 INFO L158 Benchmark]: Boogie Preprocessor took 32.88ms. Allocated memory is still 136.3MB. Free memory was 84.2MB in the beginning and 82.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:36:37,535 INFO L158 Benchmark]: RCFGBuilder took 735.44ms. Allocated memory is still 136.3MB. Free memory was 82.6MB in the beginning and 87.6MB in the end (delta: -5.0MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. [2023-12-02 16:36:37,535 INFO L158 Benchmark]: TraceAbstraction took 25450.40ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 86.9MB in the beginning and 139.3MB in the end (delta: -52.4MB). Peak memory consumption was 96.1MB. Max. memory is 16.1GB. [2023-12-02 16:36:37,536 INFO L158 Benchmark]: Witness Printer took 3.69ms. Allocated memory is still 285.2MB. Free memory is still 139.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:36:37,537 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 136.3MB. Free memory is still 109.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 321.05ms. Allocated memory is still 136.3MB. Free memory was 100.5MB in the beginning and 86.3MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.41ms. Allocated memory is still 136.3MB. Free memory was 86.3MB in the beginning and 84.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.88ms. Allocated memory is still 136.3MB. Free memory was 84.2MB in the beginning and 82.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 735.44ms. Allocated memory is still 136.3MB. Free memory was 82.6MB in the beginning and 87.6MB in the end (delta: -5.0MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. * TraceAbstraction took 25450.40ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 86.9MB in the beginning and 139.3MB in the end (delta: -52.4MB). Peak memory consumption was 96.1MB. Max. memory is 16.1GB. * Witness Printer took 3.69ms. Allocated memory is still 285.2MB. Free memory is still 139.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret20 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 110, overapproximation of bitwiseAnd at line 76. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; VAL [ea=-126, eb=127] [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L251] RET, EXPR base2flt(0, 0) VAL [ea=-126, eb=127] [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-126, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L76] EXPR m & ~ (1U << 24U) [L76] m = m & ~ (1U << 24U) [L77] EXPR m | ((unsigned int )(e + 128) << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=-126, \old(m)=16777216, __retres4=50331648, e=-126, m=16777216, res=50331648] [L80] return (__retres4); [L252] RET, EXPR base2flt(ma, ea) VAL [ea=-126, eb=127, ma=16777216, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m)=16777216, e=127, m=16777216] [L76] EXPR m & ~ (1U << 24U) [L76] m = m & ~ (1U << 24U) [L77] EXPR m | ((unsigned int )(e + 128) << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=127, \old(m)=16777216, __retres4=4278190080, e=127, m=16777216, res=4278190080] [L80] return (__retres4); [L253] RET, EXPR base2flt(mb, eb) VAL [a=50331648, ea=-126, eb=127, ma=16777216, mb=16777216, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) [L258] COND TRUE a > zero [L259] tmp = 1 [L263] sa = tmp [L265] COND FALSE !(b < zero) [L268] COND TRUE b > zero [L269] tmp___0 = 1 [L273] sb = tmp___0 [L276] CALL addflt(a, b) [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; [L94] COND TRUE a < b [L95] tmp = a [L96] a = b [L97] b = tmp VAL [\old(a)=50331648, \old(b)=4278190080, a=4278190080, b=50331648, tmp=50331648] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] EXPR ma | (1U << 24U) [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] EXPR mb | (1U << 24U) [L113] mb = mb | (1U << 24U) [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L114] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=50331648, \old(b)=4278190080, a=4278190080, b=50331648, ea=127, eb=-125, ma=16777216, mb=16777216, tmp=50331648] [L115] delta = ea - eb VAL [\old(a)=50331648, \old(b)=4278190080, a=4278190080, b=50331648, delta=252, ea=127, eb=-125, ma=16777216, mb=16777216, tmp=50331648] [L116] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.3s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 573 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 495 mSDsluCounter, 2771 SdHoareTripleChecker+Invalid, 2.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2388 mSDsCounter, 57 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2596 IncrementalHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 57 mSolverCounterUnsat, 383 mSDtfsCounter, 2596 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 570 GetRequests, 344 SyntacticMatches, 3 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=5, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 201 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 450 NumberOfCodeBlocks, 434 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 541 ConstructedInterpolants, 0 QuantifiedInterpolants, 1867 SizeOfPredicates, 66 NumberOfNonLiveVariables, 644 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 161/236 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 63, DAG_INTERPRETER_EARLY_EXITS: 3, TOOLS_POST_APPLICATIONS: 58, TOOLS_POST_TIME: 0.5s, TOOLS_POST_CALL_APPLICATIONS: 27, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 18, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 103, TOOLS_QUANTIFIERELIM_TIME: 1.0s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 147, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 30, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 63, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 18, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 627, DAG_COMPRESSION_RETAINED_NODES: 154, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-02 16:36:37,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/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_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/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_758886ea-fc39-4a04-9a68-84f886ba4cd8/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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:36:39,736 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:36:39,820 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 16:36:39,827 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:36:39,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:36:39,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:36:39,860 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:36:39,861 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:36:39,862 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:36:39,862 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:36:39,863 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:36:39,864 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:36:39,864 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:36:39,865 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:36:39,866 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:36:39,866 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:36:39,867 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:36:39,868 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:36:39,869 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:36:39,869 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:36:39,870 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:36:39,871 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:36:39,871 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:36:39,872 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:36:39,873 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 16:36:39,873 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 16:36:39,874 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 16:36:39,874 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:36:39,875 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:36:39,875 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:36:39,876 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:36:39,876 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 16:36:39,877 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:36:39,877 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:36:39,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:36:39,878 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:36:39,878 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:36:39,878 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:36:39,878 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 16:36:39,879 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 16:36:39,879 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:36:39,880 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:36:39,880 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:36:39,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:36:39,880 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_758886ea-fc39-4a04-9a68-84f886ba4cd8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2023-12-02 16:36:40,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:36:40,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:36:40,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:36:40,258 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:36:40,259 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:36:40,260 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-12-02 16:36:43,128 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:36:43,353 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:36:43,354 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2023-12-02 16:36:43,364 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/data/a6ab6aba1/d85c5d48c8bf4e98b2efdb2f2b7e5c89/FLAG3e2c37e2e [2023-12-02 16:36:43,378 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/data/a6ab6aba1/d85c5d48c8bf4e98b2efdb2f2b7e5c89 [2023-12-02 16:36:43,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:36:43,382 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:36:43,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:36:43,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:36:43,389 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:36:43,389 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,391 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@397e28ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43, skipping insertion in model container [2023-12-02 16:36:43,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,424 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:36:43,564 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_758886ea-fc39-4a04-9a68-84f886ba4cd8/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-12-02 16:36:43,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:36:43,630 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:36:43,642 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_758886ea-fc39-4a04-9a68-84f886ba4cd8/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2023-12-02 16:36:43,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:36:43,687 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:36:43,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43 WrapperNode [2023-12-02 16:36:43,687 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:36:43,688 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:36:43,689 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:36:43,689 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:36:43,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,705 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,728 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2023-12-02 16:36:43,729 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:36:43,730 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:36:43,730 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:36:43,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:36:43,739 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,753 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,759 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,761 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,763 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,766 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:36:43,767 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:36:43,768 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:36:43,768 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:36:43,769 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (1/1) ... [2023-12-02 16:36:43,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:36:43,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:36:43,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:36:43,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:36:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:36:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 16:36:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-12-02 16:36:43,834 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-12-02 16:36:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:36:43,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:36:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 16:36:43,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 16:36:43,908 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:36:43,910 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:36:44,232 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:36:44,262 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:36:44,262 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 16:36:44,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:36:44 BoogieIcfgContainer [2023-12-02 16:36:44,263 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:36:44,266 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:36:44,266 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:36:44,269 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:36:44,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:36:43" (1/3) ... [2023-12-02 16:36:44,271 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a493931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:36:44, skipping insertion in model container [2023-12-02 16:36:44,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:36:43" (2/3) ... [2023-12-02 16:36:44,271 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a493931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:36:44, skipping insertion in model container [2023-12-02 16:36:44,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:36:44" (3/3) ... [2023-12-02 16:36:44,273 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2023-12-02 16:36:44,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:36:44,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:36:44,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:36:44,350 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;@129b80b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:36:44,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:36:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 57 states have internal predecessors, (89), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 16:36:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 16:36:44,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:44,367 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:44,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:44,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:44,373 INFO L85 PathProgramCache]: Analyzing trace with hash -821609906, now seen corresponding path program 1 times [2023-12-02 16:36:44,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:44,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502857685] [2023-12-02 16:36:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:44,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:44,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:44,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:44,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 16:36:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:44,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:36:44,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:44,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:36:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:44,669 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:44,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502857685] [2023-12-02 16:36:44,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502857685] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:36:44,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [552609392] [2023-12-02 16:36:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:44,671 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:36:44,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:36:44,696 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:36:44,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2023-12-02 16:36:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:44,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:36:44,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:44,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:36:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:44,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [552609392] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:36:44,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956726680] [2023-12-02 16:36:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:44,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:44,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:36:44,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:36:44,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:36:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:45,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:36:45,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:45,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:36:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:45,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956726680] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:36:45,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:36:45,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 10 [2023-12-02 16:36:45,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714658730] [2023-12-02 16:36:45,138 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:36:45,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:36:45,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:45,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:36:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:36:45,167 INFO L87 Difference]: Start difference. First operand has 67 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 57 states have internal predecessors, (89), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 16:36:45,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:45,694 INFO L93 Difference]: Finished difference Result 254 states and 444 transitions. [2023-12-02 16:36:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 16:36:45,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2023-12-02 16:36:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:45,706 INFO L225 Difference]: With dead ends: 254 [2023-12-02 16:36:45,707 INFO L226 Difference]: Without dead ends: 184 [2023-12-02 16:36:45,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:36:45,714 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 145 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:45,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1085 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:36:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-12-02 16:36:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 107. [2023-12-02 16:36:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 88 states have (on average 1.4545454545454546) internal successors, (128), 89 states have internal predecessors, (128), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (21), 17 states have call predecessors, (21), 14 states have call successors, (21) [2023-12-02 16:36:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 164 transitions. [2023-12-02 16:36:45,764 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 164 transitions. Word has length 28 [2023-12-02 16:36:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:45,765 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 164 transitions. [2023-12-02 16:36:45,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 16:36:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 164 transitions. [2023-12-02 16:36:45,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 16:36:45,769 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:45,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:45,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2023-12-02 16:36:45,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:36:46,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 16:36:46,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:46,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:46,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1167308637, now seen corresponding path program 1 times [2023-12-02 16:36:46,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:46,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051902791] [2023-12-02 16:36:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:46,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:46,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:46,375 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:46,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:46,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:36:46,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:46,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:46,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:46,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051902791] [2023-12-02 16:36:46,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051902791] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:46,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:46,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:36:46,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442405564] [2023-12-02 16:36:46,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:46,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:36:46,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:46,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:36:46,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:36:46,474 INFO L87 Difference]: Start difference. First operand 107 states and 164 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:46,584 INFO L93 Difference]: Finished difference Result 239 states and 367 transitions. [2023-12-02 16:36:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:36:46,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-12-02 16:36:46,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:46,587 INFO L225 Difference]: With dead ends: 239 [2023-12-02 16:36:46,588 INFO L226 Difference]: Without dead ends: 180 [2023-12-02 16:36:46,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:36:46,590 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 50 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:46,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 417 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:36:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-02 16:36:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2023-12-02 16:36:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 150 states have (on average 1.44) internal successors, (216), 149 states have internal predecessors, (216), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2023-12-02 16:36:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 266 transitions. [2023-12-02 16:36:46,612 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 266 transitions. Word has length 36 [2023-12-02 16:36:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:46,613 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 266 transitions. [2023-12-02 16:36:46,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 266 transitions. [2023-12-02 16:36:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 16:36:46,616 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:46,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:46,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:46,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:46,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:46,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:46,820 INFO L85 PathProgramCache]: Analyzing trace with hash -487250267, now seen corresponding path program 1 times [2023-12-02 16:36:46,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:46,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690248894] [2023-12-02 16:36:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:46,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:46,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:46,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:46,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:46,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:36:46,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:46,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:46,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:46,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690248894] [2023-12-02 16:36:46,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690248894] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:46,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:46,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:36:46,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203487454] [2023-12-02 16:36:46,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:46,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:36:46,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:46,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:36:46,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:36:46,929 INFO L87 Difference]: Start difference. First operand 176 states and 266 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:47,068 INFO L93 Difference]: Finished difference Result 225 states and 337 transitions. [2023-12-02 16:36:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:36:47,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-12-02 16:36:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:47,071 INFO L225 Difference]: With dead ends: 225 [2023-12-02 16:36:47,071 INFO L226 Difference]: Without dead ends: 172 [2023-12-02 16:36:47,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:36:47,073 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 39 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:47,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 490 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:36:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-02 16:36:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2023-12-02 16:36:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 144 states have (on average 1.4166666666666667) internal successors, (204), 143 states have internal predecessors, (204), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2023-12-02 16:36:47,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 248 transitions. [2023-12-02 16:36:47,090 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 248 transitions. Word has length 36 [2023-12-02 16:36:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:47,091 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 248 transitions. [2023-12-02 16:36:47,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:47,091 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 248 transitions. [2023-12-02 16:36:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 16:36:47,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:47,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:47,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 16:36:47,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:47,297 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:47,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:47,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1498292337, now seen corresponding path program 1 times [2023-12-02 16:36:47,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:47,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645448274] [2023-12-02 16:36:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:47,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:47,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:47,299 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:47,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:47,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:36:47,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:36:47,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:47,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:47,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645448274] [2023-12-02 16:36:47,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645448274] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:47,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:47,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:36:47,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761995810] [2023-12-02 16:36:47,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:47,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:36:47,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:47,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:36:47,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:36:47,374 INFO L87 Difference]: Start difference. First operand 167 states and 248 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:47,421 INFO L93 Difference]: Finished difference Result 310 states and 466 transitions. [2023-12-02 16:36:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:36:47,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2023-12-02 16:36:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:47,424 INFO L225 Difference]: With dead ends: 310 [2023-12-02 16:36:47,425 INFO L226 Difference]: Without dead ends: 244 [2023-12-02 16:36:47,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:36:47,426 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 65 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:47,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 308 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:36:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-12-02 16:36:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 212. [2023-12-02 16:36:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 186 states have (on average 1.3763440860215055) internal successors, (256), 185 states have internal predecessors, (256), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2023-12-02 16:36:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 306 transitions. [2023-12-02 16:36:47,446 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 306 transitions. Word has length 38 [2023-12-02 16:36:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:47,447 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 306 transitions. [2023-12-02 16:36:47,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 306 transitions. [2023-12-02 16:36:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 16:36:47,450 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:47,450 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:47,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-02 16:36:47,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:47,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:47,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:47,658 INFO L85 PathProgramCache]: Analyzing trace with hash 872052806, now seen corresponding path program 1 times [2023-12-02 16:36:47,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:47,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784172643] [2023-12-02 16:36:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:47,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:47,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:47,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:47,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:47,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:36:47,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:36:47,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:47,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:47,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784172643] [2023-12-02 16:36:47,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784172643] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:47,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:47,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:36:47,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616682292] [2023-12-02 16:36:47,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:47,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:36:47,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:47,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:36:47,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:36:47,731 INFO L87 Difference]: Start difference. First operand 212 states and 306 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:36:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:47,800 INFO L93 Difference]: Finished difference Result 347 states and 501 transitions. [2023-12-02 16:36:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:36:47,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-12-02 16:36:47,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:47,803 INFO L225 Difference]: With dead ends: 347 [2023-12-02 16:36:47,803 INFO L226 Difference]: Without dead ends: 137 [2023-12-02 16:36:47,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:36:47,805 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 26 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:47,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 230 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:36:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-02 16:36:47,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 127. [2023-12-02 16:36:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 110 states have (on average 1.3545454545454545) internal successors, (149), 112 states have internal predecessors, (149), 12 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2023-12-02 16:36:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 178 transitions. [2023-12-02 16:36:47,815 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 178 transitions. Word has length 38 [2023-12-02 16:36:47,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:47,816 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 178 transitions. [2023-12-02 16:36:47,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:36:47,816 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 178 transitions. [2023-12-02 16:36:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:36:47,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:47,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:47,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:48,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:48,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:48,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:48,020 INFO L85 PathProgramCache]: Analyzing trace with hash 883826431, now seen corresponding path program 1 times [2023-12-02 16:36:48,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:48,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272553617] [2023-12-02 16:36:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:48,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:48,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:48,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:48,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:48,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 16:36:48,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:36:48,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:36:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:36:48,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:48,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272553617] [2023-12-02 16:36:48,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272553617] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:36:48,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:36:48,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-12-02 16:36:48,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315885944] [2023-12-02 16:36:48,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:48,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:36:48,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:48,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:36:48,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:36:48,284 INFO L87 Difference]: Start difference. First operand 127 states and 178 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:48,479 INFO L93 Difference]: Finished difference Result 201 states and 291 transitions. [2023-12-02 16:36:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:36:48,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-12-02 16:36:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:48,482 INFO L225 Difference]: With dead ends: 201 [2023-12-02 16:36:48,482 INFO L226 Difference]: Without dead ends: 165 [2023-12-02 16:36:48,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:36:48,483 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 37 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:48,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 277 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:36:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-02 16:36:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 153. [2023-12-02 16:36:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 132 states have (on average 1.3484848484848484) internal successors, (178), 135 states have internal predecessors, (178), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (21), 18 states have call predecessors, (21), 15 states have call successors, (21) [2023-12-02 16:36:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 215 transitions. [2023-12-02 16:36:48,494 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 215 transitions. Word has length 39 [2023-12-02 16:36:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:48,494 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 215 transitions. [2023-12-02 16:36:48,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 215 transitions. [2023-12-02 16:36:48,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:36:48,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:48,495 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:48,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:48,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:48,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:48,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1636133503, now seen corresponding path program 1 times [2023-12-02 16:36:48,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:48,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073663708] [2023-12-02 16:36:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:48,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:48,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:48,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:48,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:48,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:36:48,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:36:48,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:48,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:48,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073663708] [2023-12-02 16:36:48,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073663708] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:48,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:48,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:36:48,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308230535] [2023-12-02 16:36:48,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:48,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:36:48,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:48,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:36:48,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:36:48,759 INFO L87 Difference]: Start difference. First operand 153 states and 215 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:48,800 INFO L93 Difference]: Finished difference Result 160 states and 221 transitions. [2023-12-02 16:36:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:36:48,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-12-02 16:36:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:48,802 INFO L225 Difference]: With dead ends: 160 [2023-12-02 16:36:48,803 INFO L226 Difference]: Without dead ends: 153 [2023-12-02 16:36:48,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:36:48,804 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 5 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:48,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 359 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:36:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-02 16:36:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-12-02 16:36:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 132 states have (on average 1.3257575757575757) internal successors, (175), 135 states have internal predecessors, (175), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (21), 18 states have call predecessors, (21), 15 states have call successors, (21) [2023-12-02 16:36:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 212 transitions. [2023-12-02 16:36:48,814 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 212 transitions. Word has length 39 [2023-12-02 16:36:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:48,815 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 212 transitions. [2023-12-02 16:36:48,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 212 transitions. [2023-12-02 16:36:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 16:36:48,817 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:48,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:48,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:49,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:49,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:49,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:49,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1292111742, now seen corresponding path program 1 times [2023-12-02 16:36:49,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:49,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807804587] [2023-12-02 16:36:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:49,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:49,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:49,022 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:49,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:49,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:36:49,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:36:49,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:49,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:49,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807804587] [2023-12-02 16:36:49,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807804587] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:49,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:49,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:36:49,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951481524] [2023-12-02 16:36:49,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:49,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:36:49,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:49,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:36:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:36:49,082 INFO L87 Difference]: Start difference. First operand 153 states and 212 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:49,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:49,120 INFO L93 Difference]: Finished difference Result 261 states and 368 transitions. [2023-12-02 16:36:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:36:49,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-12-02 16:36:49,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:49,122 INFO L225 Difference]: With dead ends: 261 [2023-12-02 16:36:49,122 INFO L226 Difference]: Without dead ends: 209 [2023-12-02 16:36:49,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:36:49,124 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 74 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:49,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 287 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:36:49,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-12-02 16:36:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 170. [2023-12-02 16:36:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 146 states have (on average 1.3356164383561644) internal successors, (195), 148 states have internal predecessors, (195), 19 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2023-12-02 16:36:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 238 transitions. [2023-12-02 16:36:49,134 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 238 transitions. Word has length 40 [2023-12-02 16:36:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:49,134 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 238 transitions. [2023-12-02 16:36:49,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 238 transitions. [2023-12-02 16:36:49,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 16:36:49,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:49,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:49,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 16:36:49,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:49,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:49,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash -585990824, now seen corresponding path program 2 times [2023-12-02 16:36:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:49,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894658185] [2023-12-02 16:36:49,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 16:36:49,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:49,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:49,337 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:49,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:49,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 16:36:49,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:36:49,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:36:49,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:36:49,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:49,494 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:49,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894658185] [2023-12-02 16:36:49,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894658185] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:49,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:49,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:36:49,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573737454] [2023-12-02 16:36:49,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:49,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:36:49,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:49,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:36:49,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:36:49,496 INFO L87 Difference]: Start difference. First operand 170 states and 238 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:50,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:50,373 INFO L93 Difference]: Finished difference Result 188 states and 261 transitions. [2023-12-02 16:36:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:36:50,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-12-02 16:36:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:50,375 INFO L225 Difference]: With dead ends: 188 [2023-12-02 16:36:50,375 INFO L226 Difference]: Without dead ends: 186 [2023-12-02 16:36:50,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:36:50,376 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 24 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:50,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 420 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:36:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-12-02 16:36:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2023-12-02 16:36:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 149 states have (on average 1.3288590604026846) internal successors, (198), 151 states have internal predecessors, (198), 19 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2023-12-02 16:36:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 241 transitions. [2023-12-02 16:36:50,388 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 241 transitions. Word has length 40 [2023-12-02 16:36:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:50,389 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 241 transitions. [2023-12-02 16:36:50,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 241 transitions. [2023-12-02 16:36:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 16:36:50,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:50,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:50,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:50,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:50,591 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:50,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash -528732522, now seen corresponding path program 1 times [2023-12-02 16:36:50,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:50,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036080594] [2023-12-02 16:36:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:50,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:50,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:50,592 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:50,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:50,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:36:50,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:36:50,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:50,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:50,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036080594] [2023-12-02 16:36:50,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036080594] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:50,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:50,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:36:50,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255303355] [2023-12-02 16:36:50,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:50,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:36:50,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:36:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:36:50,719 INFO L87 Difference]: Start difference. First operand 174 states and 241 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:52,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:36:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:53,894 INFO L93 Difference]: Finished difference Result 188 states and 256 transitions. [2023-12-02 16:36:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:36:53,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-12-02 16:36:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:53,896 INFO L225 Difference]: With dead ends: 188 [2023-12-02 16:36:53,896 INFO L226 Difference]: Without dead ends: 186 [2023-12-02 16:36:53,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:36:53,896 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 24 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:53,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 404 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 16:36:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-12-02 16:36:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 178. [2023-12-02 16:36:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 152 states have (on average 1.3223684210526316) internal successors, (201), 154 states have internal predecessors, (201), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2023-12-02 16:36:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 244 transitions. [2023-12-02 16:36:53,911 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 244 transitions. Word has length 40 [2023-12-02 16:36:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:53,911 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 244 transitions. [2023-12-02 16:36:53,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 244 transitions. [2023-12-02 16:36:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 16:36:53,912 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:53,912 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:53,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-12-02 16:36:54,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:54,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:54,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:54,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1475591700, now seen corresponding path program 1 times [2023-12-02 16:36:54,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:54,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664476628] [2023-12-02 16:36:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:54,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:54,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:54,115 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:54,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:54,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:36:54,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:36:54,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:54,179 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:54,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664476628] [2023-12-02 16:36:54,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664476628] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:54,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:54,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:36:54,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979313087] [2023-12-02 16:36:54,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:54,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:36:54,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:54,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:36:54,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:36:54,181 INFO L87 Difference]: Start difference. First operand 178 states and 244 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:54,229 INFO L93 Difference]: Finished difference Result 193 states and 260 transitions. [2023-12-02 16:36:54,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:36:54,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-12-02 16:36:54,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:54,231 INFO L225 Difference]: With dead ends: 193 [2023-12-02 16:36:54,231 INFO L226 Difference]: Without dead ends: 156 [2023-12-02 16:36:54,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:36:54,232 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 1 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:54,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 269 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:36:54,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-12-02 16:36:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-12-02 16:36:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 130 states have (on average 1.3384615384615384) internal successors, (174), 133 states have internal predecessors, (174), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2023-12-02 16:36:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 215 transitions. [2023-12-02 16:36:54,245 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 215 transitions. Word has length 43 [2023-12-02 16:36:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:54,245 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 215 transitions. [2023-12-02 16:36:54,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 215 transitions. [2023-12-02 16:36:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 16:36:54,246 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:54,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:54,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-12-02 16:36:54,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:54,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:54,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:54,449 INFO L85 PathProgramCache]: Analyzing trace with hash 868602743, now seen corresponding path program 1 times [2023-12-02 16:36:54,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:54,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595747435] [2023-12-02 16:36:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:54,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:54,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:54,451 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:54,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:54,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:36:54,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:36:54,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:54,536 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:54,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595747435] [2023-12-02 16:36:54,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595747435] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:54,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:54,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:36:54,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510713200] [2023-12-02 16:36:54,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:54,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:36:54,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:54,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:36:54,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:36:54,538 INFO L87 Difference]: Start difference. First operand 156 states and 215 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:54,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:54,647 INFO L93 Difference]: Finished difference Result 206 states and 284 transitions. [2023-12-02 16:36:54,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:36:54,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-12-02 16:36:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:54,649 INFO L225 Difference]: With dead ends: 206 [2023-12-02 16:36:54,649 INFO L226 Difference]: Without dead ends: 166 [2023-12-02 16:36:54,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:36:54,650 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 68 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:54,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 320 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:36:54,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-12-02 16:36:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2023-12-02 16:36:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 130 states have (on average 1.323076923076923) internal successors, (172), 133 states have internal predecessors, (172), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2023-12-02 16:36:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 213 transitions. [2023-12-02 16:36:54,666 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 213 transitions. Word has length 44 [2023-12-02 16:36:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:54,666 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 213 transitions. [2023-12-02 16:36:54,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 213 transitions. [2023-12-02 16:36:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 16:36:54,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:54,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:54,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 16:36:54,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:54,868 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:54,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:54,869 INFO L85 PathProgramCache]: Analyzing trace with hash 475575733, now seen corresponding path program 1 times [2023-12-02 16:36:54,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:54,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708181941] [2023-12-02 16:36:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:54,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:54,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:54,870 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:54,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-02 16:36:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:54,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:36:54,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:36:54,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:54,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:54,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708181941] [2023-12-02 16:36:54,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708181941] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:54,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:54,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:36:54,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549386345] [2023-12-02 16:36:54,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:54,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:36:54,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:54,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:36:54,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:36:54,929 INFO L87 Difference]: Start difference. First operand 156 states and 213 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:54,997 INFO L93 Difference]: Finished difference Result 205 states and 276 transitions. [2023-12-02 16:36:54,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:36:54,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2023-12-02 16:36:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:54,999 INFO L225 Difference]: With dead ends: 205 [2023-12-02 16:36:54,999 INFO L226 Difference]: Without dead ends: 179 [2023-12-02 16:36:55,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:36:55,000 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 60 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:55,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 228 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:36:55,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-02 16:36:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 156. [2023-12-02 16:36:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 130 states have (on average 1.3153846153846154) internal successors, (171), 133 states have internal predecessors, (171), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2023-12-02 16:36:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 212 transitions. [2023-12-02 16:36:55,010 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 212 transitions. Word has length 44 [2023-12-02 16:36:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:55,011 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 212 transitions. [2023-12-02 16:36:55,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 212 transitions. [2023-12-02 16:36:55,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 16:36:55,012 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:55,012 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:55,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-12-02 16:36:55,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:55,212 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:55,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:55,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1102878043, now seen corresponding path program 1 times [2023-12-02 16:36:55,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:55,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769842561] [2023-12-02 16:36:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:55,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:55,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:55,214 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:55,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:55,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:36:55,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:36:55,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:55,317 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:55,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769842561] [2023-12-02 16:36:55,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769842561] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:55,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:55,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:36:55,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643064330] [2023-12-02 16:36:55,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:55,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:36:55,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:36:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:36:55,319 INFO L87 Difference]: Start difference. First operand 156 states and 212 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:55,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:55,525 INFO L93 Difference]: Finished difference Result 224 states and 310 transitions. [2023-12-02 16:36:55,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:36:55,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-12-02 16:36:55,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:55,528 INFO L225 Difference]: With dead ends: 224 [2023-12-02 16:36:55,528 INFO L226 Difference]: Without dead ends: 200 [2023-12-02 16:36:55,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:36:55,529 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 41 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:55,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 415 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:36:55,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-12-02 16:36:55,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 187. [2023-12-02 16:36:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 157 states have (on average 1.3121019108280254) internal successors, (206), 161 states have internal predecessors, (206), 23 states have call successors, (23), 4 states have call predecessors, (23), 6 states have return successors, (26), 24 states have call predecessors, (26), 22 states have call successors, (26) [2023-12-02 16:36:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 255 transitions. [2023-12-02 16:36:55,545 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 255 transitions. Word has length 45 [2023-12-02 16:36:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:55,545 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 255 transitions. [2023-12-02 16:36:55,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 255 transitions. [2023-12-02 16:36:55,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 16:36:55,546 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:55,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:55,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-12-02 16:36:55,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:55,747 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:55,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1180790233, now seen corresponding path program 1 times [2023-12-02 16:36:55,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:55,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254028285] [2023-12-02 16:36:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:55,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:55,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:55,749 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:55,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-12-02 16:36:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:55,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:36:55,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:36:55,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:36:55,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:36:55,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254028285] [2023-12-02 16:36:55,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254028285] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:55,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:36:55,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:36:55,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447045462] [2023-12-02 16:36:55,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:55,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:36:55,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:36:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:36:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:36:55,812 INFO L87 Difference]: Start difference. First operand 187 states and 255 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:55,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:55,857 INFO L93 Difference]: Finished difference Result 229 states and 304 transitions. [2023-12-02 16:36:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:36:55,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-12-02 16:36:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:55,859 INFO L225 Difference]: With dead ends: 229 [2023-12-02 16:36:55,859 INFO L226 Difference]: Without dead ends: 195 [2023-12-02 16:36:55,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:36:55,860 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 84 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:55,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 215 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:36:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-12-02 16:36:55,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 187. [2023-12-02 16:36:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 157 states have (on average 1.2356687898089171) internal successors, (194), 161 states have internal predecessors, (194), 23 states have call successors, (23), 4 states have call predecessors, (23), 6 states have return successors, (26), 24 states have call predecessors, (26), 22 states have call successors, (26) [2023-12-02 16:36:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 243 transitions. [2023-12-02 16:36:55,872 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 243 transitions. Word has length 45 [2023-12-02 16:36:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:55,873 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 243 transitions. [2023-12-02 16:36:55,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:36:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 243 transitions. [2023-12-02 16:36:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 16:36:55,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:55,874 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:55,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-12-02 16:36:56,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:56,075 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:36:56,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:56,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1622352930, now seen corresponding path program 1 times [2023-12-02 16:36:56,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:36:56,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998010405] [2023-12-02 16:36:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:56,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:56,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:36:56,077 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:36:56,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:36:56,118 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:36:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:36:56,174 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2023-12-02 16:36:56,174 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:36:56,175 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 16:36:56,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 16:36:56,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:36:56,379 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:56,381 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 16:36:56,395 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated [2023-12-02 16:36:56,396 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-12-02 16:36:56,397 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-12-02 16:36:56,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:36:56 BoogieIcfgContainer [2023-12-02 16:36:56,408 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 16:36:56,408 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 16:36:56,409 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 16:36:56,409 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 16:36:56,409 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:36:44" (3/4) ... [2023-12-02 16:36:56,409 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 16:36:56,414 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated [2023-12-02 16:36:56,415 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated [2023-12-02 16:36:56,416 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated [2023-12-02 16:36:56,457 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 16:36:56,458 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 16:36:56,459 INFO L158 Benchmark]: Toolchain (without parser) took 13076.16ms. Allocated memory was 79.7MB in the beginning and 144.7MB in the end (delta: 65.0MB). Free memory was 55.6MB in the beginning and 56.2MB in the end (delta: -632.4kB). Peak memory consumption was 65.7MB. Max. memory is 16.1GB. [2023-12-02 16:36:56,459 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 79.7MB. Free memory was 56.6MB in the beginning and 56.5MB in the end (delta: 142.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:36:56,459 INFO L158 Benchmark]: CACSL2BoogieTranslator took 304.09ms. Allocated memory is still 79.7MB. Free memory was 55.6MB in the beginning and 41.3MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 16:36:56,460 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.67ms. Allocated memory is still 79.7MB. Free memory was 41.3MB in the beginning and 39.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:36:56,460 INFO L158 Benchmark]: Boogie Preprocessor took 36.96ms. Allocated memory is still 79.7MB. Free memory was 39.3MB in the beginning and 37.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:36:56,461 INFO L158 Benchmark]: RCFGBuilder took 495.49ms. Allocated memory was 79.7MB in the beginning and 119.5MB in the end (delta: 39.8MB). Free memory was 37.5MB in the beginning and 84.9MB in the end (delta: -47.4MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2023-12-02 16:36:56,461 INFO L158 Benchmark]: TraceAbstraction took 12142.18ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 83.9MB in the beginning and 60.4MB in the end (delta: 23.5MB). Peak memory consumption was 50.6MB. Max. memory is 16.1GB. [2023-12-02 16:36:56,462 INFO L158 Benchmark]: Witness Printer took 49.43ms. Allocated memory is still 144.7MB. Free memory was 60.4MB in the beginning and 56.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 16:36:56,464 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 79.7MB. Free memory was 56.6MB in the beginning and 56.5MB in the end (delta: 142.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 304.09ms. Allocated memory is still 79.7MB. Free memory was 55.6MB in the beginning and 41.3MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.67ms. Allocated memory is still 79.7MB. Free memory was 41.3MB in the beginning and 39.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.96ms. Allocated memory is still 79.7MB. Free memory was 39.3MB in the beginning and 37.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 495.49ms. Allocated memory was 79.7MB in the beginning and 119.5MB in the end (delta: 39.8MB). Free memory was 37.5MB in the beginning and 84.9MB in the end (delta: -47.4MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. * TraceAbstraction took 12142.18ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 83.9MB in the beginning and 60.4MB in the end (delta: 23.5MB). Peak memory consumption was 50.6MB. Max. memory is 16.1GB. * Witness Printer took 49.43ms. Allocated memory is still 144.7MB. Free memory was 60.4MB in the beginning and 56.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret8 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L251] RET, EXPR base2flt(0, 0) [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L80] return (__retres4); [L252] RET, EXPR base2flt(ma, ea) VAL [ea=0, ma=16777216, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L80] return (__retres4); [L253] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L258] COND TRUE a > zero [L259] tmp = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, tmp=1, zero=0] [L263] sa = tmp VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L265] COND FALSE !(b < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L268] COND TRUE b > zero [L269] tmp___0 = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, tmp___0=1, zero=0] [L273] sb = tmp___0 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L276] CALL addflt(a, b) [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L94] COND TRUE a < b [L95] tmp = a [L96] a = b [L97] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L114] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L115] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L116] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 67 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.1s, OverallIterations: 16, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 780 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 743 mSDsluCounter, 5724 SdHoareTripleChecker+Invalid, 4.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4302 mSDsCounter, 89 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1184 IncrementalHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 89 mSolverCounterUnsat, 1422 mSDtfsCounter, 1184 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 781 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=4, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 253 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 697 NumberOfCodeBlocks, 681 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 753 ConstructedInterpolants, 2 QuantifiedInterpolants, 1173 SizeOfPredicates, 47 NumberOfNonLiveVariables, 1289 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 21 InterpolantComputations, 14 PerfectInterpolantSequences, 250/268 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 16:36:56,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758886ea-fc39-4a04-9a68-84f886ba4cd8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE