./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/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_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/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_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/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 66e52001defd7e771c0df8c73cdf4ec6b3d90072c8faf9f52fce6d45ff1a83e7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:36:20,182 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:36:20,247 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:36:20,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:36:20,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:36:20,278 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:36:20,278 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:36:20,279 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:36:20,279 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:36:20,280 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:36:20,281 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:36:20,281 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:36:20,282 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:36:20,282 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:36:20,283 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:36:20,283 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:36:20,284 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:36:20,284 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:36:20,285 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:36:20,285 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:36:20,286 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:36:20,287 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:36:20,287 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:36:20,288 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:36:20,288 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:36:20,289 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:36:20,289 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:36:20,289 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:36:20,290 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:36:20,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:36:20,291 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:36:20,291 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:36:20,291 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:36:20,291 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:36:20,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:36:20,292 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:36:20,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:36:20,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:36:20,293 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:36:20,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:36:20,293 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:36:20,293 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:36:20,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:36:20,294 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:36:20,294 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:36:20,294 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:36:20,294 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:36:20,294 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_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66e52001defd7e771c0df8c73cdf4ec6b3d90072c8faf9f52fce6d45ff1a83e7 [2023-12-02 17:36:20,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:36:20,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:36:20,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:36:20,514 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:36:20,515 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:36:20,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2023-12-02 17:36:23,321 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:36:23,496 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:36:23,496 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2023-12-02 17:36:23,505 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/data/c786b47cb/49b9c789dbcd406faa2f7c0521f03355/FLAGa0714b2df [2023-12-02 17:36:23,516 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/data/c786b47cb/49b9c789dbcd406faa2f7c0521f03355 [2023-12-02 17:36:23,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:36:23,520 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:36:23,522 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:36:23,522 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:36:23,527 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:36:23,528 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,529 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b9908a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23, skipping insertion in model container [2023-12-02 17:36:23,529 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,563 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:36:23,730 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_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2023-12-02 17:36:23,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:36:23,745 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:36:23,780 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_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2023-12-02 17:36:23,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:36:23,795 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:36:23,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23 WrapperNode [2023-12-02 17:36:23,796 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:36:23,797 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:36:23,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:36:23,797 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:36:23,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,811 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,835 INFO L138 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 220 [2023-12-02 17:36:23,835 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:36:23,835 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:36:23,836 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:36:23,836 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:36:23,843 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,845 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,845 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,850 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,855 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,863 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:36:23,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:36:23,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:36:23,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:36:23,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (1/1) ... [2023-12-02 17:36:23,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:36:23,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:23,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:36:23,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:36:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:36:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:36:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:36:23,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:36:24,012 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:36:24,014 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:36:24,297 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:36:24,529 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:36:24,529 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 17:36:24,531 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:36:24 BoogieIcfgContainer [2023-12-02 17:36:24,531 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:36:24,533 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:36:24,534 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:36:24,537 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:36:24,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:36:23" (1/3) ... [2023-12-02 17:36:24,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188972bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:36:24, skipping insertion in model container [2023-12-02 17:36:24,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:23" (2/3) ... [2023-12-02 17:36:24,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188972bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:36:24, skipping insertion in model container [2023-12-02 17:36:24,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:36:24" (3/3) ... [2023-12-02 17:36:24,540 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2023-12-02 17:36:24,558 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:36:24,559 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:36:24,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:36:24,612 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;@b6626e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:36:24,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:36:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:24,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 17:36:24,622 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:24,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 17:36:24,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:24,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:24,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1828022212, now seen corresponding path program 1 times [2023-12-02 17:36:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:24,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127360674] [2023-12-02 17:36:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:24,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:36:25,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:25,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127360674] [2023-12-02 17:36:25,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127360674] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:25,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:25,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:36:25,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776261118] [2023-12-02 17:36:25,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:25,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:36:25,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:25,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:36:25,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:36:25,404 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:25,471 INFO L93 Difference]: Finished difference Result 33 states and 48 transitions. [2023-12-02 17:36:25,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:36:25,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 17:36:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:25,480 INFO L225 Difference]: With dead ends: 33 [2023-12-02 17:36:25,480 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 17:36:25,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:36:25,486 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:25,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:36:25,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 17:36:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2023-12-02 17:36:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-12-02 17:36:25,515 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2023-12-02 17:36:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:25,515 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-12-02 17:36:25,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:25,516 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-12-02 17:36:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 17:36:25,516 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:25,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:36:25,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:36:25,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:25,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:25,518 INFO L85 PathProgramCache]: Analyzing trace with hash -670466111, now seen corresponding path program 1 times [2023-12-02 17:36:25,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:25,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161563578] [2023-12-02 17:36:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:25,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:36:25,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:25,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161563578] [2023-12-02 17:36:25,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161563578] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:25,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:25,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:36:25,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361204998] [2023-12-02 17:36:25,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:25,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:36:25,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:25,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:36:25,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:36:25,713 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:25,750 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-12-02 17:36:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:36:25,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 17:36:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:25,751 INFO L225 Difference]: With dead ends: 32 [2023-12-02 17:36:25,751 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 17:36:25,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:36:25,753 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:25,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:36:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 17:36:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2023-12-02 17:36:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-12-02 17:36:25,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2023-12-02 17:36:25,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:25,760 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-12-02 17:36:25,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-12-02 17:36:25,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 17:36:25,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:25,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:36:25,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:36:25,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:25,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash -669840500, now seen corresponding path program 1 times [2023-12-02 17:36:25,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:25,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197151776] [2023-12-02 17:36:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:25,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:36:26,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:26,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197151776] [2023-12-02 17:36:26,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197151776] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:26,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:26,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:36:26,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184181748] [2023-12-02 17:36:26,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:26,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:36:26,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:26,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:36:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:36:26,085 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:26,125 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2023-12-02 17:36:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:36:26,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 17:36:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:26,127 INFO L225 Difference]: With dead ends: 32 [2023-12-02 17:36:26,127 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 17:36:26,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:36:26,129 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:26,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:36:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 17:36:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2023-12-02 17:36:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-12-02 17:36:26,135 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2023-12-02 17:36:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:26,135 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-12-02 17:36:26,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-12-02 17:36:26,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 17:36:26,136 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:26,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:36:26,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:36:26,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:26,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:26,137 INFO L85 PathProgramCache]: Analyzing trace with hash 697256444, now seen corresponding path program 1 times [2023-12-02 17:36:26,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:26,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776585134] [2023-12-02 17:36:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:26,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:36:26,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:26,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776585134] [2023-12-02 17:36:26,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776585134] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:26,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:26,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:36:26,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139554836] [2023-12-02 17:36:26,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:26,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:36:26,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:26,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:36:26,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:36:26,497 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:26,559 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-12-02 17:36:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:36:26,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 17:36:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:26,560 INFO L225 Difference]: With dead ends: 27 [2023-12-02 17:36:26,560 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 17:36:26,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:36:26,562 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:26,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:36:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 17:36:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2023-12-02 17:36:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-02 17:36:26,567 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2023-12-02 17:36:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:26,568 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-02 17:36:26,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:36:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-02 17:36:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 17:36:26,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:26,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:36:26,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:36:26,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:26,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:26,570 INFO L85 PathProgramCache]: Analyzing trace with hash -616977559, now seen corresponding path program 1 times [2023-12-02 17:36:26,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:26,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229592181] [2023-12-02 17:36:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:26,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:36:35,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:35,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229592181] [2023-12-02 17:36:35,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229592181] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:36:35,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969079252] [2023-12-02 17:36:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:35,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:36:35,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:35,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:36:35,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:36:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:35,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 17:36:35,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:36:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:36:38,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:37:36,011 WARN L293 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 370 DAG size of output: 376 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:37:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:37:36,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969079252] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:37:36,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1315714975] [2023-12-02 17:37:36,031 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 17:37:36,031 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:37:36,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:37:36,038 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:37:36,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:37:37,624 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:37:38,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '338#(and (= |ULTIMATE.start_main_~c1~0#1| 0) (= |ULTIMATE.start_assert_~arg#1| 0) (= |ULTIMATE.start_assert_#in~arg#1| 0) (= 0 |ULTIMATE.start_check_#res#1|))' at error location [2023-12-02 17:37:38,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:37:38,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:37:38,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 8] total 16 [2023-12-02 17:37:38,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013263506] [2023-12-02 17:37:38,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:37:38,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:37:38,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:37:38,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:37:38,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:37:38,918 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:37:50,156 WARN L293 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 450 DAG size of output: 423 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:37:57,176 WARN L293 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 454 DAG size of output: 438 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:37:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:59,315 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2023-12-02 17:37:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 17:37:59,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 17:37:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:59,317 INFO L225 Difference]: With dead ends: 85 [2023-12-02 17:37:59,317 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 17:37:59,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=341, Invalid=1219, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 17:37:59,318 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 113 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:59,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 64 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:37:59,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 17:37:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2023-12-02 17:37:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:37:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-12-02 17:37:59,331 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 14 [2023-12-02 17:37:59,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:59,331 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-12-02 17:37:59,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:37:59,331 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-12-02 17:37:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 17:37:59,332 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:59,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:37:59,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:37:59,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:37:59,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:59,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash -968135130, now seen corresponding path program 1 times [2023-12-02 17:37:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850203479] [2023-12-02 17:37:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:37:59,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:59,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850203479] [2023-12-02 17:37:59,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850203479] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:37:59,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886652886] [2023-12-02 17:37:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:59,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:37:59,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:37:59,904 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:37:59,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:37:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:59,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 17:38:00,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:38:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:38:00,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:38:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:38:01,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886652886] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:38:01,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [882377119] [2023-12-02 17:38:01,563 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 17:38:01,563 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:38:01,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:38:01,563 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:38:01,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:38:03,488 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:38:04,281 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '626#(and (<= 0 ~id3~0) (<= 1 |#StackHeapBarrier|) (<= 3 (mod ~r1~0 256)) (<= 0 ~id1~0) (= |ULTIMATE.start_main_~c1~0#1| 0) (= ~p2~0 0) (= (+ ~p1_new~0 1) 0) (= |ULTIMATE.start_init_#res#1| 1) (= |ULTIMATE.start_assert_~arg#1| 0) (= |ULTIMATE.start_main_~i2~0#1| 0) (= |ULTIMATE.start_assert_#in~arg#1| 0) (<= ~id1~0 127) (= (+ ~nomsg~0 1) 0) (<= ~id3~0 127) (<= 0 ~id2~0) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)) (= (+ ~p3_new~0 1) 0) (<= ~id2~0 127) (= 0 |ULTIMATE.start_check_#res#1|) (= ~p3~0 0) (= ~p1~0 0) (= (+ ~p2_new~0 1) 0))' at error location [2023-12-02 17:38:04,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:38:04,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:38:04,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 16 [2023-12-02 17:38:04,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727780905] [2023-12-02 17:38:04,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:38:04,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:38:04,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:38:04,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:38:04,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:38:04,283 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:38:04,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:38:04,751 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2023-12-02 17:38:04,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:38:04,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 17:38:04,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:38:04,753 INFO L225 Difference]: With dead ends: 104 [2023-12-02 17:38:04,753 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 17:38:04,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:38:04,755 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 80 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:38:04,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 87 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:38:04,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 17:38:04,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2023-12-02 17:38:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:38:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2023-12-02 17:38:04,766 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 16 [2023-12-02 17:38:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:38:04,766 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2023-12-02 17:38:04,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:38:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2023-12-02 17:38:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 17:38:04,767 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:38:04,767 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:38:04,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 17:38:04,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:38:04,968 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:38:04,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:38:04,968 INFO L85 PathProgramCache]: Analyzing trace with hash -967509519, now seen corresponding path program 1 times [2023-12-02 17:38:04,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:38:04,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593211009] [2023-12-02 17:38:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:38:04,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:38:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:38:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:38:07,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:38:07,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593211009] [2023-12-02 17:38:07,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593211009] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:38:07,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473400958] [2023-12-02 17:38:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:38:07,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:38:07,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:38:07,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:38:07,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:38:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:38:07,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 17:38:07,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:38:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:38:09,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:15,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2023-12-02 17:43:15,957 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-02 17:43:15,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2023-12-02 17:43:15,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598743552] [2023-12-02 17:43:15,960 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 17:43:15,961 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:43:15,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:43:15,961 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:43:15,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:43:15,965 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:332) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:223) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2023-12-02 17:43:15,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:43:15,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 17:43:15,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885297081] [2023-12-02 17:43:15,968 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:43:15,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:43:15,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:15,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:43:15,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:43:15,969 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:15,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:43:15,971 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:15,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:15,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 17:43:16,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 17:43:16,172 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-02 17:43:16,174 INFO L158 Benchmark]: Toolchain (without parser) took 412653.67ms. Allocated memory was 153.1MB in the beginning and 1.0GB in the end (delta: 851.4MB). Free memory was 107.1MB in the beginning and 491.4MB in the end (delta: -384.4MB). Peak memory consumption was 468.3MB. Max. memory is 16.1GB. [2023-12-02 17:43:16,174 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 111.1MB. Free memory is still 59.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 17:43:16,174 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.56ms. Allocated memory is still 153.1MB. Free memory was 107.1MB in the beginning and 93.6MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 17:43:16,175 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.28ms. Allocated memory is still 153.1MB. Free memory was 93.6MB in the beginning and 91.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:43:16,175 INFO L158 Benchmark]: Boogie Preprocessor took 27.53ms. Allocated memory is still 153.1MB. Free memory was 91.5MB in the beginning and 89.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:43:16,175 INFO L158 Benchmark]: RCFGBuilder took 667.53ms. Allocated memory is still 153.1MB. Free memory was 89.4MB in the beginning and 81.9MB in the end (delta: 7.5MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. [2023-12-02 17:43:16,175 INFO L158 Benchmark]: TraceAbstraction took 411639.83ms. Allocated memory was 153.1MB in the beginning and 1.0GB in the end (delta: 851.4MB). Free memory was 81.1MB in the beginning and 491.4MB in the end (delta: -410.3MB). Peak memory consumption was 441.9MB. Max. memory is 16.1GB. [2023-12-02 17:43:16,177 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 111.1MB. Free memory is still 59.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 274.56ms. Allocated memory is still 153.1MB. Free memory was 107.1MB in the beginning and 93.6MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.28ms. Allocated memory is still 153.1MB. Free memory was 93.6MB in the beginning and 91.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.53ms. Allocated memory is still 153.1MB. Free memory was 91.5MB in the beginning and 89.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 667.53ms. Allocated memory is still 153.1MB. Free memory was 89.4MB in the beginning and 81.9MB in the end (delta: 7.5MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. * TraceAbstraction took 411639.83ms. Allocated memory was 153.1MB in the beginning and 1.0GB in the end (delta: 851.4MB). Free memory was 81.1MB in the beginning and 491.4MB in the end (delta: -410.3MB). Peak memory consumption was 441.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/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_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/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_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/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 66e52001defd7e771c0df8c73cdf4ec6b3d90072c8faf9f52fce6d45ff1a83e7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:43:17,813 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:43:17,888 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 17:43:17,894 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:43:17,894 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:43:17,924 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:43:17,924 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:43:17,925 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:43:17,926 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:43:17,926 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:43:17,927 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:43:17,928 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:43:17,928 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:43:17,929 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:43:17,930 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:43:17,930 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:43:17,931 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:43:17,931 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:43:17,932 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:43:17,932 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:43:17,933 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:43:17,933 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:43:17,934 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:43:17,934 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:43:17,934 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 17:43:17,935 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 17:43:17,935 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 17:43:17,936 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:43:17,936 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:43:17,936 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:43:17,937 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:43:17,937 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 17:43:17,938 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:43:17,938 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:43:17,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:43:17,939 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:43:17,939 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:43:17,939 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:43:17,939 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 17:43:17,939 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:17,940 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:43:17,940 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:43:17,940 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:43:17,941 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:43:17,941 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_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66e52001defd7e771c0df8c73cdf4ec6b3d90072c8faf9f52fce6d45ff1a83e7 [2023-12-02 17:43:18,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:43:18,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:43:18,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:43:18,291 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:43:18,291 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:43:18,292 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2023-12-02 17:43:21,112 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:43:21,329 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:43:21,329 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2023-12-02 17:43:21,340 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/data/80209ecea/7e188f57e97045969596179cad4c687d/FLAGa0f235885 [2023-12-02 17:43:21,355 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/data/80209ecea/7e188f57e97045969596179cad4c687d [2023-12-02 17:43:21,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:43:21,360 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:43:21,361 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:43:21,361 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:43:21,366 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:43:21,367 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36bd6652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21, skipping insertion in model container [2023-12-02 17:43:21,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,401 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:43:21,602 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_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2023-12-02 17:43:21,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:43:21,621 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:43:21,661 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_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2023-12-02 17:43:21,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:43:21,679 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:43:21,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21 WrapperNode [2023-12-02 17:43:21,680 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:43:21,681 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:43:21,681 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:43:21,681 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:43:21,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,699 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,726 INFO L138 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 209 [2023-12-02 17:43:21,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:43:21,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:43:21,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:43:21,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:43:21,737 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,753 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,758 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,761 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,763 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,766 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:43:21,767 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:43:21,768 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:43:21,768 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:43:21,769 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (1/1) ... [2023-12-02 17:43:21,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:43:21,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:43:21,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:43:21,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:43:21,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:43:21,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 17:43:21,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:43:21,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:43:21,923 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:43:21,924 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:43:22,247 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:43:22,277 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:43:22,277 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 17:43:22,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:43:22 BoogieIcfgContainer [2023-12-02 17:43:22,278 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:43:22,281 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:43:22,281 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:43:22,283 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:43:22,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:43:21" (1/3) ... [2023-12-02 17:43:22,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1581f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:43:22, skipping insertion in model container [2023-12-02 17:43:22,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:21" (2/3) ... [2023-12-02 17:43:22,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1581f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:43:22, skipping insertion in model container [2023-12-02 17:43:22,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:43:22" (3/3) ... [2023-12-02 17:43:22,286 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2023-12-02 17:43:22,300 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:43:22,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:43:22,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:43:22,345 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;@17d7576, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:43:22,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:43:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 52 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:22,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 17:43:22,356 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:22,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:22,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:22,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:22,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1356555257, now seen corresponding path program 1 times [2023-12-02 17:43:22,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:22,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783764224] [2023-12-02 17:43:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:22,373 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 17:43:22,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:22,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:22,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 17:43:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:22,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 17:43:22,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:22,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:22,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:22,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783764224] [2023-12-02 17:43:22,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783764224] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:22,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:22,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:43:22,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405445533] [2023-12-02 17:43:22,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:22,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 17:43:22,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:22,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 17:43:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:43:22,542 INFO L87 Difference]: Start difference. First operand has 53 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 52 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:22,570 INFO L93 Difference]: Finished difference Result 85 states and 143 transitions. [2023-12-02 17:43:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 17:43:22,572 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 17:43:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:22,581 INFO L225 Difference]: With dead ends: 85 [2023-12-02 17:43:22,581 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 17:43:22,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:43:22,588 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:22,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 17:43:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-02 17:43:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 85 transitions. [2023-12-02 17:43:22,625 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 85 transitions. Word has length 16 [2023-12-02 17:43:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:22,625 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 85 transitions. [2023-12-02 17:43:22,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 85 transitions. [2023-12-02 17:43:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 17:43:22,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:22,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:22,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:43:22,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:22,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:22,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash 769749243, now seen corresponding path program 1 times [2023-12-02 17:43:22,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:22,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779084983] [2023-12-02 17:43:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:22,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:22,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:22,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:22,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 17:43:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:22,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:43:22,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:22,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:22,949 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:22,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779084983] [2023-12-02 17:43:22,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779084983] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:22,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:22,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:43:22,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695398456] [2023-12-02 17:43:22,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:22,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:43:22,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:22,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:43:22,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:43:22,954 INFO L87 Difference]: Start difference. First operand 51 states and 85 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:23,004 INFO L93 Difference]: Finished difference Result 85 states and 137 transitions. [2023-12-02 17:43:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:43:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 17:43:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:23,018 INFO L225 Difference]: With dead ends: 85 [2023-12-02 17:43:23,018 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 17:43:23,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:43:23,020 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:23,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 227 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:23,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 17:43:23,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-02 17:43:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-12-02 17:43:23,028 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 16 [2023-12-02 17:43:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:23,028 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-12-02 17:43:23,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-12-02 17:43:23,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 17:43:23,030 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:23,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:23,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-12-02 17:43:23,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:23,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:23,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:23,232 INFO L85 PathProgramCache]: Analyzing trace with hash 84756620, now seen corresponding path program 1 times [2023-12-02 17:43:23,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:23,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725351414] [2023-12-02 17:43:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:23,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:23,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:23,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:23,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 17:43:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:23,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:43:23,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:23,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:23,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:23,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725351414] [2023-12-02 17:43:23,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725351414] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:23,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:23,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:43:23,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161577391] [2023-12-02 17:43:23,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:23,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:43:23,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:23,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:43:23,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:43:23,563 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:23,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:23,679 INFO L93 Difference]: Finished difference Result 175 states and 265 transitions. [2023-12-02 17:43:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:43:23,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-02 17:43:23,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:23,682 INFO L225 Difference]: With dead ends: 175 [2023-12-02 17:43:23,683 INFO L226 Difference]: Without dead ends: 144 [2023-12-02 17:43:23,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:43:23,685 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 207 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:23,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 188 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:43:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-02 17:43:23,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 109. [2023-12-02 17:43:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.5) internal successors, (162), 108 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 162 transitions. [2023-12-02 17:43:23,702 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 162 transitions. Word has length 31 [2023-12-02 17:43:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:23,702 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 162 transitions. [2023-12-02 17:43:23,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:23,703 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 162 transitions. [2023-12-02 17:43:23,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 17:43:23,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:23,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:23,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 17:43:23,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:23,906 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:23,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:23,906 INFO L85 PathProgramCache]: Analyzing trace with hash -912973924, now seen corresponding path program 1 times [2023-12-02 17:43:23,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:23,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005893313] [2023-12-02 17:43:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:23,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:23,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:23,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:23,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 17:43:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:23,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:43:23,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:24,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:24,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:24,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005893313] [2023-12-02 17:43:24,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005893313] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:24,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:24,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:24,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272443912] [2023-12-02 17:43:24,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:24,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:24,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:24,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:24,025 INFO L87 Difference]: Start difference. First operand 109 states and 162 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:24,055 INFO L93 Difference]: Finished difference Result 271 states and 418 transitions. [2023-12-02 17:43:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:24,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-12-02 17:43:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:24,057 INFO L225 Difference]: With dead ends: 271 [2023-12-02 17:43:24,057 INFO L226 Difference]: Without dead ends: 182 [2023-12-02 17:43:24,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:24,059 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 28 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:24,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 103 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:24,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-12-02 17:43:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2023-12-02 17:43:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.5) internal successors, (264), 176 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 264 transitions. [2023-12-02 17:43:24,078 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 264 transitions. Word has length 33 [2023-12-02 17:43:24,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:24,079 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 264 transitions. [2023-12-02 17:43:24,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 264 transitions. [2023-12-02 17:43:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 17:43:24,081 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:24,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:24,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 17:43:24,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:24,282 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:24,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:24,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1815029063, now seen corresponding path program 1 times [2023-12-02 17:43:24,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:24,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184232409] [2023-12-02 17:43:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:24,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:24,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:24,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:24,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-02 17:43:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:24,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:43:24,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:24,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:24,359 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:24,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184232409] [2023-12-02 17:43:24,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184232409] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:24,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:24,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:43:24,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230720715] [2023-12-02 17:43:24,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:24,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:43:24,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:43:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:43:24,362 INFO L87 Difference]: Start difference. First operand 177 states and 264 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:24,393 INFO L93 Difference]: Finished difference Result 191 states and 281 transitions. [2023-12-02 17:43:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:43:24,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 17:43:24,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:24,396 INFO L225 Difference]: With dead ends: 191 [2023-12-02 17:43:24,396 INFO L226 Difference]: Without dead ends: 189 [2023-12-02 17:43:24,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:43:24,397 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:24,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 187 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-12-02 17:43:24,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2023-12-02 17:43:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.4728260869565217) internal successors, (271), 184 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 271 transitions. [2023-12-02 17:43:24,413 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 271 transitions. Word has length 34 [2023-12-02 17:43:24,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:24,414 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 271 transitions. [2023-12-02 17:43:24,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:24,414 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 271 transitions. [2023-12-02 17:43:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 17:43:24,416 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:24,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:24,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 17:43:24,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:24,619 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:24,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:24,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1381419564, now seen corresponding path program 1 times [2023-12-02 17:43:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:24,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233347620] [2023-12-02 17:43:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:24,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:24,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:24,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:24,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 17:43:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:24,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:43:24,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:24,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:24,715 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:24,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233347620] [2023-12-02 17:43:24,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233347620] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:24,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:24,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:24,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111944070] [2023-12-02 17:43:24,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:24,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:24,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:24,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:24,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:24,716 INFO L87 Difference]: Start difference. First operand 185 states and 271 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:24,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:24,743 INFO L93 Difference]: Finished difference Result 491 states and 731 transitions. [2023-12-02 17:43:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:24,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-02 17:43:24,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:24,746 INFO L225 Difference]: With dead ends: 491 [2023-12-02 17:43:24,747 INFO L226 Difference]: Without dead ends: 326 [2023-12-02 17:43:24,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:24,749 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:24,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 144 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:24,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-12-02 17:43:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 324. [2023-12-02 17:43:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.4643962848297214) internal successors, (473), 323 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 473 transitions. [2023-12-02 17:43:24,772 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 473 transitions. Word has length 35 [2023-12-02 17:43:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:24,772 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 473 transitions. [2023-12-02 17:43:24,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 473 transitions. [2023-12-02 17:43:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 17:43:24,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:24,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:24,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 17:43:24,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:24,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:24,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash -492686124, now seen corresponding path program 1 times [2023-12-02 17:43:24,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:24,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047190882] [2023-12-02 17:43:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:24,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:24,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:24,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:24,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-02 17:43:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:25,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:43:25,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:25,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:25,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:25,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047190882] [2023-12-02 17:43:25,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047190882] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:25,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:25,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:25,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014886247] [2023-12-02 17:43:25,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:25,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:25,062 INFO L87 Difference]: Start difference. First operand 324 states and 473 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:25,093 INFO L93 Difference]: Finished difference Result 884 states and 1295 transitions. [2023-12-02 17:43:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-02 17:43:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:25,097 INFO L225 Difference]: With dead ends: 884 [2023-12-02 17:43:25,097 INFO L226 Difference]: Without dead ends: 580 [2023-12-02 17:43:25,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:25,100 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 35 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:25,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 146 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-12-02 17:43:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 578. [2023-12-02 17:43:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.4367417677642982) internal successors, (829), 577 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 829 transitions. [2023-12-02 17:43:25,117 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 829 transitions. Word has length 35 [2023-12-02 17:43:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:25,118 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 829 transitions. [2023-12-02 17:43:25,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 829 transitions. [2023-12-02 17:43:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 17:43:25,119 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:25,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:25,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-12-02 17:43:25,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:25,320 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:25,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:25,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1137438489, now seen corresponding path program 1 times [2023-12-02 17:43:25,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:25,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339069347] [2023-12-02 17:43:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:25,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:25,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:25,322 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:25,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-12-02 17:43:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:25,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:43:25,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:25,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:25,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:25,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339069347] [2023-12-02 17:43:25,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339069347] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:25,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:25,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:25,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804044805] [2023-12-02 17:43:25,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:25,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:25,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:25,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:25,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:25,400 INFO L87 Difference]: Start difference. First operand 578 states and 829 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:25,435 INFO L93 Difference]: Finished difference Result 1161 states and 1699 transitions. [2023-12-02 17:43:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:25,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-02 17:43:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:25,440 INFO L225 Difference]: With dead ends: 1161 [2023-12-02 17:43:25,441 INFO L226 Difference]: Without dead ends: 834 [2023-12-02 17:43:25,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:25,442 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 36 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:25,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 145 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:25,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-12-02 17:43:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 832. [2023-12-02 17:43:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 1.4332129963898916) internal successors, (1191), 831 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1191 transitions. [2023-12-02 17:43:25,483 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1191 transitions. Word has length 37 [2023-12-02 17:43:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:25,483 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 1191 transitions. [2023-12-02 17:43:25,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:25,484 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1191 transitions. [2023-12-02 17:43:25,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 17:43:25,485 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:25,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:25,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-12-02 17:43:25,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:25,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:25,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:25,689 INFO L85 PathProgramCache]: Analyzing trace with hash 124429978, now seen corresponding path program 1 times [2023-12-02 17:43:25,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:25,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461350701] [2023-12-02 17:43:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:25,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:25,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:25,690 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:25,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-02 17:43:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:25,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 17:43:25,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:25,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:25,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:25,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461350701] [2023-12-02 17:43:25,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461350701] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:25,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:43:25,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:43:25,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073292774] [2023-12-02 17:43:25,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:25,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:25,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:25,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:25,786 INFO L87 Difference]: Start difference. First operand 832 states and 1191 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:25,814 INFO L93 Difference]: Finished difference Result 1427 states and 2061 transitions. [2023-12-02 17:43:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:25,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-02 17:43:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:25,817 INFO L225 Difference]: With dead ends: 1427 [2023-12-02 17:43:25,817 INFO L226 Difference]: Without dead ends: 617 [2023-12-02 17:43:25,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:43:25,819 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 34 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:25,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 143 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-12-02 17:43:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 615. [2023-12-02 17:43:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 1.4299674267100977) internal successors, (878), 614 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 878 transitions. [2023-12-02 17:43:25,838 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 878 transitions. Word has length 49 [2023-12-02 17:43:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:25,838 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 878 transitions. [2023-12-02 17:43:25,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 878 transitions. [2023-12-02 17:43:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 17:43:25,839 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:25,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:25,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-12-02 17:43:26,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:26,041 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:26,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash 854869599, now seen corresponding path program 1 times [2023-12-02 17:43:26,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:26,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821506731] [2023-12-02 17:43:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:26,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:26,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:26,042 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:26,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 17:43:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:26,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:43:26,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:26,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:27,102 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:27,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821506731] [2023-12-02 17:43:27,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821506731] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:27,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1127768139] [2023-12-02 17:43:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:27,103 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:27,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:43:27,110 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:43:27,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-12-02 17:43:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:27,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:43:27,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:27,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:27,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1127768139] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:27,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:43:27,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 8] total 17 [2023-12-02 17:43:27,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189676759] [2023-12-02 17:43:27,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:27,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:27,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:27,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:27,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:43:27,261 INFO L87 Difference]: Start difference. First operand 615 states and 878 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:27,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:27,283 INFO L93 Difference]: Finished difference Result 907 states and 1300 transitions. [2023-12-02 17:43:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:27,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-12-02 17:43:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:27,287 INFO L225 Difference]: With dead ends: 907 [2023-12-02 17:43:27,287 INFO L226 Difference]: Without dead ends: 329 [2023-12-02 17:43:27,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:43:27,289 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 27 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:27,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 128 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-12-02 17:43:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2023-12-02 17:43:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.3865030674846626) internal successors, (452), 326 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 452 transitions. [2023-12-02 17:43:27,302 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 452 transitions. Word has length 51 [2023-12-02 17:43:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:27,303 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 452 transitions. [2023-12-02 17:43:27,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 452 transitions. [2023-12-02 17:43:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 17:43:27,304 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:27,304 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:27,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2023-12-02 17:43:27,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-02 17:43:27,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:27,706 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:27,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash 797536337, now seen corresponding path program 1 times [2023-12-02 17:43:27,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:27,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363302992] [2023-12-02 17:43:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:27,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:27,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:27,708 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:27,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-12-02 17:43:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:27,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:43:27,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:28,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:28,650 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:28,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363302992] [2023-12-02 17:43:28,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363302992] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:28,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [219171223] [2023-12-02 17:43:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:28,651 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:28,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:43:28,652 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:43:28,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2023-12-02 17:43:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:28,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:43:28,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:28,793 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:28,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [219171223] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:28,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:43:28,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 8] total 17 [2023-12-02 17:43:28,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476418764] [2023-12-02 17:43:28,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:28,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:43:28,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:43:28,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:43:28,795 INFO L87 Difference]: Start difference. First operand 327 states and 452 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:28,813 INFO L93 Difference]: Finished difference Result 475 states and 661 transitions. [2023-12-02 17:43:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:43:28,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-12-02 17:43:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:28,815 INFO L225 Difference]: With dead ends: 475 [2023-12-02 17:43:28,815 INFO L226 Difference]: Without dead ends: 185 [2023-12-02 17:43:28,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:43:28,816 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 24 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:28,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:43:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-02 17:43:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2023-12-02 17:43:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.3296703296703296) internal successors, (242), 182 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 242 transitions. [2023-12-02 17:43:28,824 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 242 transitions. Word has length 53 [2023-12-02 17:43:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:28,824 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 242 transitions. [2023-12-02 17:43:28,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 242 transitions. [2023-12-02 17:43:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 17:43:28,825 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:28,826 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:28,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-12-02 17:43:29,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2023-12-02 17:43:29,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:29,227 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:29,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1479679805, now seen corresponding path program 1 times [2023-12-02 17:43:29,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:29,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859551363] [2023-12-02 17:43:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:29,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:29,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:29,228 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:29,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 17:43:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:29,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:43:29,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:29,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:30,042 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:30,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859551363] [2023-12-02 17:43:30,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859551363] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:30,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2147331263] [2023-12-02 17:43:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:30,043 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:30,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:43:30,044 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:43:30,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-12-02 17:43:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:30,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:43:30,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:43:30,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:30,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2147331263] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:30,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:43:30,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 8] total 19 [2023-12-02 17:43:30,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316974845] [2023-12-02 17:43:30,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:30,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:43:30,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:30,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:43:30,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:43:30,375 INFO L87 Difference]: Start difference. First operand 183 states and 242 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:30,464 INFO L93 Difference]: Finished difference Result 383 states and 520 transitions. [2023-12-02 17:43:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:43:30,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 17:43:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:30,466 INFO L225 Difference]: With dead ends: 383 [2023-12-02 17:43:30,467 INFO L226 Difference]: Without dead ends: 333 [2023-12-02 17:43:30,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:43:30,468 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 129 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:30,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 247 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:43:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-12-02 17:43:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 279. [2023-12-02 17:43:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.330935251798561) internal successors, (370), 278 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 370 transitions. [2023-12-02 17:43:30,480 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 370 transitions. Word has length 55 [2023-12-02 17:43:30,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:30,480 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 370 transitions. [2023-12-02 17:43:30,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:30,480 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 370 transitions. [2023-12-02 17:43:30,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 17:43:30,481 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:30,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:30,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-12-02 17:43:30,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2023-12-02 17:43:30,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:30,882 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:30,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2017491651, now seen corresponding path program 1 times [2023-12-02 17:43:30,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:30,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840031114] [2023-12-02 17:43:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:30,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:30,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:30,884 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:30,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-12-02 17:43:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:30,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:43:30,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:31,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:31,647 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840031114] [2023-12-02 17:43:31,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840031114] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [57152956] [2023-12-02 17:43:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:31,647 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:31,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:43:31,648 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:43:31,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-12-02 17:43:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:31,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:43:31,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:43:32,043 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:32,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [57152956] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:32,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:43:32,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 19 [2023-12-02 17:43:32,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566944348] [2023-12-02 17:43:32,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:32,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:43:32,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:43:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:43:32,045 INFO L87 Difference]: Start difference. First operand 279 states and 370 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:32,144 INFO L93 Difference]: Finished difference Result 431 states and 584 transitions. [2023-12-02 17:43:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:43:32,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 17:43:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:32,146 INFO L225 Difference]: With dead ends: 431 [2023-12-02 17:43:32,146 INFO L226 Difference]: Without dead ends: 285 [2023-12-02 17:43:32,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:43:32,147 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 123 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:32,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 250 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:43:32,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-12-02 17:43:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2023-12-02 17:43:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.3043478260869565) internal successors, (300), 230 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 300 transitions. [2023-12-02 17:43:32,158 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 300 transitions. Word has length 55 [2023-12-02 17:43:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:32,159 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 300 transitions. [2023-12-02 17:43:32,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 300 transitions. [2023-12-02 17:43:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 17:43:32,159 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:32,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:32,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-12-02 17:43:32,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2023-12-02 17:43:32,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:32,560 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:32,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:32,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1048580669, now seen corresponding path program 1 times [2023-12-02 17:43:32,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:32,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988454329] [2023-12-02 17:43:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:32,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:32,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:32,562 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:32,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 17:43:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:32,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:43:32,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:33,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:33,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988454329] [2023-12-02 17:43:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988454329] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1695039059] [2023-12-02 17:43:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:33,296 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:33,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:43:33,297 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:43:33,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2023-12-02 17:43:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:33,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:43:33,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:43:33,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:33,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1695039059] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:33,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:43:33,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 19 [2023-12-02 17:43:33,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771886557] [2023-12-02 17:43:33,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:33,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:43:33,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:33,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:43:33,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:43:33,668 INFO L87 Difference]: Start difference. First operand 231 states and 300 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:33,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:33,760 INFO L93 Difference]: Finished difference Result 383 states and 514 transitions. [2023-12-02 17:43:33,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:43:33,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 17:43:33,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:33,762 INFO L225 Difference]: With dead ends: 383 [2023-12-02 17:43:33,762 INFO L226 Difference]: Without dead ends: 333 [2023-12-02 17:43:33,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:43:33,763 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 107 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:33,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 293 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:43:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-12-02 17:43:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 279. [2023-12-02 17:43:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.3093525179856116) internal successors, (364), 278 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 364 transitions. [2023-12-02 17:43:33,772 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 364 transitions. Word has length 55 [2023-12-02 17:43:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:33,772 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 364 transitions. [2023-12-02 17:43:33,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 364 transitions. [2023-12-02 17:43:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 17:43:33,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:33,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:33,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 17:43:33,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2023-12-02 17:43:34,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:34,174 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:34,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1368007847, now seen corresponding path program 1 times [2023-12-02 17:43:34,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:34,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688653343] [2023-12-02 17:43:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:34,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:34,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:34,175 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:34,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-12-02 17:43:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:34,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:43:34,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:34,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:34,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:34,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688653343] [2023-12-02 17:43:34,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688653343] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:34,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1445357539] [2023-12-02 17:43:34,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:34,856 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:34,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:43:34,857 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:43:34,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-12-02 17:43:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:34,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:43:34,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:43:35,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:43:35,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1445357539] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:35,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475513114] [2023-12-02 17:43:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:35,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:43:35,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:43:35,146 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:43:35,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 17:43:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:35,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:43:35,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:43:35,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:35,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475513114] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:35,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:43:35,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4, 4, 4, 5] total 21 [2023-12-02 17:43:35,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144959939] [2023-12-02 17:43:35,390 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:43:35,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 17:43:35,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:35,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 17:43:35,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-12-02 17:43:35,392 INFO L87 Difference]: Start difference. First operand 279 states and 364 transitions. Second operand has 21 states, 21 states have (on average 10.666666666666666) internal successors, (224), 21 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:36,722 INFO L93 Difference]: Finished difference Result 1021 states and 1326 transitions. [2023-12-02 17:43:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:43:36,723 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 10.666666666666666) internal successors, (224), 21 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-12-02 17:43:36,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:36,726 INFO L225 Difference]: With dead ends: 1021 [2023-12-02 17:43:36,726 INFO L226 Difference]: Without dead ends: 779 [2023-12-02 17:43:36,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=483, Invalid=1587, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 17:43:36,727 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 741 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:36,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 395 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:43:36,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-12-02 17:43:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 653. [2023-12-02 17:43:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 1.2453987730061349) internal successors, (812), 652 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 812 transitions. [2023-12-02 17:43:36,765 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 812 transitions. Word has length 56 [2023-12-02 17:43:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:36,765 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 812 transitions. [2023-12-02 17:43:36,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.666666666666666) internal successors, (224), 21 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:36,766 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 812 transitions. [2023-12-02 17:43:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 17:43:36,766 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:36,767 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:36,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-12-02 17:43:36,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 17:43:37,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2023-12-02 17:43:37,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:37,368 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:37,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:37,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1095679797, now seen corresponding path program 1 times [2023-12-02 17:43:37,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:37,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039553661] [2023-12-02 17:43:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:37,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:37,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:37,369 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:37,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-02 17:43:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:37,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:43:37,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:37,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:38,007 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:38,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039553661] [2023-12-02 17:43:38,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039553661] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:38,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2107334023] [2023-12-02 17:43:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:38,007 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:43:38,008 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:43:38,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2023-12-02 17:43:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:38,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:43:38,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:38,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:38,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2107334023] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:38,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662689378] [2023-12-02 17:43:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:38,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:43:38,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:43:38,928 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:43:38,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 17:43:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:38,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:43:38,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:39,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:39,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662689378] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:39,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:43:39,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 8] total 37 [2023-12-02 17:43:39,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995899708] [2023-12-02 17:43:39,813 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:43:39,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 17:43:39,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:39,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 17:43:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:43:39,815 INFO L87 Difference]: Start difference. First operand 653 states and 812 transitions. Second operand has 37 states, 37 states have (on average 6.135135135135135) internal successors, (227), 37 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:42,895 INFO L93 Difference]: Finished difference Result 2495 states and 3124 transitions. [2023-12-02 17:43:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 17:43:42,896 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.135135135135135) internal successors, (227), 37 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-12-02 17:43:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:42,905 INFO L225 Difference]: With dead ends: 2495 [2023-12-02 17:43:42,905 INFO L226 Difference]: Without dead ends: 1902 [2023-12-02 17:43:42,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1014, Invalid=4536, Unknown=0, NotChecked=0, Total=5550 [2023-12-02 17:43:42,908 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1564 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:42,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1564 Valid, 720 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:43:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2023-12-02 17:43:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1696. [2023-12-02 17:43:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 1.2224188790560473) internal successors, (2072), 1695 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:43,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2072 transitions. [2023-12-02 17:43:43,012 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2072 transitions. Word has length 57 [2023-12-02 17:43:43,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:43,013 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2072 transitions. [2023-12-02 17:43:43,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.135135135135135) internal successors, (227), 37 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:43,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2072 transitions. [2023-12-02 17:43:43,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 17:43:43,013 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:43,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:43,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-12-02 17:43:43,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 17:43:43,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2023-12-02 17:43:43,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:43,614 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:43,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1957568041, now seen corresponding path program 1 times [2023-12-02 17:43:43,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:43,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462042] [2023-12-02 17:43:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:43,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:43,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:43,616 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:43,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-12-02 17:43:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:43,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:43:43,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:44,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:44,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:44,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462042] [2023-12-02 17:43:44,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462042] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:44,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [335045342] [2023-12-02 17:43:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:44,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:44,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:43:44,279 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:43:44,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2023-12-02 17:43:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:44,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:43:44,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:44,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:45,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [335045342] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:45,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57006380] [2023-12-02 17:43:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:45,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:43:45,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:43:45,231 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:43:45,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 17:43:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:45,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:43:45,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:46,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:46,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57006380] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:46,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:43:46,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 17:43:46,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849720172] [2023-12-02 17:43:46,261 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:43:46,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 17:43:46,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 17:43:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:43:46,262 INFO L87 Difference]: Start difference. First operand 1696 states and 2072 transitions. Second operand has 37 states, 37 states have (on average 6.837837837837838) internal successors, (253), 37 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:48,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:48,640 INFO L93 Difference]: Finished difference Result 3380 states and 4116 transitions. [2023-12-02 17:43:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:43:48,641 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.837837837837838) internal successors, (253), 37 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-12-02 17:43:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:48,649 INFO L225 Difference]: With dead ends: 3380 [2023-12-02 17:43:48,649 INFO L226 Difference]: Without dead ends: 1750 [2023-12-02 17:43:48,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=656, Invalid=3126, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 17:43:48,653 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 623 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:48,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 625 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:43:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2023-12-02 17:43:48,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1668. [2023-12-02 17:43:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1667 states have (on average 1.203359328134373) internal successors, (2006), 1667 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2006 transitions. [2023-12-02 17:43:48,773 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2006 transitions. Word has length 58 [2023-12-02 17:43:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:48,773 INFO L495 AbstractCegarLoop]: Abstraction has 1668 states and 2006 transitions. [2023-12-02 17:43:48,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.837837837837838) internal successors, (253), 37 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:43:48,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2006 transitions. [2023-12-02 17:43:48,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 17:43:48,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:48,774 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:48,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 17:43:48,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2023-12-02 17:43:49,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-12-02 17:43:49,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:49,375 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:49,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:49,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1993264091, now seen corresponding path program 1 times [2023-12-02 17:43:49,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:43:49,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502076590] [2023-12-02 17:43:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:49,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:43:49,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:43:49,377 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:43:49,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-12-02 17:43:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:49,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:43:49,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:49,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:50,117 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:43:50,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502076590] [2023-12-02 17:43:50,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502076590] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:50,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [264931200] [2023-12-02 17:43:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:50,117 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:43:50,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:43:50,118 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:43:50,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2023-12-02 17:43:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:50,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:43:50,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:54,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:56,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [264931200] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:56,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870472482] [2023-12-02 17:43:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:56,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:43:56,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:43:56,077 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:43:56,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 17:43:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:56,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 17:43:56,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:57,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:43:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:43:57,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870472482] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:43:57,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:43:57,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 21, 18, 10, 9] total 57 [2023-12-02 17:43:57,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955261197] [2023-12-02 17:43:57,396 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:43:57,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-02 17:43:57,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:43:57,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-02 17:43:57,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2728, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 17:43:57,399 INFO L87 Difference]: Start difference. First operand 1668 states and 2006 transitions. Second operand has 57 states, 57 states have (on average 4.315789473684211) internal successors, (246), 57 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:44:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:44:05,153 INFO L93 Difference]: Finished difference Result 6298 states and 7549 transitions. [2023-12-02 17:44:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-02 17:44:05,154 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.315789473684211) internal successors, (246), 57 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-12-02 17:44:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:44:05,176 INFO L225 Difference]: With dead ends: 6298 [2023-12-02 17:44:05,176 INFO L226 Difference]: Without dead ends: 4896 [2023-12-02 17:44:05,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3466 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2191, Invalid=8521, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 17:44:05,182 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1445 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1445 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:44:05,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1445 Valid, 968 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 17:44:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2023-12-02 17:44:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 2952. [2023-12-02 17:44:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 1.19586580820061) internal successors, (3529), 2951 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:44:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3529 transitions. [2023-12-02 17:44:05,396 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3529 transitions. Word has length 59 [2023-12-02 17:44:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:44:05,396 INFO L495 AbstractCegarLoop]: Abstraction has 2952 states and 3529 transitions. [2023-12-02 17:44:05,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.315789473684211) internal successors, (246), 57 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:44:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3529 transitions. [2023-12-02 17:44:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 17:44:05,398 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:44:05,398 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:44:05,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-02 17:44:05,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2023-12-02 17:44:05,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-12-02 17:44:05,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:44:05,999 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:44:06,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:44:06,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1896241502, now seen corresponding path program 1 times [2023-12-02 17:44:06,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:44:06,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799696154] [2023-12-02 17:44:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:06,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:44:06,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:44:06,001 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:44:06,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-12-02 17:44:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:06,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 17:44:06,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:44:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:44:07,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:44:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:44:08,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:44:08,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799696154] [2023-12-02 17:44:08,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799696154] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:44:08,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1268968446] [2023-12-02 17:44:08,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:08,610 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:44:08,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:44:08,611 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:44:08,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-12-02 17:44:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:08,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:44:08,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:44:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:44:12,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:44:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:44:14,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1268968446] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:44:14,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058416910] [2023-12-02 17:44:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:14,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:44:14,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:44:14,322 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:44:14,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 17:44:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:14,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 17:44:14,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:44:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:44:17,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:44:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:44:18,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058416910] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:44:18,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:44:18,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 22, 17, 16, 14] total 78 [2023-12-02 17:44:18,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231410737] [2023-12-02 17:44:18,220 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:44:18,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-12-02 17:44:18,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:44:18,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-12-02 17:44:18,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=5454, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 17:44:18,224 INFO L87 Difference]: Start difference. First operand 2952 states and 3529 transitions. Second operand has 78 states, 78 states have (on average 5.17948717948718) internal successors, (404), 78 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:22,018 INFO L93 Difference]: Finished difference Result 13340 states and 15787 transitions. [2023-12-02 17:46:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2023-12-02 17:46:22,019 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 5.17948717948718) internal successors, (404), 78 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2023-12-02 17:46:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:22,056 INFO L225 Difference]: With dead ends: 13340 [2023-12-02 17:46:22,056 INFO L226 Difference]: Without dead ends: 11148 [2023-12-02 17:46:22,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 879 GetRequests, 505 SyntacticMatches, 1 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57072 ImplicationChecksByTransitivity, 119.2s TimeCoverageRelationStatistics Valid=19082, Invalid=121168, Unknown=0, NotChecked=0, Total=140250 [2023-12-02 17:46:22,076 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 5439 mSDsluCounter, 5363 mSDsCounter, 0 mSdLazyCounter, 3414 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5439 SdHoareTripleChecker+Valid, 5544 SdHoareTripleChecker+Invalid, 3652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 3414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:22,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5439 Valid, 5544 Invalid, 3652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 3414 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-12-02 17:46:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11148 states. [2023-12-02 17:46:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11148 to 6807. [2023-12-02 17:46:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 6806 states have (on average 1.1902732882750515) internal successors, (8101), 6806 states have internal predecessors, (8101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 8101 transitions. [2023-12-02 17:46:22,673 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 8101 transitions. Word has length 98 [2023-12-02 17:46:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:22,673 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 8101 transitions. [2023-12-02 17:46:22,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 5.17948717948718) internal successors, (404), 78 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 8101 transitions. [2023-12-02 17:46:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 17:46:22,675 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:22,675 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:22,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2023-12-02 17:46:22,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-02 17:46:23,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2023-12-02 17:46:23,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 17:46:23,277 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:23,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:23,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1042894838, now seen corresponding path program 1 times [2023-12-02 17:46:23,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 17:46:23,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119958715] [2023-12-02 17:46:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:23,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 17:46:23,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 17:46:23,283 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 17:46:23,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-12-02 17:46:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:23,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:46:23,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:24,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:25,087 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 17:46:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119958715] [2023-12-02 17:46:25,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119958715] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1469955949] [2023-12-02 17:46:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:25,087 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 17:46:25,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 17:46:25,088 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 17:46:25,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2023-12-02 17:46:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:25,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 17:46:25,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:30,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:36,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1469955949] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:36,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599288069] [2023-12-02 17:46:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:36,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:36,002 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:36,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f586bfb4-a0ec-41bb-b95a-9149bd0b8e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 17:46:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:36,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 17:46:36,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:40,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:41,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599288069] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:41,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 17:46:41,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 27, 26, 16, 15] total 97 [2023-12-02 17:46:41,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263637931] [2023-12-02 17:46:41,874 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:41,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-12-02 17:46:41,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 17:46:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-12-02 17:46:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=851, Invalid=8461, Unknown=0, NotChecked=0, Total=9312 [2023-12-02 17:46:41,877 INFO L87 Difference]: Start difference. First operand 6807 states and 8101 transitions. Second operand has 97 states, 97 states have (on average 5.298969072164948) internal successors, (514), 97 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)