./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/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_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/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_230394fb-076a-4349-a276-2bb419e3a6c7/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 a44e961521da9b8f4535724e185f402d94bec27d495ab6df10e2b3c1ffa4513a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:17:25,554 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:17:25,618 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:17:25,622 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:17:25,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:17:25,648 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:17:25,648 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:17:25,649 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:17:25,650 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:17:25,650 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:17:25,651 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:17:25,651 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:17:25,652 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:17:25,652 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:17:25,653 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:17:25,653 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:17:25,654 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:17:25,654 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:17:25,655 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:17:25,655 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:17:25,656 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:17:25,659 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:17:25,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:17:25,660 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:17:25,660 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:17:25,661 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:17:25,661 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:17:25,661 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:17:25,662 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:17:25,662 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:17:25,662 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:17:25,663 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:17:25,663 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:17:25,663 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:17:25,664 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:17:25,664 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:17:25,664 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:17:25,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:17:25,664 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:17:25,665 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:17:25,665 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:17:25,665 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:17:25,665 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:17:25,665 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:17:25,666 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:17:25,666 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:17:25,666 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:17:25,666 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_230394fb-076a-4349-a276-2bb419e3a6c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a44e961521da9b8f4535724e185f402d94bec27d495ab6df10e2b3c1ffa4513a [2023-12-02 18:17:25,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:17:25,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:17:25,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:17:25,917 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:17:25,917 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:17:25,918 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c [2023-12-02 18:17:28,721 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:17:28,919 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:17:28,919 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c [2023-12-02 18:17:28,930 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/data/63706d2fb/eaf43403cd4d432fb3159634b447080c/FLAG7ede45d54 [2023-12-02 18:17:28,941 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/data/63706d2fb/eaf43403cd4d432fb3159634b447080c [2023-12-02 18:17:28,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:17:28,944 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:17:28,946 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:17:28,946 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:17:28,951 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:17:28,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:17:28" (1/1) ... [2023-12-02 18:17:28,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22505c80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:28, skipping insertion in model container [2023-12-02 18:17:28,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:17:28" (1/1) ... [2023-12-02 18:17:28,998 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:17:29,220 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_230394fb-076a-4349-a276-2bb419e3a6c7/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c[16936,16949] [2023-12-02 18:17:29,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:17:29,234 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:17:29,287 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_230394fb-076a-4349-a276-2bb419e3a6c7/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c[16936,16949] [2023-12-02 18:17:29,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:17:29,305 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:17:29,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29 WrapperNode [2023-12-02 18:17:29,305 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:17:29,307 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:17:29,307 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:17:29,307 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:17:29,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (1/1) ... [2023-12-02 18:17:29,325 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (1/1) ... [2023-12-02 18:17:29,353 INFO L138 Inliner]: procedures = 25, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 443 [2023-12-02 18:17:29,354 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:17:29,354 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:17:29,354 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:17:29,355 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:17:29,362 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (1/1) ... [2023-12-02 18:17:29,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (1/1) ... [2023-12-02 18:17:29,366 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (1/1) ... [2023-12-02 18:17:29,366 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (1/1) ... [2023-12-02 18:17:29,375 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (1/1) ... [2023-12-02 18:17:29,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (1/1) ... [2023-12-02 18:17:29,382 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (1/1) ... [2023-12-02 18:17:29,384 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (1/1) ... [2023-12-02 18:17:29,387 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:17:29,388 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:17:29,388 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:17:29,388 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:17:29,389 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (1/1) ... [2023-12-02 18:17:29,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:17:29,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:17:29,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:17:29,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:17:29,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:17:29,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:17:29,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:17:29,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:17:29,564 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:17:29,566 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:17:30,028 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:17:30,543 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:17:30,543 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:17:30,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:17:30 BoogieIcfgContainer [2023-12-02 18:17:30,544 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:17:30,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:17:30,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:17:30,549 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:17:30,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:17:28" (1/3) ... [2023-12-02 18:17:30,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c08022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:17:30, skipping insertion in model container [2023-12-02 18:17:30,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:17:29" (2/3) ... [2023-12-02 18:17:30,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c08022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:17:30, skipping insertion in model container [2023-12-02 18:17:30,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:17:30" (3/3) ... [2023-12-02 18:17:30,552 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c [2023-12-02 18:17:30,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:17:30,566 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:17:30,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:17:30,609 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;@17f72570, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:17:30,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:17:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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 18:17:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 18:17:30,618 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:17:30,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 18:17:30,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:17:30,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:17:30,623 INFO L85 PathProgramCache]: Analyzing trace with hash 24546294, now seen corresponding path program 1 times [2023-12-02 18:17:30,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:17:30,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96490514] [2023-12-02 18:17:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:17:30,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:17:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:17:32,668 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 18:17:32,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:17:32,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96490514] [2023-12-02 18:17:32,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96490514] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:17:32,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:17:32,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:17:32,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43946122] [2023-12-02 18:17:32,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:17:32,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:17:32,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:17:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:17:32,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:17:32,708 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:17:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:17:32,804 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2023-12-02 18:17:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:17:32,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-12-02 18:17:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:17:32,814 INFO L225 Difference]: With dead ends: 17 [2023-12-02 18:17:32,814 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 18:17:32,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 18:17:32,820 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:17:32,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:17:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 18:17:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-12-02 18:17:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 18:17:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-12-02 18:17:32,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2023-12-02 18:17:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:17:32,852 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-12-02 18:17:32,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:17:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-12-02 18:17:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:17:32,853 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:17:32,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 18:17:32,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:17:32,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:17:32,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:17:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1119654497, now seen corresponding path program 1 times [2023-12-02 18:17:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:17:32,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143943002] [2023-12-02 18:17:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:17:32,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:17:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:17:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:17:41,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:17:41,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143943002] [2023-12-02 18:17:41,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143943002] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:17:41,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507447717] [2023-12-02 18:17:41,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:17:41,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:17:41,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:17:41,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:17:41,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:17:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:17:41,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 18:17:41,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:17:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:17:51,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:19:41,904 WARN L293 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 373 DAG size of output: 651 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 18:27:40,712 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/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 18:27:40,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-12-02 18:27:40,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/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 18:27:40,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [58450621] [2023-12-02 18:27:40,731 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 18:27:40,731 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:27:40,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:27:40,738 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:27:40,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:27:40,755 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/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 18:27:40,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:27:40,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 18:27:40,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370705604] [2023-12-02 18:27:40,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 18:27:40,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:27:40,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:27:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:27:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:27:40,760 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:40,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:27:40,762 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 18:27:40,763 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 18:27:40,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-02 18:27:40,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:27:40,964 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_230394fb-076a-4349-a276-2bb419e3a6c7/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 18:27:40,967 INFO L158 Benchmark]: Toolchain (without parser) took 612022.53ms. Allocated memory was 146.8MB in the beginning and 1.1GB in the end (delta: 994.1MB). Free memory was 102.5MB in the beginning and 674.6MB in the end (delta: -572.0MB). Peak memory consumption was 422.4MB. Max. memory is 16.1GB. [2023-12-02 18:27:40,967 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 107.0MB. Free memory is still 56.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:27:40,967 INFO L158 Benchmark]: CACSL2BoogieTranslator took 360.17ms. Allocated memory is still 146.8MB. Free memory was 102.5MB in the beginning and 85.1MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-12-02 18:27:40,968 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.22ms. Allocated memory is still 146.8MB. Free memory was 85.1MB in the beginning and 81.9MB in the end (delta: 3.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:27:40,968 INFO L158 Benchmark]: Boogie Preprocessor took 33.23ms. Allocated memory is still 146.8MB. Free memory was 81.9MB in the beginning and 79.2MB in the end (delta: 2.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-12-02 18:27:40,968 INFO L158 Benchmark]: RCFGBuilder took 1156.42ms. Allocated memory was 146.8MB in the beginning and 180.4MB in the end (delta: 33.6MB). Free memory was 79.2MB in the beginning and 83.5MB in the end (delta: -4.4MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. [2023-12-02 18:27:40,969 INFO L158 Benchmark]: TraceAbstraction took 610419.68ms. Allocated memory was 180.4MB in the beginning and 1.1GB in the end (delta: 960.5MB). Free memory was 83.5MB in the beginning and 674.6MB in the end (delta: -591.1MB). Peak memory consumption was 369.4MB. Max. memory is 16.1GB. [2023-12-02 18:27:40,971 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 107.0MB. Free memory is still 56.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 360.17ms. Allocated memory is still 146.8MB. Free memory was 102.5MB in the beginning and 85.1MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.22ms. Allocated memory is still 146.8MB. Free memory was 85.1MB in the beginning and 81.9MB in the end (delta: 3.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.23ms. Allocated memory is still 146.8MB. Free memory was 81.9MB in the beginning and 79.2MB in the end (delta: 2.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1156.42ms. Allocated memory was 146.8MB in the beginning and 180.4MB in the end (delta: 33.6MB). Free memory was 79.2MB in the beginning and 83.5MB in the end (delta: -4.4MB). Peak memory consumption was 29.8MB. Max. memory is 16.1GB. * TraceAbstraction took 610419.68ms. Allocated memory was 180.4MB in the beginning and 1.1GB in the end (delta: 960.5MB). Free memory was 83.5MB in the beginning and 674.6MB in the end (delta: -591.1MB). Peak memory consumption was 369.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/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_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/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_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/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_230394fb-076a-4349-a276-2bb419e3a6c7/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 a44e961521da9b8f4535724e185f402d94bec27d495ab6df10e2b3c1ffa4513a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:27:42,688 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:27:42,766 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 18:27:42,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:27:42,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:27:42,798 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:27:42,798 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:27:42,799 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:27:42,799 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:27:42,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:27:42,800 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:27:42,801 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:27:42,801 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:27:42,802 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:27:42,803 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:27:42,803 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:27:42,804 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:27:42,805 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:27:42,805 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:27:42,806 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:27:42,806 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:27:42,807 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:27:42,807 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:27:42,808 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:27:42,808 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 18:27:42,809 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 18:27:42,809 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 18:27:42,810 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:27:42,810 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:27:42,810 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:27:42,811 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:27:42,811 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 18:27:42,811 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:27:42,812 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:27:42,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:27:42,812 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:27:42,812 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:27:42,813 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:27:42,813 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 18:27:42,813 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 18:27:42,813 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:27:42,813 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:27:42,814 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:27:42,814 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:27:42,814 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_230394fb-076a-4349-a276-2bb419e3a6c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a44e961521da9b8f4535724e185f402d94bec27d495ab6df10e2b3c1ffa4513a [2023-12-02 18:27:43,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:27:43,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:27:43,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:27:43,131 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:27:43,132 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:27:43,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c [2023-12-02 18:27:45,886 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:27:46,104 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:27:46,105 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c [2023-12-02 18:27:46,117 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/data/5774f14c3/525d97c3a80f4b7e943d39485883f17c/FLAG108143c4a [2023-12-02 18:27:46,131 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/data/5774f14c3/525d97c3a80f4b7e943d39485883f17c [2023-12-02 18:27:46,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:27:46,135 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:27:46,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:27:46,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:27:46,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:27:46,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27413593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46, skipping insertion in model container [2023-12-02 18:27:46,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,188 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:27:46,427 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_230394fb-076a-4349-a276-2bb419e3a6c7/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c[16936,16949] [2023-12-02 18:27:46,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:27:46,446 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:27:46,506 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_230394fb-076a-4349-a276-2bb419e3a6c7/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c[16936,16949] [2023-12-02 18:27:46,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:27:46,525 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:27:46,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46 WrapperNode [2023-12-02 18:27:46,526 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:27:46,527 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:27:46,527 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:27:46,527 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:27:46,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,549 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,584 INFO L138 Inliner]: procedures = 25, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 422 [2023-12-02 18:27:46,584 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:27:46,585 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:27:46,585 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:27:46,585 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:27:46,595 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,601 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,601 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,614 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,622 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,625 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,628 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,646 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:27:46,647 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:27:46,648 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:27:46,648 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:27:46,648 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (1/1) ... [2023-12-02 18:27:46,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:27:46,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:27:46,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:27:46,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:27:46,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:27:46,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 18:27:46,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:27:46,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:27:46,853 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:27:46,855 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:27:47,300 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:27:47,348 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:27:47,348 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:27:47,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:27:47 BoogieIcfgContainer [2023-12-02 18:27:47,349 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:27:47,351 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:27:47,351 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:27:47,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:27:47,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:27:46" (1/3) ... [2023-12-02 18:27:47,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a07eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:27:47, skipping insertion in model container [2023-12-02 18:27:47,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:27:46" (2/3) ... [2023-12-02 18:27:47,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a07eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:27:47, skipping insertion in model container [2023-12-02 18:27:47,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:27:47" (3/3) ... [2023-12-02 18:27:47,356 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c [2023-12-02 18:27:47,370 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:27:47,370 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:27:47,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:27:47,418 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;@340deef8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:27:47,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:27:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 114 states have (on average 1.7982456140350878) internal successors, (205), 115 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 18:27:47,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:47,431 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 18:27:47,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:47,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:47,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1951872268, now seen corresponding path program 1 times [2023-12-02 18:27:47,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:47,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123232842] [2023-12-02 18:27:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:47,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:27:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:47,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:47,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:47,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:27:47,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:47,631 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 18:27:47,632 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:47,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:47,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123232842] [2023-12-02 18:27:47,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123232842] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:47,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:27:47,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:27:47,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331134532] [2023-12-02 18:27:47,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:47,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:27:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:47,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:27:47,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:27:47,664 INFO L87 Difference]: Start difference. First operand has 116 states, 114 states have (on average 1.7982456140350878) internal successors, (205), 115 states have internal predecessors, (205), 0 states have call successors, (0), 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 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 18:27:47,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:47,768 INFO L93 Difference]: Finished difference Result 190 states and 327 transitions. [2023-12-02 18:27:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:27:47,771 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 18:27:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:47,779 INFO L225 Difference]: With dead ends: 190 [2023-12-02 18:27:47,779 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 18:27:47,781 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 18:27:47,784 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 0 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:47,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 550 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:27:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 18:27:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-12-02 18:27:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.407079646017699) internal successors, (159), 113 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 159 transitions. [2023-12-02 18:27:47,821 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 159 transitions. Word has length 34 [2023-12-02 18:27:47,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:47,821 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 159 transitions. [2023-12-02 18:27:47,828 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 18:27:47,828 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 159 transitions. [2023-12-02 18:27:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 18:27:47,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:47,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:27:47,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:48,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:48,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:48,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:48,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1418311254, now seen corresponding path program 1 times [2023-12-02 18:27:48,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:48,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836462264] [2023-12-02 18:27:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:48,037 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 18:27:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:48,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:48,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:48,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:27:48,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:48,276 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 18:27:48,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:48,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:48,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836462264] [2023-12-02 18:27:48,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836462264] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:48,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:27:48,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:27:48,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339138404] [2023-12-02 18:27:48,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:48,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:27:48,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:48,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:27:48,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:27:48,280 INFO L87 Difference]: Start difference. First operand 114 states and 159 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:48,312 INFO L93 Difference]: Finished difference Result 244 states and 373 transitions. [2023-12-02 18:27:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:27:48,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-12-02 18:27:48,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:48,315 INFO L225 Difference]: With dead ends: 244 [2023-12-02 18:27:48,315 INFO L226 Difference]: Without dead ends: 175 [2023-12-02 18:27:48,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 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 18:27:48,318 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 90 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:48,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 322 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:27:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-12-02 18:27:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2023-12-02 18:27:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.494186046511628) internal successors, (257), 172 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 257 transitions. [2023-12-02 18:27:48,335 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 257 transitions. Word has length 74 [2023-12-02 18:27:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:48,336 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 257 transitions. [2023-12-02 18:27:48,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 257 transitions. [2023-12-02 18:27:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 18:27:48,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:48,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:27:48,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 18:27:48,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:48,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:48,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash 209399157, now seen corresponding path program 1 times [2023-12-02 18:27:48,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:48,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588308477] [2023-12-02 18:27:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:48,542 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 18:27:48,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:48,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:48,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:48,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:27:48,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:50,145 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 18:27:50,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:50,146 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:50,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588308477] [2023-12-02 18:27:50,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588308477] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:50,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:27:50,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:27:50,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117581408] [2023-12-02 18:27:50,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:50,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:27:50,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:50,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:27:50,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:27:50,149 INFO L87 Difference]: Start difference. First operand 173 states and 257 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:50,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:50,401 INFO L93 Difference]: Finished difference Result 1069 states and 1741 transitions. [2023-12-02 18:27:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:27:50,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-12-02 18:27:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:50,409 INFO L225 Difference]: With dead ends: 1069 [2023-12-02 18:27:50,409 INFO L226 Difference]: Without dead ends: 941 [2023-12-02 18:27:50,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:27:50,413 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 907 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:50,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 968 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:27:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2023-12-02 18:27:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 299. [2023-12-02 18:27:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.5570469798657718) internal successors, (464), 298 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 464 transitions. [2023-12-02 18:27:50,450 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 464 transitions. Word has length 74 [2023-12-02 18:27:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:50,450 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 464 transitions. [2023-12-02 18:27:50,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 464 transitions. [2023-12-02 18:27:50,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 18:27:50,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:50,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:27:50,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:50,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:50,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:50,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:50,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2111620221, now seen corresponding path program 1 times [2023-12-02 18:27:50,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:50,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916063951] [2023-12-02 18:27:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:50,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:27:50,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:50,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:50,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:50,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:27:50,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:50,782 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 18:27:50,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:50,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:50,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916063951] [2023-12-02 18:27:50,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916063951] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:50,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:27:50,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:27:50,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157104818] [2023-12-02 18:27:50,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:50,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:27:50,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:27:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:27:50,785 INFO L87 Difference]: Start difference. First operand 299 states and 464 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:50,836 INFO L93 Difference]: Finished difference Result 313 states and 481 transitions. [2023-12-02 18:27:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:27:50,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-12-02 18:27:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:50,839 INFO L225 Difference]: With dead ends: 313 [2023-12-02 18:27:50,839 INFO L226 Difference]: Without dead ends: 311 [2023-12-02 18:27:50,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 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 18:27:50,841 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:50,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 458 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:27:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-12-02 18:27:50,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2023-12-02 18:27:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.542483660130719) internal successors, (472), 306 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 472 transitions. [2023-12-02 18:27:50,855 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 472 transitions. Word has length 75 [2023-12-02 18:27:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:50,856 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 472 transitions. [2023-12-02 18:27:50,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:50,856 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 472 transitions. [2023-12-02 18:27:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 18:27:50,858 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:50,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:27:50,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 18:27:51,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:51,064 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:51,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:51,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1034715555, now seen corresponding path program 1 times [2023-12-02 18:27:51,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:51,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222387564] [2023-12-02 18:27:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:51,066 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 18:27:51,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:51,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:51,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:51,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:27:51,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:51,298 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 18:27:51,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:51,299 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:51,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222387564] [2023-12-02 18:27:51,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222387564] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:51,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:27:51,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:27:51,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459070007] [2023-12-02 18:27:51,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:51,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:27:51,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:27:51,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:27:51,302 INFO L87 Difference]: Start difference. First operand 307 states and 472 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:51,327 INFO L93 Difference]: Finished difference Result 803 states and 1278 transitions. [2023-12-02 18:27:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:27:51,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-12-02 18:27:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:51,331 INFO L225 Difference]: With dead ends: 803 [2023-12-02 18:27:51,331 INFO L226 Difference]: Without dead ends: 541 [2023-12-02 18:27:51,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 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 18:27:51,333 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 75 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:51,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 266 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:27:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2023-12-02 18:27:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 539. [2023-12-02 18:27:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.5724907063197027) internal successors, (846), 538 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 846 transitions. [2023-12-02 18:27:51,355 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 846 transitions. Word has length 76 [2023-12-02 18:27:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:51,356 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 846 transitions. [2023-12-02 18:27:51,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:51,356 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 846 transitions. [2023-12-02 18:27:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 18:27:51,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:51,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:27:51,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-12-02 18:27:51,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:51,561 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:51,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:51,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1680632190, now seen corresponding path program 1 times [2023-12-02 18:27:51,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:51,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949996859] [2023-12-02 18:27:51,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:51,562 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 18:27:51,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:51,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:51,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:51,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:27:51,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:51,710 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 18:27:51,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:51,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:51,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949996859] [2023-12-02 18:27:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949996859] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:51,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:27:51,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:27:51,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119325442] [2023-12-02 18:27:51,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:51,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:27:51,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:51,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:27:51,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:27:51,713 INFO L87 Difference]: Start difference. First operand 539 states and 846 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:51,743 INFO L93 Difference]: Finished difference Result 1033 states and 1647 transitions. [2023-12-02 18:27:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:27:51,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-12-02 18:27:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:51,748 INFO L225 Difference]: With dead ends: 1033 [2023-12-02 18:27:51,748 INFO L226 Difference]: Without dead ends: 771 [2023-12-02 18:27:51,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 74 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 18:27:51,750 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 102 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:51,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 358 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:27:51,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2023-12-02 18:27:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 769. [2023-12-02 18:27:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 1.5807291666666667) internal successors, (1214), 768 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1214 transitions. [2023-12-02 18:27:51,793 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1214 transitions. Word has length 76 [2023-12-02 18:27:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:51,794 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 1214 transitions. [2023-12-02 18:27:51,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1214 transitions. [2023-12-02 18:27:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 18:27:51,795 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:51,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:27:51,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:51,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:51,996 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:51,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2045463766, now seen corresponding path program 1 times [2023-12-02 18:27:51,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:51,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698868927] [2023-12-02 18:27:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:51,997 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 18:27:51,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:51,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:51,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:52,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:27:52,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:52,146 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 18:27:52,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:52,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:52,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698868927] [2023-12-02 18:27:52,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698868927] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:52,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:27:52,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:27:52,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051689938] [2023-12-02 18:27:52,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:52,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:27:52,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:52,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:27:52,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:27:52,149 INFO L87 Difference]: Start difference. First operand 769 states and 1214 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:52,190 INFO L93 Difference]: Finished difference Result 2117 states and 3380 transitions. [2023-12-02 18:27:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:27:52,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-12-02 18:27:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:52,198 INFO L225 Difference]: With dead ends: 2117 [2023-12-02 18:27:52,199 INFO L226 Difference]: Without dead ends: 1395 [2023-12-02 18:27:52,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:27:52,201 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 82 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:52,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 316 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:27:52,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2023-12-02 18:27:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1393. [2023-12-02 18:27:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.5804597701149425) internal successors, (2200), 1392 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2200 transitions. [2023-12-02 18:27:52,249 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2200 transitions. Word has length 77 [2023-12-02 18:27:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:52,250 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 2200 transitions. [2023-12-02 18:27:52,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2200 transitions. [2023-12-02 18:27:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 18:27:52,251 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:52,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:27:52,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:52,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:52,454 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:52,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:52,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1775774794, now seen corresponding path program 1 times [2023-12-02 18:27:52,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:52,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893261147] [2023-12-02 18:27:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:52,455 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 18:27:52,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:52,456 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:52,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:52,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:27:52,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:52,608 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 18:27:52,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:52,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:52,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893261147] [2023-12-02 18:27:52,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893261147] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:52,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:27:52,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:27:52,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93888242] [2023-12-02 18:27:52,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:52,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:27:52,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:27:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:27:52,611 INFO L87 Difference]: Start difference. First operand 1393 states and 2200 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:52,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:52,674 INFO L93 Difference]: Finished difference Result 3893 states and 6170 transitions. [2023-12-02 18:27:52,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:27:52,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-12-02 18:27:52,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:52,688 INFO L225 Difference]: With dead ends: 3893 [2023-12-02 18:27:52,688 INFO L226 Difference]: Without dead ends: 2547 [2023-12-02 18:27:52,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:27:52,691 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 86 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:52,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 329 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:27:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2023-12-02 18:27:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2545. [2023-12-02 18:27:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2544 states have (on average 1.569182389937107) internal successors, (3992), 2544 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 3992 transitions. [2023-12-02 18:27:52,779 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 3992 transitions. Word has length 77 [2023-12-02 18:27:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:52,779 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 3992 transitions. [2023-12-02 18:27:52,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 3992 transitions. [2023-12-02 18:27:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 18:27:52,780 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:52,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:27:52,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-12-02 18:27:52,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:52,981 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:52,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:52,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1329434998, now seen corresponding path program 1 times [2023-12-02 18:27:52,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:52,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404748652] [2023-12-02 18:27:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:52,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:27:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:52,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:52,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:53,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:27:53,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:53,118 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 18:27:53,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:53,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:53,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404748652] [2023-12-02 18:27:53,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404748652] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:53,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:27:53,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:27:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482322530] [2023-12-02 18:27:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:53,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:27:53,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:27:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:27:53,120 INFO L87 Difference]: Start difference. First operand 2545 states and 3992 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:53,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:53,228 INFO L93 Difference]: Finished difference Result 7157 states and 11210 transitions. [2023-12-02 18:27:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:27:53,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-12-02 18:27:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:53,255 INFO L225 Difference]: With dead ends: 7157 [2023-12-02 18:27:53,255 INFO L226 Difference]: Without dead ends: 4659 [2023-12-02 18:27:53,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:27:53,260 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 94 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:53,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 345 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:27:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4659 states. [2023-12-02 18:27:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4659 to 4657. [2023-12-02 18:27:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 1.5498281786941581) internal successors, (7216), 4656 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 7216 transitions. [2023-12-02 18:27:53,425 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 7216 transitions. Word has length 77 [2023-12-02 18:27:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:53,425 INFO L495 AbstractCegarLoop]: Abstraction has 4657 states and 7216 transitions. [2023-12-02 18:27:53,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 7216 transitions. [2023-12-02 18:27:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 18:27:53,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:53,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:27:53,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 18:27:53,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:53,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:53,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:53,628 INFO L85 PathProgramCache]: Analyzing trace with hash -965134422, now seen corresponding path program 1 times [2023-12-02 18:27:53,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:53,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450938746] [2023-12-02 18:27:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:53,628 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 18:27:53,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:53,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:53,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:53,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:27:53,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:53,781 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 18:27:53,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:53,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:53,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450938746] [2023-12-02 18:27:53,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450938746] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:53,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:27:53,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:27:53,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496698620] [2023-12-02 18:27:53,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:53,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:27:53,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:53,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:27:53,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:27:53,784 INFO L87 Difference]: Start difference. First operand 4657 states and 7216 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:53,882 INFO L93 Difference]: Finished difference Result 13109 states and 20210 transitions. [2023-12-02 18:27:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:27:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-12-02 18:27:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:53,914 INFO L225 Difference]: With dead ends: 13109 [2023-12-02 18:27:53,914 INFO L226 Difference]: Without dead ends: 8499 [2023-12-02 18:27:53,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:27:53,920 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 98 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:53,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 358 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:27:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8499 states. [2023-12-02 18:27:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8499 to 8497. [2023-12-02 18:27:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8497 states, 8496 states have (on average 1.5235404896421845) internal successors, (12944), 8496 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8497 states to 8497 states and 12944 transitions. [2023-12-02 18:27:54,136 INFO L78 Accepts]: Start accepts. Automaton has 8497 states and 12944 transitions. Word has length 77 [2023-12-02 18:27:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:54,136 INFO L495 AbstractCegarLoop]: Abstraction has 8497 states and 12944 transitions. [2023-12-02 18:27:54,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 8497 states and 12944 transitions. [2023-12-02 18:27:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 18:27:54,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:54,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:54,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:54,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:54,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:54,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:54,341 INFO L85 PathProgramCache]: Analyzing trace with hash -284094702, now seen corresponding path program 1 times [2023-12-02 18:27:54,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:54,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936011692] [2023-12-02 18:27:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:54,342 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 18:27:54,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:54,343 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:54,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-02 18:27:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:54,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:27:54,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:27:55,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:27:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:27:55,978 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:55,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936011692] [2023-12-02 18:27:55,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936011692] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:27:55,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2029047729] [2023-12-02 18:27:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:55,979 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:27:55,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:27:55,981 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:27:55,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-12-02 18:27:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:56,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:27:56,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:27:56,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:56,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2029047729] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:56,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:27:56,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 18:27:56,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100863652] [2023-12-02 18:27:56,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:56,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:27:56,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:56,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:27:56,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:27:56,173 INFO L87 Difference]: Start difference. First operand 8497 states and 12944 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:56,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:56,324 INFO L93 Difference]: Finished difference Result 16949 states and 25842 transitions. [2023-12-02 18:27:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:27:56,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2023-12-02 18:27:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:56,361 INFO L225 Difference]: With dead ends: 16949 [2023-12-02 18:27:56,362 INFO L226 Difference]: Without dead ends: 8499 [2023-12-02 18:27:56,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:27:56,370 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 80 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:56,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 352 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:27:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8499 states. [2023-12-02 18:27:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8499 to 8497. [2023-12-02 18:27:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8497 states, 8496 states have (on average 1.512241054613936) internal successors, (12848), 8496 states have internal predecessors, (12848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:56,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8497 states to 8497 states and 12848 transitions. [2023-12-02 18:27:56,575 INFO L78 Accepts]: Start accepts. Automaton has 8497 states and 12848 transitions. Word has length 106 [2023-12-02 18:27:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:56,575 INFO L495 AbstractCegarLoop]: Abstraction has 8497 states and 12848 transitions. [2023-12-02 18:27:56,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:56,575 INFO L276 IsEmpty]: Start isEmpty. Operand 8497 states and 12848 transitions. [2023-12-02 18:27:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 18:27:56,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:56,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:27:56,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2023-12-02 18:27:56,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-12-02 18:27:56,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:56,978 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:56,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1503048371, now seen corresponding path program 1 times [2023-12-02 18:27:56,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:56,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074341370] [2023-12-02 18:27:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:56,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:27:56,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:56,980 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:56,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-12-02 18:27:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:57,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:27:57,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:27:57,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:27:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:27:58,255 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:27:58,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074341370] [2023-12-02 18:27:58,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074341370] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:27:58,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62401090] [2023-12-02 18:27:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:58,256 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:27:58,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:27:58,257 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:27:58,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-12-02 18:27:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:58,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:27:58,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:27:58,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:27:58,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [62401090] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:27:58,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:27:58,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 18:27:58,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446921074] [2023-12-02 18:27:58,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:27:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:27:58,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:27:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:27:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:27:58,419 INFO L87 Difference]: Start difference. First operand 8497 states and 12848 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:27:58,470 INFO L93 Difference]: Finished difference Result 12725 states and 19250 transitions. [2023-12-02 18:27:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:27:58,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2023-12-02 18:27:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:27:58,478 INFO L225 Difference]: With dead ends: 12725 [2023-12-02 18:27:58,478 INFO L226 Difference]: Without dead ends: 4275 [2023-12-02 18:27:58,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:27:58,488 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 74 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:27:58,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 333 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:27:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2023-12-02 18:27:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 4273. [2023-12-02 18:27:58,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 1.4981273408239701) internal successors, (6400), 4272 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 6400 transitions. [2023-12-02 18:27:58,597 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 6400 transitions. Word has length 106 [2023-12-02 18:27:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:27:58,597 INFO L495 AbstractCegarLoop]: Abstraction has 4273 states and 6400 transitions. [2023-12-02 18:27:58,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:27:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 6400 transitions. [2023-12-02 18:27:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 18:27:58,599 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:27:58,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:27:58,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-12-02 18:27:58,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2023-12-02 18:27:59,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:27:59,000 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:27:59,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:27:59,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1392947500, now seen corresponding path program 1 times [2023-12-02 18:27:59,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:27:59,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144427925] [2023-12-02 18:27:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:27:59,001 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 18:27:59,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:27:59,002 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:27:59,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-02 18:27:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:27:59,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:27:59,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:27:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:27:59,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:00,122 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:00,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144427925] [2023-12-02 18:28:00,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144427925] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:00,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [824981702] [2023-12-02 18:28:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:00,123 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:00,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:00,124 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:00,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-12-02 18:28:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:00,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:28:00,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:00,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:28:00,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [824981702] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:00,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:28:00,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 18:28:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717939436] [2023-12-02 18:28:00,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:00,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:28:00,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:28:00,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:28:00,294 INFO L87 Difference]: Start difference. First operand 4273 states and 6400 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:00,326 INFO L93 Difference]: Finished difference Result 6389 states and 9578 transitions. [2023-12-02 18:28:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:28:00,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2023-12-02 18:28:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:00,332 INFO L225 Difference]: With dead ends: 6389 [2023-12-02 18:28:00,332 INFO L226 Difference]: Without dead ends: 2163 [2023-12-02 18:28:00,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:28:00,336 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 68 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:00,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 311 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:28:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2023-12-02 18:28:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 2161. [2023-12-02 18:28:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 1.4814814814814814) internal successors, (3200), 2160 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:00,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 3200 transitions. [2023-12-02 18:28:00,401 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 3200 transitions. Word has length 106 [2023-12-02 18:28:00,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:00,402 INFO L495 AbstractCegarLoop]: Abstraction has 2161 states and 3200 transitions. [2023-12-02 18:28:00,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 3200 transitions. [2023-12-02 18:28:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 18:28:00,404 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:00,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:00,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 18:28:00,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2023-12-02 18:28:00,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:00,807 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:00,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash -886662155, now seen corresponding path program 1 times [2023-12-02 18:28:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388881768] [2023-12-02 18:28:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:00,808 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 18:28:00,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:00,808 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:00,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-12-02 18:28:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:00,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:28:00,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:01,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:01,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:01,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388881768] [2023-12-02 18:28:01,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388881768] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:01,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2068547350] [2023-12-02 18:28:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:01,892 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:01,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:01,893 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:01,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-12-02 18:28:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:02,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:28:02,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:02,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:28:02,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2068547350] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:02,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:28:02,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 18:28:02,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096792242] [2023-12-02 18:28:02,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:02,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:28:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:02,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:28:02,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:28:02,048 INFO L87 Difference]: Start difference. First operand 2161 states and 3200 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:02,081 INFO L93 Difference]: Finished difference Result 3221 states and 4778 transitions. [2023-12-02 18:28:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:28:02,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2023-12-02 18:28:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:02,084 INFO L225 Difference]: With dead ends: 3221 [2023-12-02 18:28:02,084 INFO L226 Difference]: Without dead ends: 1107 [2023-12-02 18:28:02,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:28:02,087 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 62 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:02,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 292 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:28:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2023-12-02 18:28:02,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1105. [2023-12-02 18:28:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.460144927536232) internal successors, (1612), 1104 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1612 transitions. [2023-12-02 18:28:02,115 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1612 transitions. Word has length 106 [2023-12-02 18:28:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:02,115 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1612 transitions. [2023-12-02 18:28:02,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:02,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1612 transitions. [2023-12-02 18:28:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 18:28:02,117 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:02,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:02,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2023-12-02 18:28:02,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-12-02 18:28:02,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:02,518 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:02,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1065460118, now seen corresponding path program 1 times [2023-12-02 18:28:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:02,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217421769] [2023-12-02 18:28:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:02,519 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 18:28:02,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:02,520 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:02,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-12-02 18:28:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:02,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:28:02,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:03,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:03,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:03,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217421769] [2023-12-02 18:28:03,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217421769] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:03,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [950685989] [2023-12-02 18:28:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:03,578 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:03,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:03,579 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:03,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-12-02 18:28:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:03,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:28:03,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:28:03,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:28:03,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [950685989] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:03,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267229119] [2023-12-02 18:28:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:03,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:28:03,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:28:03,981 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:28:03,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 18:28:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:04,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:28:04,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:28:04,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:28:04,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267229119] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:04,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:28:04,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4, 4, 4, 4] total 20 [2023-12-02 18:28:04,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739060735] [2023-12-02 18:28:04,306 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:28:04,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 18:28:04,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:04,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 18:28:04,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-12-02 18:28:04,308 INFO L87 Difference]: Start difference. First operand 1105 states and 1612 transitions. Second operand has 20 states, 20 states have (on average 19.25) internal successors, (385), 20 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:07,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:07,022 INFO L93 Difference]: Finished difference Result 8543 states and 12501 transitions. [2023-12-02 18:28:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 18:28:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.25) internal successors, (385), 20 states have internal predecessors, (385), 0 states have call successors, (0), 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 106 [2023-12-02 18:28:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:07,036 INFO L225 Difference]: With dead ends: 8543 [2023-12-02 18:28:07,036 INFO L226 Difference]: Without dead ends: 7821 [2023-12-02 18:28:07,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=882, Invalid=3278, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 18:28:07,040 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 5280 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5280 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:07,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5280 Valid, 1620 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 18:28:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7821 states. [2023-12-02 18:28:07,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7821 to 6477. [2023-12-02 18:28:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6477 states, 6476 states have (on average 1.4607782581840643) internal successors, (9460), 6476 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6477 states to 6477 states and 9460 transitions. [2023-12-02 18:28:07,235 INFO L78 Accepts]: Start accepts. Automaton has 6477 states and 9460 transitions. Word has length 106 [2023-12-02 18:28:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:07,236 INFO L495 AbstractCegarLoop]: Abstraction has 6477 states and 9460 transitions. [2023-12-02 18:28:07,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.25) internal successors, (385), 20 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6477 states and 9460 transitions. [2023-12-02 18:28:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 18:28:07,237 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:07,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:07,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 18:28:07,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2023-12-02 18:28:07,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 18:28:07,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:07,840 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:07,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash 266809497, now seen corresponding path program 1 times [2023-12-02 18:28:07,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:07,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990115785] [2023-12-02 18:28:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:07,841 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 18:28:07,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:07,842 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:07,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-12-02 18:28:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:07,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:28:07,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:07,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:28:07,946 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:07,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990115785] [2023-12-02 18:28:07,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990115785] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:07,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:28:07,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:28:07,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615941322] [2023-12-02 18:28:07,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:07,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:28:07,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:07,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:28:07,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:28:07,948 INFO L87 Difference]: Start difference. First operand 6477 states and 9460 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:08,013 INFO L93 Difference]: Finished difference Result 9273 states and 13498 transitions. [2023-12-02 18:28:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:28:08,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-12-02 18:28:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:08,017 INFO L225 Difference]: With dead ends: 9273 [2023-12-02 18:28:08,017 INFO L226 Difference]: Without dead ends: 2843 [2023-12-02 18:28:08,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 105 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 18:28:08,021 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 40 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:08,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 291 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:28:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2023-12-02 18:28:08,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2781. [2023-12-02 18:28:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2781 states, 2780 states have (on average 1.427338129496403) internal successors, (3968), 2780 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2781 states to 2781 states and 3968 transitions. [2023-12-02 18:28:08,074 INFO L78 Accepts]: Start accepts. Automaton has 2781 states and 3968 transitions. Word has length 107 [2023-12-02 18:28:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:08,074 INFO L495 AbstractCegarLoop]: Abstraction has 2781 states and 3968 transitions. [2023-12-02 18:28:08,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2781 states and 3968 transitions. [2023-12-02 18:28:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 18:28:08,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:08,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:08,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-12-02 18:28:08,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:08,276 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:08,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1149916516, now seen corresponding path program 1 times [2023-12-02 18:28:08,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:08,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752301297] [2023-12-02 18:28:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:08,277 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 18:28:08,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:08,278 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:08,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:08,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:28:08,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:09,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:09,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:09,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752301297] [2023-12-02 18:28:09,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752301297] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:09,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1242602939] [2023-12-02 18:28:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:09,467 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:09,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:09,467 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:09,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2023-12-02 18:28:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:09,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:28:09,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:28:10,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:28:10,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1242602939] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:10,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:28:10,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 22 [2023-12-02 18:28:10,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119546032] [2023-12-02 18:28:10,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:10,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:28:10,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:10,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:28:10,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:10,862 INFO L87 Difference]: Start difference. First operand 2781 states and 3968 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:11,203 INFO L93 Difference]: Finished difference Result 10482 states and 15135 transitions. [2023-12-02 18:28:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:28:11,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-12-02 18:28:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:11,213 INFO L225 Difference]: With dead ends: 10482 [2023-12-02 18:28:11,214 INFO L226 Difference]: Without dead ends: 9186 [2023-12-02 18:28:11,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:11,216 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 617 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:11,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1497 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:28:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9186 states. [2023-12-02 18:28:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9186 to 4075. [2023-12-02 18:28:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4075 states, 4074 states have (on average 1.4229258713794797) internal successors, (5797), 4074 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 5797 transitions. [2023-12-02 18:28:11,348 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 5797 transitions. Word has length 107 [2023-12-02 18:28:11,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:11,348 INFO L495 AbstractCegarLoop]: Abstraction has 4075 states and 5797 transitions. [2023-12-02 18:28:11,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 5797 transitions. [2023-12-02 18:28:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 18:28:11,349 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:11,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:11,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:11,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2023-12-02 18:28:11,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:11,750 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:11,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash 525072448, now seen corresponding path program 1 times [2023-12-02 18:28:11,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:11,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916701600] [2023-12-02 18:28:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:11,751 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 18:28:11,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:11,752 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:11,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-12-02 18:28:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:11,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:28:11,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:11,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:28:11,863 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:11,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916701600] [2023-12-02 18:28:11,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916701600] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:11,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:28:11,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:28:11,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790568805] [2023-12-02 18:28:11,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:11,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:28:11,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:28:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:28:11,865 INFO L87 Difference]: Start difference. First operand 4075 states and 5797 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:11,986 INFO L93 Difference]: Finished difference Result 10589 states and 15065 transitions. [2023-12-02 18:28:11,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:28:11,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-12-02 18:28:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:11,994 INFO L225 Difference]: With dead ends: 10589 [2023-12-02 18:28:11,994 INFO L226 Difference]: Without dead ends: 6702 [2023-12-02 18:28:11,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 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 18:28:11,997 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 79 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:11,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 304 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:28:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6702 states. [2023-12-02 18:28:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6702 to 6700. [2023-12-02 18:28:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.406329302881027) internal successors, (9421), 6699 states have internal predecessors, (9421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9421 transitions. [2023-12-02 18:28:12,138 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9421 transitions. Word has length 108 [2023-12-02 18:28:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:12,138 INFO L495 AbstractCegarLoop]: Abstraction has 6700 states and 9421 transitions. [2023-12-02 18:28:12,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:12,139 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9421 transitions. [2023-12-02 18:28:12,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 18:28:12,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:12,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:12,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-12-02 18:28:12,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:12,343 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:12,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:12,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1301418232, now seen corresponding path program 1 times [2023-12-02 18:28:12,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:12,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889397026] [2023-12-02 18:28:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:12,344 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 18:28:12,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:12,345 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:12,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:12,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:28:12,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:13,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:13,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:13,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889397026] [2023-12-02 18:28:13,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889397026] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:13,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1990730069] [2023-12-02 18:28:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:13,362 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:13,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:13,363 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:13,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2023-12-02 18:28:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:13,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:28:13,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:28:14,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:28:14,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1990730069] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:14,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:28:14,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-12-02 18:28:14,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895280743] [2023-12-02 18:28:14,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:14,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:28:14,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:14,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:28:14,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:14,695 INFO L87 Difference]: Start difference. First operand 6700 states and 9421 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:15,132 INFO L93 Difference]: Finished difference Result 20520 states and 29190 transitions. [2023-12-02 18:28:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:28:15,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-12-02 18:28:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:15,149 INFO L225 Difference]: With dead ends: 20520 [2023-12-02 18:28:15,149 INFO L226 Difference]: Without dead ends: 17970 [2023-12-02 18:28:15,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:15,153 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 816 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:15,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 1060 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:28:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17970 states. [2023-12-02 18:28:15,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17970 to 9234. [2023-12-02 18:28:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9234 states, 9233 states have (on average 1.4024694032275533) internal successors, (12949), 9233 states have internal predecessors, (12949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9234 states to 9234 states and 12949 transitions. [2023-12-02 18:28:15,431 INFO L78 Accepts]: Start accepts. Automaton has 9234 states and 12949 transitions. Word has length 108 [2023-12-02 18:28:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:15,431 INFO L495 AbstractCegarLoop]: Abstraction has 9234 states and 12949 transitions. [2023-12-02 18:28:15,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 9234 states and 12949 transitions. [2023-12-02 18:28:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 18:28:15,433 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:15,433 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:15,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:15,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2023-12-02 18:28:15,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:15,834 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:15,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash -861137162, now seen corresponding path program 1 times [2023-12-02 18:28:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:15,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454030753] [2023-12-02 18:28:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:15,835 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 18:28:15,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:15,835 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:15,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-12-02 18:28:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:15,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:28:15,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:16,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:16,739 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:16,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454030753] [2023-12-02 18:28:16,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454030753] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:16,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1713097913] [2023-12-02 18:28:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:16,739 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:16,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:16,740 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:16,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-12-02 18:28:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:16,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:28:16,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:28:17,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:28:17,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1713097913] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:17,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:28:17,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-12-02 18:28:17,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038868560] [2023-12-02 18:28:17,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:17,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:28:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:17,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:28:17,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:17,994 INFO L87 Difference]: Start difference. First operand 9234 states and 12949 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:18,448 INFO L93 Difference]: Finished difference Result 22860 states and 32440 transitions. [2023-12-02 18:28:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:28:18,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 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 108 [2023-12-02 18:28:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:18,461 INFO L225 Difference]: With dead ends: 22860 [2023-12-02 18:28:18,462 INFO L226 Difference]: Without dead ends: 20480 [2023-12-02 18:28:18,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:18,466 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 610 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:18,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 1450 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:28:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20480 states. [2023-12-02 18:28:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20480 to 11612. [2023-12-02 18:28:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11612 states, 11611 states have (on average 1.3996210490052536) internal successors, (16251), 11611 states have internal predecessors, (16251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11612 states to 11612 states and 16251 transitions. [2023-12-02 18:28:18,752 INFO L78 Accepts]: Start accepts. Automaton has 11612 states and 16251 transitions. Word has length 108 [2023-12-02 18:28:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:18,752 INFO L495 AbstractCegarLoop]: Abstraction has 11612 states and 16251 transitions. [2023-12-02 18:28:18,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 11612 states and 16251 transitions. [2023-12-02 18:28:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 18:28:18,753 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:18,754 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:18,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-12-02 18:28:18,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2023-12-02 18:28:19,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:19,154 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:19,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:19,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1631898612, now seen corresponding path program 1 times [2023-12-02 18:28:19,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:19,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946868095] [2023-12-02 18:28:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:19,155 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 18:28:19,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:19,156 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:19,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-12-02 18:28:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:19,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:28:19,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:20,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:20,235 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:20,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946868095] [2023-12-02 18:28:20,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946868095] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:20,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1693895763] [2023-12-02 18:28:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:20,235 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:20,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:20,236 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:20,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2023-12-02 18:28:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:20,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:28:20,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:28:21,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:28:21,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1693895763] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:21,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:28:21,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-12-02 18:28:21,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385311313] [2023-12-02 18:28:21,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:21,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:28:21,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:21,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:28:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:21,701 INFO L87 Difference]: Start difference. First operand 11612 states and 16251 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:22,205 INFO L93 Difference]: Finished difference Result 25386 states and 35944 transitions. [2023-12-02 18:28:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:28:22,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-12-02 18:28:22,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:22,248 INFO L225 Difference]: With dead ends: 25386 [2023-12-02 18:28:22,248 INFO L226 Difference]: Without dead ends: 22836 [2023-12-02 18:28:22,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:22,252 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 946 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:22,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 1060 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:28:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22836 states. [2023-12-02 18:28:22,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22836 to 14100. [2023-12-02 18:28:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14100 states, 14099 states have (on average 1.3974749982268246) internal successors, (19703), 14099 states have internal predecessors, (19703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:22,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14100 states to 14100 states and 19703 transitions. [2023-12-02 18:28:22,575 INFO L78 Accepts]: Start accepts. Automaton has 14100 states and 19703 transitions. Word has length 108 [2023-12-02 18:28:22,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:22,576 INFO L495 AbstractCegarLoop]: Abstraction has 14100 states and 19703 transitions. [2023-12-02 18:28:22,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:22,576 INFO L276 IsEmpty]: Start isEmpty. Operand 14100 states and 19703 transitions. [2023-12-02 18:28:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 18:28:22,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:22,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:22,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2023-12-02 18:28:22,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2023-12-02 18:28:22,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:22,978 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:22,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:22,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1007398898, now seen corresponding path program 1 times [2023-12-02 18:28:22,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:22,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923673186] [2023-12-02 18:28:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:22,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:28:22,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:22,980 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:22,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:23,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:28:23,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:23,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:24,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:24,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923673186] [2023-12-02 18:28:24,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923673186] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:24,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262706712] [2023-12-02 18:28:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:24,027 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:24,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:24,028 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:24,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-12-02 18:28:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:24,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:28:24,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:24,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:28:24,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [262706712] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:24,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:28:24,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 18:28:24,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695878136] [2023-12-02 18:28:24,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:24,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:28:24,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:28:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:28:24,175 INFO L87 Difference]: Start difference. First operand 14100 states and 19703 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:24,564 INFO L93 Difference]: Finished difference Result 33367 states and 46516 transitions. [2023-12-02 18:28:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:28:24,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-12-02 18:28:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:24,578 INFO L225 Difference]: With dead ends: 33367 [2023-12-02 18:28:24,578 INFO L226 Difference]: Without dead ends: 20496 [2023-12-02 18:28:24,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:28:24,588 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 76 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:24,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 354 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:28:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20496 states. [2023-12-02 18:28:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20496 to 20428. [2023-12-02 18:28:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20428 states, 20427 states have (on average 1.3766093895334606) internal successors, (28120), 20427 states have internal predecessors, (28120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20428 states to 20428 states and 28120 transitions. [2023-12-02 18:28:25,101 INFO L78 Accepts]: Start accepts. Automaton has 20428 states and 28120 transitions. Word has length 108 [2023-12-02 18:28:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:25,102 INFO L495 AbstractCegarLoop]: Abstraction has 20428 states and 28120 transitions. [2023-12-02 18:28:25,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 20428 states and 28120 transitions. [2023-12-02 18:28:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 18:28:25,104 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:25,104 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:25,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2023-12-02 18:28:25,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 18:28:25,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:25,504 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:25,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:25,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1761134086, now seen corresponding path program 1 times [2023-12-02 18:28:25,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:25,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132911482] [2023-12-02 18:28:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:25,505 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 18:28:25,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:25,506 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:25,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-12-02 18:28:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:25,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:28:25,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:26,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:26,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:26,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132911482] [2023-12-02 18:28:26,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132911482] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:26,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1806727453] [2023-12-02 18:28:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:26,598 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:26,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:26,599 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:26,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-02 18:28:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:26,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:28:26,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:28:28,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:28:28,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1806727453] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:28,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:28:28,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 22 [2023-12-02 18:28:28,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705506188] [2023-12-02 18:28:28,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:28,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:28:28,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:28:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:28,116 INFO L87 Difference]: Start difference. First operand 20428 states and 28120 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:28,853 INFO L93 Difference]: Finished difference Result 40393 states and 56252 transitions. [2023-12-02 18:28:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:28:28,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-12-02 18:28:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:28,878 INFO L225 Difference]: With dead ends: 40393 [2023-12-02 18:28:28,879 INFO L226 Difference]: Without dead ends: 36727 [2023-12-02 18:28:28,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:28,885 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 683 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:28,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 1266 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:28:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36727 states. [2023-12-02 18:28:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36727 to 24126. [2023-12-02 18:28:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24126 states, 24125 states have (on average 1.375917098445596) internal successors, (33194), 24125 states have internal predecessors, (33194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24126 states to 24126 states and 33194 transitions. [2023-12-02 18:28:29,484 INFO L78 Accepts]: Start accepts. Automaton has 24126 states and 33194 transitions. Word has length 108 [2023-12-02 18:28:29,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:29,485 INFO L495 AbstractCegarLoop]: Abstraction has 24126 states and 33194 transitions. [2023-12-02 18:28:29,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 24126 states and 33194 transitions. [2023-12-02 18:28:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 18:28:29,487 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:29,487 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:29,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 18:28:29,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2023-12-02 18:28:29,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:29,888 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:29,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:29,888 INFO L85 PathProgramCache]: Analyzing trace with hash -765125918, now seen corresponding path program 1 times [2023-12-02 18:28:29,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:29,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131087019] [2023-12-02 18:28:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:29,889 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 18:28:29,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:29,890 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:29,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2023-12-02 18:28:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:29,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:28:29,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:30,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:30,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:30,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131087019] [2023-12-02 18:28:30,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131087019] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:30,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1680025423] [2023-12-02 18:28:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:30,942 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:30,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:30,943 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:30,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2023-12-02 18:28:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:31,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:28:31,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:28:32,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:28:32,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1680025423] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:28:32,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:28:32,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 22 [2023-12-02 18:28:32,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162223291] [2023-12-02 18:28:32,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:28:32,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:28:32,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:28:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:32,315 INFO L87 Difference]: Start difference. First operand 24126 states and 33194 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:33,284 INFO L93 Difference]: Finished difference Result 43041 states and 59832 transitions. [2023-12-02 18:28:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:28:33,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2023-12-02 18:28:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:33,321 INFO L225 Difference]: With dead ends: 43041 [2023-12-02 18:28:33,322 INFO L226 Difference]: Without dead ends: 39811 [2023-12-02 18:28:33,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:28:33,329 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 663 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:33,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1275 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:28:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39811 states. [2023-12-02 18:28:34,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39811 to 27210. [2023-12-02 18:28:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27210 states, 27209 states have (on average 1.3746186923444448) internal successors, (37402), 27209 states have internal predecessors, (37402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27210 states to 27210 states and 37402 transitions. [2023-12-02 18:28:34,047 INFO L78 Accepts]: Start accepts. Automaton has 27210 states and 37402 transitions. Word has length 109 [2023-12-02 18:28:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:34,048 INFO L495 AbstractCegarLoop]: Abstraction has 27210 states and 37402 transitions. [2023-12-02 18:28:34,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 27210 states and 37402 transitions. [2023-12-02 18:28:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 18:28:34,050 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:34,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:34,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2023-12-02 18:28:34,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2023-12-02 18:28:34,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:34,451 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:34,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:34,452 INFO L85 PathProgramCache]: Analyzing trace with hash -264273110, now seen corresponding path program 1 times [2023-12-02 18:28:34,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:34,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069358611] [2023-12-02 18:28:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:34,452 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 18:28:34,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:34,453 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:34,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2023-12-02 18:28:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:34,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:28:34,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:35,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:35,536 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069358611] [2023-12-02 18:28:35,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069358611] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1084390982] [2023-12-02 18:28:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:35,536 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:35,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:35,537 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:35,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2023-12-02 18:28:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:35,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:28:35,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:36,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:36,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1084390982] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:36,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484749325] [2023-12-02 18:28:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:36,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:28:36,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:28:36,855 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:28:36,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 18:28:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:36,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:28:36,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:37,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:38,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484749325] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:38,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:28:38,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 8] total 37 [2023-12-02 18:28:38,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052409483] [2023-12-02 18:28:38,236 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:28:38,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 18:28:38,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:38,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 18:28:38,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 18:28:38,238 INFO L87 Difference]: Start difference. First operand 27210 states and 37402 transitions. Second operand has 37 states, 37 states have (on average 11.91891891891892) internal successors, (441), 37 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:28:46,826 INFO L93 Difference]: Finished difference Result 136897 states and 188807 transitions. [2023-12-02 18:28:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-12-02 18:28:46,826 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 11.91891891891892) internal successors, (441), 37 states have internal predecessors, (441), 0 states have call successors, (0), 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 110 [2023-12-02 18:28:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:28:46,907 INFO L225 Difference]: With dead ends: 136897 [2023-12-02 18:28:46,907 INFO L226 Difference]: Without dead ends: 110166 [2023-12-02 18:28:46,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 619 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2588, Invalid=11218, Unknown=0, NotChecked=0, Total=13806 [2023-12-02 18:28:46,931 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 5032 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5032 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:28:46,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5032 Valid, 1990 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 18:28:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110166 states. [2023-12-02 18:28:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110166 to 76447. [2023-12-02 18:28:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76447 states, 76446 states have (on average 1.3650812338121026) internal successors, (104355), 76446 states have internal predecessors, (104355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76447 states to 76447 states and 104355 transitions. [2023-12-02 18:28:49,469 INFO L78 Accepts]: Start accepts. Automaton has 76447 states and 104355 transitions. Word has length 110 [2023-12-02 18:28:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:28:49,469 INFO L495 AbstractCegarLoop]: Abstraction has 76447 states and 104355 transitions. [2023-12-02 18:28:49,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 11.91891891891892) internal successors, (441), 37 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:28:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 76447 states and 104355 transitions. [2023-12-02 18:28:49,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-02 18:28:49,471 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:28:49,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:28:49,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2023-12-02 18:28:49,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2023-12-02 18:28:49,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-12-02 18:28:50,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:28:50,072 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:28:50,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:28:50,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1614434060, now seen corresponding path program 1 times [2023-12-02 18:28:50,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:28:50,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969482083] [2023-12-02 18:28:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:50,073 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 18:28:50,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:28:50,074 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:28:50,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2023-12-02 18:28:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:50,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:28:50,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:50,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:51,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:28:51,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969482083] [2023-12-02 18:28:51,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969482083] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:51,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [341733143] [2023-12-02 18:28:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:51,116 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:28:51,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:28:51,117 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:28:51,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2023-12-02 18:28:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:51,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:28:51,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:52,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:52,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [341733143] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:52,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858464787] [2023-12-02 18:28:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:28:52,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:28:52,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:28:52,481 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:28:52,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 18:28:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:28:52,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:28:52,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:28:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:53,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:28:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:28:53,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858464787] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:28:53,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:28:53,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 18:28:53,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166306078] [2023-12-02 18:28:53,949 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:28:53,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 18:28:53,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:28:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 18:28:53,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 18:28:53,951 INFO L87 Difference]: Start difference. First operand 76447 states and 104355 transitions. Second operand has 37 states, 37 states have (on average 13.243243243243244) internal successors, (490), 37 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:29:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:29:13,099 INFO L93 Difference]: Finished difference Result 563532 states and 772541 transitions. [2023-12-02 18:29:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-12-02 18:29:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 13.243243243243244) internal successors, (490), 37 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-12-02 18:29:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:29:13,561 INFO L225 Difference]: With dead ends: 563532 [2023-12-02 18:29:13,561 INFO L226 Difference]: Without dead ends: 487252 [2023-12-02 18:29:13,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8509 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3623, Invalid=20557, Unknown=0, NotChecked=0, Total=24180 [2023-12-02 18:29:13,630 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 8812 mSDsluCounter, 2736 mSDsCounter, 0 mSdLazyCounter, 2822 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8812 SdHoareTripleChecker+Valid, 2903 SdHoareTripleChecker+Invalid, 2940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:29:13,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8812 Valid, 2903 Invalid, 2940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2822 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-12-02 18:29:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487252 states. [2023-12-02 18:29:23,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487252 to 236861. [2023-12-02 18:29:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236861 states, 236860 states have (on average 1.358165160854513) internal successors, (321695), 236860 states have internal predecessors, (321695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:29:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236861 states to 236861 states and 321695 transitions. [2023-12-02 18:29:24,069 INFO L78 Accepts]: Start accepts. Automaton has 236861 states and 321695 transitions. Word has length 111 [2023-12-02 18:29:24,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:29:24,069 INFO L495 AbstractCegarLoop]: Abstraction has 236861 states and 321695 transitions. [2023-12-02 18:29:24,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 13.243243243243244) internal successors, (490), 37 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:29:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 236861 states and 321695 transitions. [2023-12-02 18:29:24,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 18:29:24,073 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:29:24,074 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:29:24,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-12-02 18:29:24,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2023-12-02 18:29:24,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2023-12-02 18:29:24,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:29:24,675 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:29:24,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:29:24,675 INFO L85 PathProgramCache]: Analyzing trace with hash 399083170, now seen corresponding path program 1 times [2023-12-02 18:29:24,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:29:24,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011297171] [2023-12-02 18:29:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:29:24,675 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 18:29:24,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:29:24,676 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:29:24,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2023-12-02 18:29:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:29:24,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:29:24,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:29:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:29:24,775 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:29:24,775 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:29:24,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011297171] [2023-12-02 18:29:24,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011297171] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:29:24,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:29:24,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:29:24,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392822804] [2023-12-02 18:29:24,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:29:24,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:29:24,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:29:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:29:24,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:29:24,777 INFO L87 Difference]: Start difference. First operand 236861 states and 321695 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:29:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:29:36,789 INFO L93 Difference]: Finished difference Result 680348 states and 919819 transitions. [2023-12-02 18:29:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:29:36,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2023-12-02 18:29:36,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:29:37,286 INFO L225 Difference]: With dead ends: 680348 [2023-12-02 18:29:37,286 INFO L226 Difference]: Without dead ends: 443850 [2023-12-02 18:29:37,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 110 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 18:29:37,386 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 78 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:29:37,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 310 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:29:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443850 states. [2023-12-02 18:29:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443850 to 443848. [2023-12-02 18:29:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443848 states, 443847 states have (on average 1.335588614995708) internal successors, (592797), 443847 states have internal predecessors, (592797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:29:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443848 states to 443848 states and 592797 transitions. [2023-12-02 18:29:53,315 INFO L78 Accepts]: Start accepts. Automaton has 443848 states and 592797 transitions. Word has length 112 [2023-12-02 18:29:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:29:53,315 INFO L495 AbstractCegarLoop]: Abstraction has 443848 states and 592797 transitions. [2023-12-02 18:29:53,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:29:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 443848 states and 592797 transitions. [2023-12-02 18:29:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 18:29:53,324 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:29:53,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:29:53,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2023-12-02 18:29:53,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:29:53,524 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:29:53,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:29:53,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1804118460, now seen corresponding path program 1 times [2023-12-02 18:29:53,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:29:53,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264640661] [2023-12-02 18:29:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:29:53,525 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 18:29:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:29:53,526 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 18:29:53,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2023-12-02 18:29:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:29:53,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:29:53,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:29:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:29:54,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:29:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:29:54,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:29:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264640661] [2023-12-02 18:29:54,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264640661] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:29:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1481621418] [2023-12-02 18:29:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:29:54,976 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:29:54,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:29:54,977 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:29:54,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2023-12-02 18:29:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:29:55,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:29:55,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:29:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:29:55,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:29:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:29:56,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1481621418] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:29:56,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366077404] [2023-12-02 18:29:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:29:56,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:29:56,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:29:56,473 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:29:56,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_230394fb-076a-4349-a276-2bb419e3a6c7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 18:29:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:29:56,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 18:29:56,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:29:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:29:57,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:29:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:29:57,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366077404] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:29:57,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:29:57,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 18:29:57,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411937233] [2023-12-02 18:29:57,925 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:29:57,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 18:29:57,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:29:57,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 18:29:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 18:29:57,927 INFO L87 Difference]: Start difference. First operand 443848 states and 592797 transitions. Second operand has 37 states, 37 states have (on average 13.621621621621621) internal successors, (504), 37 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)