./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --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 64bit --witnessprinter.graph.data.programhash bda3098802797ffc08e15000ad078a436cf195bb22a40ea321a7ea1bbc073e29 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 16:06:04,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:06:04,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:06:04,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:06:04,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:06:04,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:06:04,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:06:04,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:06:04,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:06:04,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:06:04,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:06:04,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:06:04,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:06:04,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:06:04,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:06:04,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:06:04,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:06:04,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:06:04,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:06:04,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:06:04,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:06:04,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:06:04,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:06:04,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:06:04,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:06:04,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:06:04,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:06:04,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:06:04,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:06:04,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:06:04,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:06:04,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:06:04,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:06:04,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:06:04,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:06:04,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:06:04,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:06:04,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:06:04,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:06:04,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:06:04,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:06:04,814 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 16:06:04,842 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:06:04,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:06:04,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:06:04,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:06:04,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:06:04,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:06:04,845 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:06:04,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:06:04,846 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:06:04,846 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:06:04,847 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:06:04,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:06:04,848 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:06:04,848 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:06:04,849 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:06:04,849 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:06:04,849 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:06:04,850 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:06:04,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:06:04,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:06:04,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:06:04,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:06:04,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:06:04,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:06:04,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:06:04,854 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:06:04,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:06:04,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:06:04,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:06:04,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:06:04,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:06:04,856 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:06:04,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:06:04,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:06:04,858 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:06:04,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:06:04,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:06:04,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:06:04,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bda3098802797ffc08e15000ad078a436cf195bb22a40ea321a7ea1bbc073e29 [2022-11-23 16:06:05,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:06:05,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:06:05,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:06:05,241 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:06:05,242 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:06:05,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i [2022-11-23 16:06:08,555 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:06:09,362 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:06:09,363 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i [2022-11-23 16:06:09,402 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/data/a6156ca36/21ac9132c20b4779aeb26783a125db76/FLAG333da02a2 [2022-11-23 16:06:09,418 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/data/a6156ca36/21ac9132c20b4779aeb26783a125db76 [2022-11-23 16:06:09,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:06:09,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:06:09,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:06:09,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:06:09,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:06:09,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:06:09" (1/1) ... [2022-11-23 16:06:09,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e42021b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:09, skipping insertion in model container [2022-11-23 16:06:09,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:06:09" (1/1) ... [2022-11-23 16:06:09,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:06:09,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:06:12,719 WARN L237 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_8f6986be-56d6-404d-9301-56846b1f42c1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i[353122,353135] [2022-11-23 16:06:12,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:06:12,836 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:06:13,463 WARN L237 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_8f6986be-56d6-404d-9301-56846b1f42c1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i[353122,353135] [2022-11-23 16:06:13,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:06:13,579 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:06:13,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13 WrapperNode [2022-11-23 16:06:13,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:06:13,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:06:13,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:06:13,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:06:13,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (1/1) ... [2022-11-23 16:06:13,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (1/1) ... [2022-11-23 16:06:14,054 INFO L138 Inliner]: procedures = 247, calls = 4082, calls flagged for inlining = 104, calls inlined = 99, statements flattened = 9602 [2022-11-23 16:06:14,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:06:14,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:06:14,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:06:14,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:06:14,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (1/1) ... [2022-11-23 16:06:14,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (1/1) ... [2022-11-23 16:06:14,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (1/1) ... [2022-11-23 16:06:14,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (1/1) ... [2022-11-23 16:06:14,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (1/1) ... [2022-11-23 16:06:14,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (1/1) ... [2022-11-23 16:06:14,553 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (1/1) ... [2022-11-23 16:06:14,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (1/1) ... [2022-11-23 16:06:14,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:06:14,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:06:14,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:06:14,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:06:14,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (1/1) ... [2022-11-23 16:06:14,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:06:14,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:06:14,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:06:14,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:06:14,747 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2022-11-23 16:06:14,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2022-11-23 16:06:14,748 INFO L130 BoogieDeclarations]: Found specification of procedure osst_log_options [2022-11-23 16:06:14,748 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_log_options [2022-11-23 16:06:14,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-23 16:06:14,748 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-23 16:06:14,748 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-23 16:06:14,749 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-23 16:06:14,749 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-11-23 16:06:14,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 16:06:14,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 16:06:14,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 16:06:14,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 16:06:14,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 16:06:14,750 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 16:06:14,750 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_behind_check [2022-11-23 16:06:14,750 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_behind_check [2022-11-23 16:06:14,750 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-23 16:06:14,750 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-23 16:06:14,750 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2022-11-23 16:06:14,750 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2022-11-23 16:06:14,750 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-23 16:06:14,751 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-23 16:06:14,751 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock [2022-11-23 16:06:14,751 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock [2022-11-23 16:06:14,752 INFO L130 BoogieDeclarations]: Found specification of procedure osst_release_request [2022-11-23 16:06:14,752 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_release_request [2022-11-23 16:06:14,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 16:06:14,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 16:06:14,753 INFO L130 BoogieDeclarations]: Found specification of procedure osst_set_frame_position [2022-11-23 16:06:14,753 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_set_frame_position [2022-11-23 16:06:14,754 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_header [2022-11-23 16:06:14,754 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_header [2022-11-23 16:06:14,754 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2022-11-23 16:06:14,754 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2022-11-23 16:06:14,754 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 16:06:14,754 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 16:06:14,755 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 16:06:14,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 16:06:14,755 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-23 16:06:14,755 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-23 16:06:14,755 INFO L130 BoogieDeclarations]: Found specification of procedure osst_read_frame [2022-11-23 16:06:14,755 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_read_frame [2022-11-23 16:06:14,755 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2022-11-23 16:06:14,756 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2022-11-23 16:06:14,756 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_device_put [2022-11-23 16:06:14,756 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_device_put [2022-11-23 16:06:14,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 16:06:14,756 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 16:06:14,757 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 16:06:14,757 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 16:06:14,757 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_write_buffer [2022-11-23 16:06:14,757 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_write_buffer [2022-11-23 16:06:14,758 INFO L130 BoogieDeclarations]: Found specification of procedure osst_initiate_read [2022-11-23 16:06:14,758 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_initiate_read [2022-11-23 16:06:14,758 INFO L130 BoogieDeclarations]: Found specification of procedure osst_seek_logical_blk [2022-11-23 16:06:14,758 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_seek_logical_blk [2022-11-23 16:06:14,758 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_trailer [2022-11-23 16:06:14,758 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_trailer [2022-11-23 16:06:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_drive_buffer [2022-11-23 16:06:14,759 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_drive_buffer [2022-11-23 16:06:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 16:06:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-23 16:06:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure osst_int_ioctl [2022-11-23 16:06:14,759 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_int_ioctl [2022-11-23 16:06:14,759 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2022-11-23 16:06:14,760 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2022-11-23 16:06:14,760 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2022-11-23 16:06:14,760 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2022-11-23 16:06:14,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 16:06:14,760 INFO L130 BoogieDeclarations]: Found specification of procedure osst_copy_to_buffer [2022-11-23 16:06:14,761 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_copy_to_buffer [2022-11-23 16:06:14,761 INFO L130 BoogieDeclarations]: Found specification of procedure __osst_analyze_headers [2022-11-23 16:06:14,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __osst_analyze_headers [2022-11-23 16:06:14,762 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 16:06:14,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 16:06:14,762 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-11-23 16:06:14,763 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-11-23 16:06:14,763 INFO L130 BoogieDeclarations]: Found specification of procedure osst_get_logical_frame [2022-11-23 16:06:14,764 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_get_logical_frame [2022-11-23 16:06:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2022-11-23 16:06:14,764 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2022-11-23 16:06:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 16:06:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure osst_position_tape_and_confirm [2022-11-23 16:06:14,764 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_position_tape_and_confirm [2022-11-23 16:06:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 16:06:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-23 16:06:14,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-23 16:06:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-23 16:06:14,765 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-23 16:06:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 16:06:14,766 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 16:06:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure osst_verify_frame [2022-11-23 16:06:14,767 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_verify_frame [2022-11-23 16:06:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-11-23 16:06:14,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-11-23 16:06:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure osst_wait_ready [2022-11-23 16:06:14,767 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_wait_ready [2022-11-23 16:06:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-23 16:06:14,768 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-23 16:06:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure osst_reset_header [2022-11-23 16:06:14,768 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_reset_header [2022-11-23 16:06:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 16:06:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure osst_do_scsi [2022-11-23 16:06:14,768 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_do_scsi [2022-11-23 16:06:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-23 16:06:14,769 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-23 16:06:14,769 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2022-11-23 16:06:14,769 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2022-11-23 16:06:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 16:06:14,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 16:06:14,773 INFO L130 BoogieDeclarations]: Found specification of procedure osst_chk_result [2022-11-23 16:06:14,774 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_chk_result [2022-11-23 16:06:14,774 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_add [2022-11-23 16:06:14,774 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_add [2022-11-23 16:06:14,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 16:06:14,777 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 16:06:14,778 INFO L130 BoogieDeclarations]: Found specification of procedure osst_space_over_filemarks_backward [2022-11-23 16:06:14,778 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_space_over_filemarks_backward [2022-11-23 16:06:14,778 INFO L130 BoogieDeclarations]: Found specification of procedure osst_read_back_buffer_and_rewrite [2022-11-23 16:06:14,782 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_read_back_buffer_and_rewrite [2022-11-23 16:06:14,782 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2022-11-23 16:06:14,782 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2022-11-23 16:06:14,782 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_cleanup [2022-11-23 16:06:14,782 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_cleanup [2022-11-23 16:06:14,783 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 16:06:14,783 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 16:06:14,783 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_buffer [2022-11-23 16:06:14,783 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_buffer [2022-11-23 16:06:14,783 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2022-11-23 16:06:14,783 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2022-11-23 16:06:14,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 16:06:14,783 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-23 16:06:14,784 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-23 16:06:14,784 INFO L130 BoogieDeclarations]: Found specification of procedure osst_reposition_and_retry [2022-11-23 16:06:14,784 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_reposition_and_retry [2022-11-23 16:06:14,784 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_filemark [2022-11-23 16:06:14,784 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_filemark [2022-11-23 16:06:14,784 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_destroy [2022-11-23 16:06:14,784 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_destroy [2022-11-23 16:06:14,784 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 16:06:14,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 16:06:14,785 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 16:06:14,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 16:06:14,785 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2022-11-23 16:06:14,785 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2022-11-23 16:06:14,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 16:06:14,787 INFO L130 BoogieDeclarations]: Found specification of procedure vmalloc [2022-11-23 16:06:14,787 INFO L138 BoogieDeclarations]: Found implementation of procedure vmalloc [2022-11-23 16:06:14,787 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-23 16:06:14,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-23 16:06:14,787 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock [2022-11-23 16:06:14,787 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock [2022-11-23 16:06:14,788 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-23 16:06:14,788 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-23 16:06:14,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:06:14,788 INFO L130 BoogieDeclarations]: Found specification of procedure __osst_write_header [2022-11-23 16:06:14,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __osst_write_header [2022-11-23 16:06:14,788 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write [2022-11-23 16:06:14,788 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write [2022-11-23 16:06:14,788 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_frame [2022-11-23 16:06:14,789 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_frame [2022-11-23 16:06:14,789 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2022-11-23 16:06:14,789 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2022-11-23 16:06:14,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 16:06:14,789 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 16:06:14,790 INFO L130 BoogieDeclarations]: Found specification of procedure osst_get_frame_position [2022-11-23 16:06:14,790 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_get_frame_position [2022-11-23 16:06:14,790 INFO L130 BoogieDeclarations]: Found specification of procedure os_scsi_tape_flush [2022-11-23 16:06:14,790 INFO L138 BoogieDeclarations]: Found implementation of procedure os_scsi_tape_flush [2022-11-23 16:06:14,790 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_buffer [2022-11-23 16:06:14,790 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_buffer [2022-11-23 16:06:14,790 INFO L130 BoogieDeclarations]: Found specification of procedure osst_copy_from_buffer [2022-11-23 16:06:14,791 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_copy_from_buffer [2022-11-23 16:06:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-11-23 16:06:14,791 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-11-23 16:06:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2022-11-23 16:06:14,791 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2022-11-23 16:06:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2022-11-23 16:06:14,791 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2022-11-23 16:06:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure osst_init_aux [2022-11-23 16:06:14,792 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_init_aux [2022-11-23 16:06:14,792 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_error_recovery [2022-11-23 16:06:14,792 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_error_recovery [2022-11-23 16:06:14,792 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_eod [2022-11-23 16:06:14,792 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_eod [2022-11-23 16:06:14,792 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2022-11-23 16:06:14,792 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2022-11-23 16:06:14,793 INFO L130 BoogieDeclarations]: Found specification of procedure osst_space_over_filemarks_forward_slow [2022-11-23 16:06:14,793 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_space_over_filemarks_forward_slow [2022-11-23 16:06:14,793 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2022-11-23 16:06:14,793 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2022-11-23 16:06:14,793 INFO L130 BoogieDeclarations]: Found specification of procedure sg_set_page [2022-11-23 16:06:14,793 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_set_page [2022-11-23 16:06:14,793 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_6 [2022-11-23 16:06:14,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_6 [2022-11-23 16:06:14,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:06:14,794 INFO L130 BoogieDeclarations]: Found specification of procedure osst_recover_wait_frame [2022-11-23 16:06:14,794 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_recover_wait_frame [2022-11-23 16:06:14,794 INFO L130 BoogieDeclarations]: Found specification of procedure osst_wait_frame [2022-11-23 16:06:14,794 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_wait_frame [2022-11-23 16:06:14,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:06:14,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:06:14,795 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-23 16:06:14,795 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-23 16:06:16,166 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:06:16,170 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:06:16,291 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 16:06:37,697 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:06:44,746 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:06:44,746 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 16:06:44,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:06:44 BoogieIcfgContainer [2022-11-23 16:06:44,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:06:44,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:06:44,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:06:44,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:06:44,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:06:09" (1/3) ... [2022-11-23 16:06:44,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65039ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:06:44, skipping insertion in model container [2022-11-23 16:06:44,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:13" (2/3) ... [2022-11-23 16:06:44,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65039ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:06:44, skipping insertion in model container [2022-11-23 16:06:44,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:06:44" (3/3) ... [2022-11-23 16:06:44,774 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i [2022-11-23 16:06:44,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:06:44,800 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:06:44,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:06:44,940 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=LoopsAndPotentialCycles, 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;@34ba4a05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:06:44,940 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 16:06:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 2235 states, 1525 states have (on average 1.4131147540983606) internal successors, (2155), 1555 states have internal predecessors, (2155), 616 states have call successors, (616), 93 states have call predecessors, (616), 92 states have return successors, (605), 602 states have call predecessors, (605), 605 states have call successors, (605) [2022-11-23 16:06:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-11-23 16:06:45,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:45,007 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:45,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:06:45,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:45,013 INFO L85 PathProgramCache]: Analyzing trace with hash -926489578, now seen corresponding path program 1 times [2022-11-23 16:06:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:45,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508593803] [2022-11-23 16:06:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:45,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3196 trivial. 0 not checked. [2022-11-23 16:06:47,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:47,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508593803] [2022-11-23 16:06:47,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508593803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:47,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:47,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:06:47,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649054078] [2022-11-23 16:06:47,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:47,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:47,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:47,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:47,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:47,142 INFO L87 Difference]: Start difference. First operand has 2235 states, 1525 states have (on average 1.4131147540983606) internal successors, (2155), 1555 states have internal predecessors, (2155), 616 states have call successors, (616), 93 states have call predecessors, (616), 92 states have return successors, (605), 602 states have call predecessors, (605), 605 states have call successors, (605) Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2022-11-23 16:06:49,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:52,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:06:54,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:57,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:00,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:07:03,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:06,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:07:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:08,281 INFO L93 Difference]: Finished difference Result 6458 states and 9860 transitions. [2022-11-23 16:07:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:07:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 401 [2022-11-23 16:07:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:08,345 INFO L225 Difference]: With dead ends: 6458 [2022-11-23 16:07:08,345 INFO L226 Difference]: Without dead ends: 4258 [2022-11-23 16:07:08,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:08,374 INFO L413 NwaCegarLoop]: 3570 mSDtfsCounter, 3127 mSDsluCounter, 2973 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3127 SdHoareTripleChecker+Valid, 6543 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:08,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3127 Valid, 6543 Invalid, 734 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 726 Invalid, 5 Unknown, 0 Unchecked, 20.6s Time] [2022-11-23 16:07:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2022-11-23 16:07:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 4258. [2022-11-23 16:07:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4258 states, 2940 states have (on average 1.4068027210884353) internal successors, (4136), 2967 states have internal predecessors, (4136), 1138 states have call successors, (1138), 180 states have call predecessors, (1138), 179 states have return successors, (1137), 1133 states have call predecessors, (1137), 1137 states have call successors, (1137) [2022-11-23 16:07:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4258 states to 4258 states and 6411 transitions. [2022-11-23 16:07:08,818 INFO L78 Accepts]: Start accepts. Automaton has 4258 states and 6411 transitions. Word has length 401 [2022-11-23 16:07:08,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:08,823 INFO L495 AbstractCegarLoop]: Abstraction has 4258 states and 6411 transitions. [2022-11-23 16:07:08,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2022-11-23 16:07:08,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4258 states and 6411 transitions. [2022-11-23 16:07:08,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-11-23 16:07:08,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:08,846 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:08,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:07:08,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash -318101851, now seen corresponding path program 1 times [2022-11-23 16:07:08,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:08,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071309842] [2022-11-23 16:07:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:08,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3196 trivial. 0 not checked. [2022-11-23 16:07:10,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:10,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071309842] [2022-11-23 16:07:10,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071309842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:10,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:10,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:07:10,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330227004] [2022-11-23 16:07:10,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:10,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:07:10,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:10,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:07:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:07:10,184 INFO L87 Difference]: Start difference. First operand 4258 states and 6411 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2022-11-23 16:07:11,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:16,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:07:18,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:23,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:25,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:27,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:31,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:07:37,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:44,884 INFO L93 Difference]: Finished difference Result 12058 states and 18581 transitions. [2022-11-23 16:07:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:07:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 410 [2022-11-23 16:07:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:44,957 INFO L225 Difference]: With dead ends: 12058 [2022-11-23 16:07:44,958 INFO L226 Difference]: Without dead ends: 7871 [2022-11-23 16:07:44,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:07:44,994 INFO L413 NwaCegarLoop]: 4420 mSDtfsCounter, 2497 mSDsluCounter, 7850 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 327 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2822 SdHoareTripleChecker+Valid, 12270 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:44,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2822 Valid, 12270 Invalid, 1748 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [327 Valid, 1415 Invalid, 6 Unknown, 0 Unchecked, 34.2s Time] [2022-11-23 16:07:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2022-11-23 16:07:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 4260. [2022-11-23 16:07:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4260 states, 2942 states have (on average 1.406526172671652) internal successors, (4138), 2969 states have internal predecessors, (4138), 1138 states have call successors, (1138), 180 states have call predecessors, (1138), 179 states have return successors, (1137), 1133 states have call predecessors, (1137), 1137 states have call successors, (1137) [2022-11-23 16:07:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4260 states to 4260 states and 6413 transitions. [2022-11-23 16:07:45,351 INFO L78 Accepts]: Start accepts. Automaton has 4260 states and 6413 transitions. Word has length 410 [2022-11-23 16:07:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:45,353 INFO L495 AbstractCegarLoop]: Abstraction has 4260 states and 6413 transitions. [2022-11-23 16:07:45,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2022-11-23 16:07:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4260 states and 6413 transitions. [2022-11-23 16:07:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-11-23 16:07:45,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:45,366 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:45,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:07:45,367 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:45,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2057708074, now seen corresponding path program 1 times [2022-11-23 16:07:45,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:45,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675834860] [2022-11-23 16:07:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:45,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3196 trivial. 0 not checked. [2022-11-23 16:07:46,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:46,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675834860] [2022-11-23 16:07:46,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675834860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:46,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:07:46,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:07:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012367777] [2022-11-23 16:07:46,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:46,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:07:46,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:46,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:07:46,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:07:46,168 INFO L87 Difference]: Start difference. First operand 4260 states and 6413 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-23 16:07:49,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:07:51,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:55,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:58,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:08:03,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:03,561 INFO L93 Difference]: Finished difference Result 8366 states and 12593 transitions. [2022-11-23 16:08:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:08:03,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 414 [2022-11-23 16:08:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:03,661 INFO L225 Difference]: With dead ends: 8366 [2022-11-23 16:08:03,661 INFO L226 Difference]: Without dead ends: 8335 [2022-11-23 16:08:03,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:08:03,674 INFO L413 NwaCegarLoop]: 3573 mSDtfsCounter, 3134 mSDsluCounter, 2875 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3134 SdHoareTripleChecker+Valid, 6448 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:03,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3134 Valid, 6448 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 721 Invalid, 4 Unknown, 0 Unchecked, 16.9s Time] [2022-11-23 16:08:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2022-11-23 16:08:04,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 8335. [2022-11-23 16:08:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8335 states, 5776 states have (on average 1.4089335180055402) internal successors, (8138), 5825 states have internal predecessors, (8138), 2207 states have call successors, (2207), 352 states have call predecessors, (2207), 351 states have return successors, (2206), 2200 states have call predecessors, (2206), 2206 states have call successors, (2206) [2022-11-23 16:08:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8335 states to 8335 states and 12551 transitions. [2022-11-23 16:08:04,436 INFO L78 Accepts]: Start accepts. Automaton has 8335 states and 12551 transitions. Word has length 414 [2022-11-23 16:08:04,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:04,440 INFO L495 AbstractCegarLoop]: Abstraction has 8335 states and 12551 transitions. [2022-11-23 16:08:04,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-23 16:08:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 8335 states and 12551 transitions. [2022-11-23 16:08:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-11-23 16:08:04,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:04,476 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:04,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:08:04,477 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:04,479 INFO L85 PathProgramCache]: Analyzing trace with hash 364183726, now seen corresponding path program 1 times [2022-11-23 16:08:04,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:04,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255841746] [2022-11-23 16:08:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:04,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:04,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:08:04,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509945022] [2022-11-23 16:08:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:04,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:08:04,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:08:04,809 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:08:04,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:08:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:07,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 5497 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:08:07,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:08:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3198 trivial. 0 not checked. [2022-11-23 16:08:07,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:08:07,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:07,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255841746] [2022-11-23 16:08:07,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:08:07,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509945022] [2022-11-23 16:08:07,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509945022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:08:07,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:08:07,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:08:07,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065300602] [2022-11-23 16:08:07,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:08:07,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:08:07,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:08:07,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:08:07,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:08:07,893 INFO L87 Difference]: Start difference. First operand 8335 states and 12551 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2022-11-23 16:08:09,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:11,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:15,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:08:17,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:18,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:20,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:24,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:08:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:26,347 INFO L93 Difference]: Finished difference Result 17596 states and 26449 transitions. [2022-11-23 16:08:26,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:08:26,348 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), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 463 [2022-11-23 16:08:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:26,433 INFO L225 Difference]: With dead ends: 17596 [2022-11-23 16:08:26,433 INFO L226 Difference]: Without dead ends: 9332 [2022-11-23 16:08:26,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:08:26,499 INFO L413 NwaCegarLoop]: 3019 mSDtfsCounter, 495 mSDsluCounter, 2823 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 12 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 5842 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:26,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 5842 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 746 Invalid, 3 Unknown, 0 Unchecked, 18.1s Time] [2022-11-23 16:08:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2022-11-23 16:08:27,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 9318. [2022-11-23 16:08:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9318 states, 6528 states have (on average 1.4134497549019607) internal successors, (9227), 6579 states have internal predecessors, (9227), 2365 states have call successors, (2365), 425 states have call predecessors, (2365), 424 states have return successors, (2364), 2358 states have call predecessors, (2364), 2364 states have call successors, (2364) [2022-11-23 16:08:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9318 states to 9318 states and 13956 transitions. [2022-11-23 16:08:27,185 INFO L78 Accepts]: Start accepts. Automaton has 9318 states and 13956 transitions. Word has length 463 [2022-11-23 16:08:27,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:27,186 INFO L495 AbstractCegarLoop]: Abstraction has 9318 states and 13956 transitions. [2022-11-23 16:08:27,187 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), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2022-11-23 16:08:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 9318 states and 13956 transitions. [2022-11-23 16:08:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-11-23 16:08:27,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:27,208 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:27,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:08:27,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:08:27,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:27,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:27,422 INFO L85 PathProgramCache]: Analyzing trace with hash 326476458, now seen corresponding path program 1 times [2022-11-23 16:08:27,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:27,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583254651] [2022-11-23 16:08:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:27,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3221 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3216 trivial. 0 not checked. [2022-11-23 16:08:28,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583254651] [2022-11-23 16:08:28,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583254651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:08:28,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:08:28,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:08:28,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395985982] [2022-11-23 16:08:28,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:08:28,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:08:28,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:08:28,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:08:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:08:28,262 INFO L87 Difference]: Start difference. First operand 9318 states and 13956 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2022-11-23 16:08:30,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:34,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:37,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:08:41,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:44,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:08:47,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:47,821 INFO L93 Difference]: Finished difference Result 26956 states and 40432 transitions. [2022-11-23 16:08:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:08:47,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 494 [2022-11-23 16:08:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:47,957 INFO L225 Difference]: With dead ends: 26956 [2022-11-23 16:08:47,958 INFO L226 Difference]: Without dead ends: 17712 [2022-11-23 16:08:48,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:08:48,026 INFO L413 NwaCegarLoop]: 3796 mSDtfsCounter, 3007 mSDsluCounter, 2968 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3007 SdHoareTripleChecker+Valid, 6764 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:48,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3007 Valid, 6764 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 762 Invalid, 4 Unknown, 0 Unchecked, 18.9s Time] [2022-11-23 16:08:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17712 states. [2022-11-23 16:08:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17712 to 17706. [2022-11-23 16:08:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17706 states, 12458 states have (on average 1.4158773478889066) internal successors, (17639), 12550 states have internal predecessors, (17639), 4466 states have call successors, (4466), 782 states have call predecessors, (4466), 781 states have return successors, (4465), 4453 states have call predecessors, (4465), 4465 states have call successors, (4465) [2022-11-23 16:08:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17706 states to 17706 states and 26570 transitions. [2022-11-23 16:08:49,322 INFO L78 Accepts]: Start accepts. Automaton has 17706 states and 26570 transitions. Word has length 494 [2022-11-23 16:08:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:49,323 INFO L495 AbstractCegarLoop]: Abstraction has 17706 states and 26570 transitions. [2022-11-23 16:08:49,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2022-11-23 16:08:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 17706 states and 26570 transitions. [2022-11-23 16:08:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2022-11-23 16:08:49,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:49,385 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:49,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:08:49,386 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:49,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:49,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1277874669, now seen corresponding path program 1 times [2022-11-23 16:08:49,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:49,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437985390] [2022-11-23 16:08:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:49,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:49,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:08:49,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603084773] [2022-11-23 16:08:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:49,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:08:49,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:08:49,718 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:08:49,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:08:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:52,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 5941 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:08:52,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:08:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3734 backedges. 500 proven. 0 refuted. 0 times theorem prover too weak. 3234 trivial. 0 not checked. [2022-11-23 16:08:53,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:08:53,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:53,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437985390] [2022-11-23 16:08:53,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:08:53,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603084773] [2022-11-23 16:08:53,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603084773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:08:53,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:08:53,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:08:53,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099889469] [2022-11-23 16:08:53,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:08:53,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:08:53,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:08:53,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:08:53,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:08:53,562 INFO L87 Difference]: Start difference. First operand 17706 states and 26570 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (56), 3 states have call predecessors, (56), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2022-11-23 16:08:57,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:00,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:09:02,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:04,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:08,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:09:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:12,728 INFO L93 Difference]: Finished difference Result 30690 states and 46099 transitions. [2022-11-23 16:09:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:09:12,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (56), 3 states have call predecessors, (56), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) Word has length 524 [2022-11-23 16:09:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:12,884 INFO L225 Difference]: With dead ends: 30690 [2022-11-23 16:09:12,884 INFO L226 Difference]: Without dead ends: 30586 [2022-11-23 16:09:12,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:12,902 INFO L413 NwaCegarLoop]: 3718 mSDtfsCounter, 3080 mSDsluCounter, 2839 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3080 SdHoareTripleChecker+Valid, 6557 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:12,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3080 Valid, 6557 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 759 Invalid, 4 Unknown, 0 Unchecked, 18.3s Time] [2022-11-23 16:09:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30586 states. [2022-11-23 16:09:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30586 to 30367. [2022-11-23 16:09:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30367 states, 21360 states have (on average 1.4165730337078652) internal successors, (30258), 21512 states have internal predecessors, (30258), 7688 states have call successors, (7688), 1319 states have call predecessors, (7688), 1318 states have return successors, (7687), 7669 states have call predecessors, (7687), 7687 states have call successors, (7687) [2022-11-23 16:09:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30367 states to 30367 states and 45633 transitions. [2022-11-23 16:09:14,890 INFO L78 Accepts]: Start accepts. Automaton has 30367 states and 45633 transitions. Word has length 524 [2022-11-23 16:09:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:14,892 INFO L495 AbstractCegarLoop]: Abstraction has 30367 states and 45633 transitions. [2022-11-23 16:09:14,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (56), 3 states have call predecessors, (56), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2022-11-23 16:09:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30367 states and 45633 transitions. [2022-11-23 16:09:14,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2022-11-23 16:09:14,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:14,974 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:15,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:15,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:15,196 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:15,196 INFO L85 PathProgramCache]: Analyzing trace with hash 686258899, now seen corresponding path program 1 times [2022-11-23 16:09:15,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:15,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429753557] [2022-11-23 16:09:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:15,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3508 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 3491 trivial. 0 not checked. [2022-11-23 16:09:16,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:16,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429753557] [2022-11-23 16:09:16,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429753557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:16,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:16,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:09:16,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256132077] [2022-11-23 16:09:16,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:16,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:09:16,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:16,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:09:16,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:09:16,653 INFO L87 Difference]: Start difference. First operand 30367 states and 45633 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-23 16:09:20,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:21,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:22,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:26,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:31,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:09:36,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:38,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:40,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:42,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:44,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:45,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:47,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:51,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:09:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:58,980 INFO L93 Difference]: Finished difference Result 88137 states and 135556 transitions. [2022-11-23 16:09:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:09:58,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 544 [2022-11-23 16:09:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:59,366 INFO L225 Difference]: With dead ends: 88137 [2022-11-23 16:09:59,366 INFO L226 Difference]: Without dead ends: 57852 [2022-11-23 16:09:59,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:09:59,532 INFO L413 NwaCegarLoop]: 4542 mSDtfsCounter, 2078 mSDsluCounter, 7718 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 315 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2393 SdHoareTripleChecker+Valid, 12260 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:59,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2393 Valid, 12260 Invalid, 1722 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [315 Valid, 1399 Invalid, 8 Unknown, 0 Unchecked, 39.9s Time] [2022-11-23 16:09:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57852 states. [2022-11-23 16:10:02,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57852 to 30395. [2022-11-23 16:10:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30395 states, 21388 states have (on average 1.4160276790723771) internal successors, (30286), 21540 states have internal predecessors, (30286), 7688 states have call successors, (7688), 1319 states have call predecessors, (7688), 1318 states have return successors, (7687), 7669 states have call predecessors, (7687), 7687 states have call successors, (7687) [2022-11-23 16:10:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30395 states to 30395 states and 45661 transitions. [2022-11-23 16:10:03,049 INFO L78 Accepts]: Start accepts. Automaton has 30395 states and 45661 transitions. Word has length 544 [2022-11-23 16:10:03,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:10:03,050 INFO L495 AbstractCegarLoop]: Abstraction has 30395 states and 45661 transitions. [2022-11-23 16:10:03,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-23 16:10:03,051 INFO L276 IsEmpty]: Start isEmpty. Operand 30395 states and 45661 transitions. [2022-11-23 16:10:03,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-11-23 16:10:03,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:10:03,163 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:10:03,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 16:10:03,164 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:10:03,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:10:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash 547740560, now seen corresponding path program 1 times [2022-11-23 16:10:03,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:10:03,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444350610] [2022-11-23 16:10:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:03,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:10:03,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:10:03,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121683273] [2022-11-23 16:10:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:03,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:03,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:10:03,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:10:03,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:10:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:07,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 6029 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:10:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:10:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 776 proven. 0 refuted. 0 times theorem prover too weak. 3228 trivial. 0 not checked. [2022-11-23 16:10:07,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:10:07,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:07,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444350610] [2022-11-23 16:10:07,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:10:07,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121683273] [2022-11-23 16:10:07,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121683273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:10:07,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:10:07,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:10:07,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784073003] [2022-11-23 16:10:07,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:10:07,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:10:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:10:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:10:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:10:07,340 INFO L87 Difference]: Start difference. First operand 30395 states and 45661 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2022-11-23 16:10:09,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:12,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:16,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:10:19,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:21,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:23,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:26,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:10:28,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:10:28,956 INFO L93 Difference]: Finished difference Result 78090 states and 116443 transitions. [2022-11-23 16:10:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:10:28,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) Word has length 536 [2022-11-23 16:10:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:10:29,479 INFO L225 Difference]: With dead ends: 78090 [2022-11-23 16:10:29,479 INFO L226 Difference]: Without dead ends: 47777 [2022-11-23 16:10:29,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:10:29,650 INFO L413 NwaCegarLoop]: 3322 mSDtfsCounter, 2396 mSDsluCounter, 2450 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 16 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2396 SdHoareTripleChecker+Valid, 5772 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:10:29,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2396 Valid, 5772 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 702 Invalid, 4 Unknown, 0 Unchecked, 19.7s Time] [2022-11-23 16:10:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47777 states. [2022-11-23 16:10:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47777 to 47754. [2022-11-23 16:10:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47754 states, 33407 states have (on average 1.401203340617236) internal successors, (46810), 33664 states have internal predecessors, (46810), 11997 states have call successors, (11997), 2350 states have call predecessors, (11997), 2349 states have return successors, (11996), 11964 states have call predecessors, (11996), 11996 states have call successors, (11996) [2022-11-23 16:10:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47754 states to 47754 states and 70803 transitions. [2022-11-23 16:10:32,571 INFO L78 Accepts]: Start accepts. Automaton has 47754 states and 70803 transitions. Word has length 536 [2022-11-23 16:10:32,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:10:32,572 INFO L495 AbstractCegarLoop]: Abstraction has 47754 states and 70803 transitions. [2022-11-23 16:10:32,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2022-11-23 16:10:32,572 INFO L276 IsEmpty]: Start isEmpty. Operand 47754 states and 70803 transitions. [2022-11-23 16:10:32,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-11-23 16:10:32,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:10:32,642 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:10:32,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:10:32,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:32,858 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:10:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:10:32,858 INFO L85 PathProgramCache]: Analyzing trace with hash 651514774, now seen corresponding path program 1 times [2022-11-23 16:10:32,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:10:32,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259127144] [2022-11-23 16:10:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:32,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:10:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3508 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 3491 trivial. 0 not checked. [2022-11-23 16:10:34,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:34,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259127144] [2022-11-23 16:10:34,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259127144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:10:34,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:10:34,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:10:34,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821180134] [2022-11-23 16:10:34,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:10:34,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:10:34,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:10:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:10:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:10:34,544 INFO L87 Difference]: Start difference. First operand 47754 states and 70803 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-23 16:10:36,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:40,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:44,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:10:45,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:48,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:50,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:54,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:10:57,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:11:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:01,815 INFO L93 Difference]: Finished difference Result 86224 states and 129334 transitions. [2022-11-23 16:11:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:11:01,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 547 [2022-11-23 16:11:01,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:02,157 INFO L225 Difference]: With dead ends: 86224 [2022-11-23 16:11:02,158 INFO L226 Difference]: Without dead ends: 58927 [2022-11-23 16:11:02,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:11:02,287 INFO L413 NwaCegarLoop]: 3857 mSDtfsCounter, 657 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 4 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 6990 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:02,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 6990 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 816 Invalid, 6 Unknown, 0 Unchecked, 24.6s Time] [2022-11-23 16:11:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58927 states. [2022-11-23 16:11:04,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58927 to 47756. [2022-11-23 16:11:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47756 states, 33409 states have (on average 1.4011793229369331) internal successors, (46812), 33666 states have internal predecessors, (46812), 11997 states have call successors, (11997), 2350 states have call predecessors, (11997), 2349 states have return successors, (11996), 11964 states have call predecessors, (11996), 11996 states have call successors, (11996) [2022-11-23 16:11:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47756 states to 47756 states and 70805 transitions. [2022-11-23 16:11:05,096 INFO L78 Accepts]: Start accepts. Automaton has 47756 states and 70805 transitions. Word has length 547 [2022-11-23 16:11:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:05,097 INFO L495 AbstractCegarLoop]: Abstraction has 47756 states and 70805 transitions. [2022-11-23 16:11:05,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-23 16:11:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 47756 states and 70805 transitions. [2022-11-23 16:11:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-11-23 16:11:05,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:05,171 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:05,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 16:11:05,172 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:05,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:05,173 INFO L85 PathProgramCache]: Analyzing trace with hash -46846849, now seen corresponding path program 1 times [2022-11-23 16:11:05,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:05,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389760316] [2022-11-23 16:11:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:05,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3510 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 3492 trivial. 0 not checked. [2022-11-23 16:11:07,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:07,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389760316] [2022-11-23 16:11:07,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389760316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:11:07,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484117225] [2022-11-23 16:11:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:07,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:07,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:07,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:11:07,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:11:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:10,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 6386 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:11:10,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:11:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3510 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3510 trivial. 0 not checked. [2022-11-23 16:11:12,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:11:12,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484117225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:12,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:11:12,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-23 16:11:12,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216610844] [2022-11-23 16:11:12,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:12,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:11:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:12,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:11:12,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:11:12,078 INFO L87 Difference]: Start difference. First operand 47756 states and 70805 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2022-11-23 16:11:15,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:11:18,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:11:22,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:11:26,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:11:29,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:11:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:32,874 INFO L93 Difference]: Finished difference Result 68369 states and 101367 transitions. [2022-11-23 16:11:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:11:32,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) Word has length 549 [2022-11-23 16:11:32,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:33,244 INFO L225 Difference]: With dead ends: 68369 [2022-11-23 16:11:33,244 INFO L226 Difference]: Without dead ends: 68289 [2022-11-23 16:11:33,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:11:33,283 INFO L413 NwaCegarLoop]: 3545 mSDtfsCounter, 3062 mSDsluCounter, 2875 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3062 SdHoareTripleChecker+Valid, 6420 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:33,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3062 Valid, 6420 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 712 Invalid, 4 Unknown, 0 Unchecked, 18.2s Time] [2022-11-23 16:11:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68289 states. [2022-11-23 16:11:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68289 to 68181. [2022-11-23 16:11:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68181 states, 47701 states have (on average 1.4011865579337959) internal successors, (66838), 48067 states have internal predecessors, (66838), 17125 states have call successors, (17125), 3355 states have call predecessors, (17125), 3354 states have return successors, (17124), 17079 states have call predecessors, (17124), 17124 states have call successors, (17124) [2022-11-23 16:11:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68181 states to 68181 states and 101087 transitions. [2022-11-23 16:11:36,887 INFO L78 Accepts]: Start accepts. Automaton has 68181 states and 101087 transitions. Word has length 549 [2022-11-23 16:11:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:36,888 INFO L495 AbstractCegarLoop]: Abstraction has 68181 states and 101087 transitions. [2022-11-23 16:11:36,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2022-11-23 16:11:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 68181 states and 101087 transitions. [2022-11-23 16:11:37,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-11-23 16:11:37,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:37,035 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:37,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:11:37,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:37,236 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:37,237 INFO L85 PathProgramCache]: Analyzing trace with hash 43243576, now seen corresponding path program 1 times [2022-11-23 16:11:37,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:37,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453686099] [2022-11-23 16:11:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:37,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:37,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:11:37,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203979249] [2022-11-23 16:11:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:37,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:37,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:37,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:11:37,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 16:11:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 6248 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:11:41,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:11:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4039 trivial. 0 not checked. [2022-11-23 16:11:43,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:11:43,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:43,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453686099] [2022-11-23 16:11:43,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:11:43,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203979249] [2022-11-23 16:11:43,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203979249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:11:43,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:11:43,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:11:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855276484] [2022-11-23 16:11:43,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:11:43,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:11:43,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:43,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:11:43,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:11:43,149 INFO L87 Difference]: Start difference. First operand 68181 states and 101087 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2022-11-23 16:11:46,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:11:51,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:11:54,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:11:57,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:12:00,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:12:04,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:12:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:09,008 INFO L93 Difference]: Finished difference Result 109089 states and 161751 transitions. [2022-11-23 16:12:09,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:12:09,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 575 [2022-11-23 16:12:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:09,795 INFO L225 Difference]: With dead ends: 109089 [2022-11-23 16:12:09,795 INFO L226 Difference]: Without dead ends: 109009 [2022-11-23 16:12:09,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:12:09,855 INFO L413 NwaCegarLoop]: 3616 mSDtfsCounter, 2977 mSDsluCounter, 2875 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2977 SdHoareTripleChecker+Valid, 6491 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:09,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2977 Valid, 6491 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 723 Invalid, 6 Unknown, 0 Unchecked, 22.3s Time] [2022-11-23 16:12:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109009 states. [2022-11-23 16:12:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109009 to 108901. [2022-11-23 16:12:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108901 states, 76213 states have (on average 1.4012570033983704) internal successors, (106794), 76783 states have internal predecessors, (106794), 27339 states have call successors, (27339), 5349 states have call predecessors, (27339), 5348 states have return successors, (27338), 27269 states have call predecessors, (27338), 27338 states have call successors, (27338) [2022-11-23 16:12:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108901 states to 108901 states and 161471 transitions. [2022-11-23 16:12:16,112 INFO L78 Accepts]: Start accepts. Automaton has 108901 states and 161471 transitions. Word has length 575 [2022-11-23 16:12:16,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:16,113 INFO L495 AbstractCegarLoop]: Abstraction has 108901 states and 161471 transitions. [2022-11-23 16:12:16,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2022-11-23 16:12:16,114 INFO L276 IsEmpty]: Start isEmpty. Operand 108901 states and 161471 transitions. [2022-11-23 16:12:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2022-11-23 16:12:16,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:16,310 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:16,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:16,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:16,525 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:16,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:16,526 INFO L85 PathProgramCache]: Analyzing trace with hash 213585509, now seen corresponding path program 1 times [2022-11-23 16:12:16,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:16,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626569145] [2022-11-23 16:12:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:16,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:16,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:12:16,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350049438] [2022-11-23 16:12:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:16,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:16,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:16,794 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:16,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 16:12:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:20,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 5850 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:12:20,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4064 trivial. 0 not checked. [2022-11-23 16:12:22,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:22,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:22,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626569145] [2022-11-23 16:12:22,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:12:22,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350049438] [2022-11-23 16:12:22,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350049438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:22,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:22,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:12:22,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912194918] [2022-11-23 16:12:22,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:22,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:12:22,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:22,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:12:22,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:12:22,066 INFO L87 Difference]: Start difference. First operand 108901 states and 161471 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2022-11-23 16:12:25,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:12:29,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:12:32,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:12:34,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:12:38,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:12:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:43,739 INFO L93 Difference]: Finished difference Result 136118 states and 201844 transitions. [2022-11-23 16:12:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:12:43,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 608 [2022-11-23 16:12:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:44,825 INFO L225 Difference]: With dead ends: 136118 [2022-11-23 16:12:44,825 INFO L226 Difference]: Without dead ends: 136038 [2022-11-23 16:12:44,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:12:44,917 INFO L413 NwaCegarLoop]: 3637 mSDtfsCounter, 2974 mSDsluCounter, 2875 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2974 SdHoareTripleChecker+Valid, 6512 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:44,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2974 Valid, 6512 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 722 Invalid, 5 Unknown, 0 Unchecked, 16.8s Time] [2022-11-23 16:12:45,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136038 states. [2022-11-23 16:12:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136038 to 135930. [2022-11-23 16:12:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135930 states, 95131 states have (on average 1.4012361900957626) internal successors, (133301), 95835 states have internal predecessors, (133301), 34132 states have call successors, (34132), 6667 states have call predecessors, (34132), 6666 states have return successors, (34131), 34046 states have call predecessors, (34131), 34131 states have call successors, (34131) [2022-11-23 16:12:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135930 states to 135930 states and 201564 transitions. [2022-11-23 16:12:53,085 INFO L78 Accepts]: Start accepts. Automaton has 135930 states and 201564 transitions. Word has length 608 [2022-11-23 16:12:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:53,086 INFO L495 AbstractCegarLoop]: Abstraction has 135930 states and 201564 transitions. [2022-11-23 16:12:53,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2022-11-23 16:12:53,087 INFO L276 IsEmpty]: Start isEmpty. Operand 135930 states and 201564 transitions. [2022-11-23 16:12:53,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-11-23 16:12:53,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:53,365 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:53,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:53,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 16:12:53,567 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:53,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1622312791, now seen corresponding path program 1 times [2022-11-23 16:12:53,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:53,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408402367] [2022-11-23 16:12:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:53,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:54,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:12:54,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42656755] [2022-11-23 16:12:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:54,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:54,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:54,096 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:54,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f6986be-56d6-404d-9301-56846b1f42c1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 16:12:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:58,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 7399 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 16:12:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3533 backedges. 276 proven. 0 refuted. 0 times theorem prover too weak. 3257 trivial. 0 not checked. [2022-11-23 16:12:59,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:59,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:59,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408402367] [2022-11-23 16:12:59,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:12:59,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42656755] [2022-11-23 16:12:59,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42656755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:59,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:59,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:12:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497582224] [2022-11-23 16:12:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:59,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:12:59,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:12:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:12:59,030 INFO L87 Difference]: Start difference. First operand 135930 states and 201564 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 3 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) [2022-11-23 16:13:03,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:07,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:13:11,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:13:15,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:13:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:13:20,244 INFO L93 Difference]: Finished difference Result 185955 states and 275789 transitions. [2022-11-23 16:13:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:13:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 3 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) Word has length 611 [2022-11-23 16:13:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:13:21,727 INFO L225 Difference]: With dead ends: 185955 [2022-11-23 16:13:21,727 INFO L226 Difference]: Without dead ends: 138231 [2022-11-23 16:13:22,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:13:22,020 INFO L413 NwaCegarLoop]: 3034 mSDtfsCounter, 457 mSDsluCounter, 2823 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 12 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 5857 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:13:22,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 5857 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 746 Invalid, 4 Unknown, 0 Unchecked, 16.0s Time] [2022-11-23 16:13:22,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138231 states.