./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI --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 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 --- 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-5e519f3 [2022-11-03 03:46:32,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:46:32,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:46:32,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:46:32,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:46:32,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:46:32,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:46:32,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:46:32,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:46:32,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:46:32,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:46:32,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:46:32,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:46:32,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:46:32,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:46:32,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:46:32,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:46:32,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:46:32,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:46:32,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:46:32,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:46:32,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:46:32,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:46:32,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:46:32,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:46:32,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:46:32,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:46:32,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:46:32,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:46:32,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:46:32,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:46:32,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:46:32,082 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:46:32,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:46:32,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:46:32,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:46:32,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:46:32,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:46:32,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:46:32,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:46:32,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:46:32,092 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:46:32,115 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:46:32,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:46:32,115 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:46:32,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:46:32,116 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:46:32,116 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:46:32,117 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:46:32,117 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:46:32,117 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:46:32,117 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:46:32,117 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:46:32,118 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:46:32,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:46:32,118 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:46:32,118 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:46:32,118 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:46:32,118 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:46:32,119 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:46:32,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:46:32,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:46:32,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:46:32,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:46:32,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:46:32,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:46:32,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:46:32,125 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:46:32,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:46:32,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:46:32,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:46:32,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:46:32,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:46:32,127 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:46:32,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:46:32,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:46:32,128 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:46:32,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:46:32,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:46:32,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:46:32,130 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_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 [2022-11-03 03:46:32,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:46:32,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:46:32,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:46:32,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:46:32,473 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:46:32,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-03 03:46:32,558 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/data/440bd4641/29308e05326743c590abbf4aaac0c61f/FLAGca5c063cd [2022-11-03 03:46:33,434 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:46:33,434 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-03 03:46:33,478 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/data/440bd4641/29308e05326743c590abbf4aaac0c61f/FLAGca5c063cd [2022-11-03 03:46:33,902 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/data/440bd4641/29308e05326743c590abbf4aaac0c61f [2022-11-03 03:46:33,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:46:33,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:46:33,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:46:33,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:46:33,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:46:33,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:33" (1/1) ... [2022-11-03 03:46:33,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ab12d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:33, skipping insertion in model container [2022-11-03 03:46:33,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:33" (1/1) ... [2022-11-03 03:46:33,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:46:34,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:46:35,053 WARN L230 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_6f777696-40b8-4bd4-a530-3e9a53933c61/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-03 03:46:35,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:46:35,519 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:46:35,775 WARN L230 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_6f777696-40b8-4bd4-a530-3e9a53933c61/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-03 03:46:36,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:46:36,187 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:46:36,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36 WrapperNode [2022-11-03 03:46:36,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:46:36,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:46:36,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:46:36,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:46:36,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (1/1) ... [2022-11-03 03:46:36,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (1/1) ... [2022-11-03 03:46:36,421 INFO L138 Inliner]: procedures = 160, calls = 847, calls flagged for inlining = 71, calls inlined = 71, statements flattened = 2354 [2022-11-03 03:46:36,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:46:36,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:46:36,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:46:36,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:46:36,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (1/1) ... [2022-11-03 03:46:36,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (1/1) ... [2022-11-03 03:46:36,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (1/1) ... [2022-11-03 03:46:36,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (1/1) ... [2022-11-03 03:46:36,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (1/1) ... [2022-11-03 03:46:36,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (1/1) ... [2022-11-03 03:46:36,673 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (1/1) ... [2022-11-03 03:46:36,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (1/1) ... [2022-11-03 03:46:36,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:46:36,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:46:36,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:46:36,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:46:36,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (1/1) ... [2022-11-03 03:46:36,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:46:36,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:36,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:46:36,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:46:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-03 03:46:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-03 03:46:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2022-11-03 03:46:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2022-11-03 03:46:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_17 [2022-11-03 03:46:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_17 [2022-11-03 03:46:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2022-11-03 03:46:36,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2022-11-03 03:46:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-03 03:46:36,809 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-03 03:46:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 03:46:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 03:46:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:46:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-03 03:46:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-03 03:46:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure can_free_echo_skb [2022-11-03 03:46:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure can_free_echo_skb [2022-11-03 03:46:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-03 03:46:36,811 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-03 03:46:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-03 03:46:36,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-03 03:46:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-03 03:46:36,811 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-03 03:46:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 03:46:36,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 03:46:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:46:36,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:46:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-03 03:46:36,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-03 03:46:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-03 03:46:36,813 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-03 03:46:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 03:46:36,813 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 03:46:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-03 03:46:36,814 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-03 03:46:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:46:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 03:46:36,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 03:46:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-03 03:46:36,815 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-03 03:46:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 03:46:36,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 03:46:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:46:36,815 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:46:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-03 03:46:36,816 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-03 03:46:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:46:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-03 03:46:36,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-03 03:46:36,818 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_4 [2022-11-03 03:46:36,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_4 [2022-11-03 03:46:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:46:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-03 03:46:36,820 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-03 03:46:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 03:46:36,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 03:46:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:46:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:46:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 03:46:36,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 03:46:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-03 03:46:36,823 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-03 03:46:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-03 03:46:36,823 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-03 03:46:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:46:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-03 03:46:36,824 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-03 03:46:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-03 03:46:36,824 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-03 03:46:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-03 03:46:36,824 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-03 03:46:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:46:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:46:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 03:46:36,826 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 03:46:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_read_bulk_callback [2022-11-03 03:46:36,826 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_read_bulk_callback [2022-11-03 03:46:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_send_msg [2022-11-03 03:46:36,827 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_send_msg [2022-11-03 03:46:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-03 03:46:36,827 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-03 03:46:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 03:46:36,828 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 03:46:36,828 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 03:46:36,828 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 03:46:36,828 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-03 03:46:36,829 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-03 03:46:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 03:46:36,830 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 03:46:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-03 03:46:36,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-03 03:46:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-03 03:46:36,831 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-03 03:46:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:46:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-03 03:46:36,832 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-03 03:46:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 03:46:36,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 03:46:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-03 03:46:36,832 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-03 03:46:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_disconnect [2022-11-03 03:46:36,833 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_disconnect [2022-11-03 03:46:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:46:36,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:46:37,533 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:46:37,536 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:46:37,823 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 03:46:38,610 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-03 03:46:39,832 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:46:40,484 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:46:40,488 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 03:46:40,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:46:40 BoogieIcfgContainer [2022-11-03 03:46:40,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:46:40,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:46:40,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:46:40,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:46:40,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:46:33" (1/3) ... [2022-11-03 03:46:40,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6a4cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:46:40, skipping insertion in model container [2022-11-03 03:46:40,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:36" (2/3) ... [2022-11-03 03:46:40,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6a4cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:46:40, skipping insertion in model container [2022-11-03 03:46:40,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:46:40" (3/3) ... [2022-11-03 03:46:40,516 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-03 03:46:40,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:46:40,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:46:40,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:46:40,624 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;@47b165a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:46:40,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:46:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 516 states, 328 states have (on average 1.3902439024390243) internal successors, (456), 356 states have internal predecessors, (456), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) [2022-11-03 03:46:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 03:46:40,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:40,648 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:40,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1410048002, now seen corresponding path program 1 times [2022-11-03 03:46:40,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:40,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195491208] [2022-11-03 03:46:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:40,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-03 03:46:41,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:41,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195491208] [2022-11-03 03:46:41,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195491208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:41,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:41,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:46:41,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472549127] [2022-11-03 03:46:41,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:41,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:46:41,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:46:41,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:41,428 INFO L87 Difference]: Start difference. First operand has 516 states, 328 states have (on average 1.3902439024390243) internal successors, (456), 356 states have internal predecessors, (456), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-03 03:46:44,309 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 [] [2022-11-03 03:46:45,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:47,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:47,551 INFO L93 Difference]: Finished difference Result 1478 states and 2091 transitions. [2022-11-03 03:46:47,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:46:47,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 78 [2022-11-03 03:46:47,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:47,580 INFO L225 Difference]: With dead ends: 1478 [2022-11-03 03:46:47,580 INFO L226 Difference]: Without dead ends: 961 [2022-11-03 03:46:47,588 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 [2022-11-03 03:46:47,591 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 655 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:47,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1348 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2022-11-03 03:46:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-11-03 03:46:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 961. [2022-11-03 03:46:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 627 states have (on average 1.3604465709728868) internal successors, (853), 657 states have internal predecessors, (853), 247 states have call successors, (247), 87 states have call predecessors, (247), 86 states have return successors, (243), 240 states have call predecessors, (243), 242 states have call successors, (243) [2022-11-03 03:46:47,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1343 transitions. [2022-11-03 03:46:47,759 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1343 transitions. Word has length 78 [2022-11-03 03:46:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:47,760 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1343 transitions. [2022-11-03 03:46:47,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-03 03:46:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1343 transitions. [2022-11-03 03:46:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 03:46:47,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:47,769 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:47,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:46:47,769 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash 58869372, now seen corresponding path program 1 times [2022-11-03 03:46:47,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:47,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995068475] [2022-11-03 03:46:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:47,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:46:48,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:48,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995068475] [2022-11-03 03:46:48,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995068475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:48,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:48,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:46:48,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268949602] [2022-11-03 03:46:48,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:48,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:46:48,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:48,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:46:48,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:48,546 INFO L87 Difference]: Start difference. First operand 961 states and 1343 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:46:51,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:54,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:54,255 INFO L93 Difference]: Finished difference Result 1525 states and 2127 transitions. [2022-11-03 03:46:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:46:54,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 87 [2022-11-03 03:46:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:54,295 INFO L225 Difference]: With dead ends: 1525 [2022-11-03 03:46:54,295 INFO L226 Difference]: Without dead ends: 1522 [2022-11-03 03:46:54,297 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 [2022-11-03 03:46:54,298 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 398 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:54,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 1239 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 03:46:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-11-03 03:46:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1510. [2022-11-03 03:46:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 992 states have (on average 1.3669354838709677) internal successors, (1356), 1034 states have internal predecessors, (1356), 379 states have call successors, (379), 141 states have call predecessors, (379), 138 states have return successors, (375), 366 states have call predecessors, (375), 374 states have call successors, (375) [2022-11-03 03:46:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 2110 transitions. [2022-11-03 03:46:54,449 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 2110 transitions. Word has length 87 [2022-11-03 03:46:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:54,452 INFO L495 AbstractCegarLoop]: Abstraction has 1510 states and 2110 transitions. [2022-11-03 03:46:54,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:46:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 2110 transitions. [2022-11-03 03:46:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 03:46:54,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:54,465 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:54,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:46:54,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:54,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:54,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1824641189, now seen corresponding path program 1 times [2022-11-03 03:46:54,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:54,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541127086] [2022-11-03 03:46:54,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:54,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:46:55,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:55,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541127086] [2022-11-03 03:46:55,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541127086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:55,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:55,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:46:55,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525372396] [2022-11-03 03:46:55,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:55,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:46:55,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:46:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:55,091 INFO L87 Difference]: Start difference. First operand 1510 states and 2110 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:46:57,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:59,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:00,118 INFO L93 Difference]: Finished difference Result 2985 states and 4165 transitions. [2022-11-03 03:47:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:00,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 88 [2022-11-03 03:47:00,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:00,139 INFO L225 Difference]: With dead ends: 2985 [2022-11-03 03:47:00,139 INFO L226 Difference]: Without dead ends: 2982 [2022-11-03 03:47:00,143 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 [2022-11-03 03:47:00,149 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 654 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:00,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1295 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 213 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 03:47:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2022-11-03 03:47:00,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2965. [2022-11-03 03:47:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 1951 states have (on average 1.3675038441824705) internal successors, (2668), 2035 states have internal predecessors, (2668), 737 states have call successors, (737), 281 states have call predecessors, (737), 276 states have return successors, (735), 712 states have call predecessors, (735), 732 states have call successors, (735) [2022-11-03 03:47:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 4140 transitions. [2022-11-03 03:47:00,370 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 4140 transitions. Word has length 88 [2022-11-03 03:47:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:00,373 INFO L495 AbstractCegarLoop]: Abstraction has 2965 states and 4140 transitions. [2022-11-03 03:47:00,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:47:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 4140 transitions. [2022-11-03 03:47:00,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 03:47:00,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:00,377 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:00,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:47:00,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash 728997535, now seen corresponding path program 1 times [2022-11-03 03:47:00,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:00,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017195843] [2022-11-03 03:47:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:00,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:47:00,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:00,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017195843] [2022-11-03 03:47:00,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017195843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:00,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:00,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:00,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025266316] [2022-11-03 03:47:00,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:00,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:00,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:00,615 INFO L87 Difference]: Start difference. First operand 2965 states and 4140 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:47:03,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:05,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:05,704 INFO L93 Difference]: Finished difference Result 2980 states and 4158 transitions. [2022-11-03 03:47:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:05,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 89 [2022-11-03 03:47:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:05,723 INFO L225 Difference]: With dead ends: 2980 [2022-11-03 03:47:05,723 INFO L226 Difference]: Without dead ends: 2977 [2022-11-03 03:47:05,726 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 [2022-11-03 03:47:05,727 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 651 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:05,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1290 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 03:47:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2022-11-03 03:47:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2966. [2022-11-03 03:47:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 1952 states have (on average 1.3673155737704918) internal successors, (2669), 2036 states have internal predecessors, (2669), 737 states have call successors, (737), 281 states have call predecessors, (737), 276 states have return successors, (735), 712 states have call predecessors, (735), 732 states have call successors, (735) [2022-11-03 03:47:05,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 4141 transitions. [2022-11-03 03:47:05,956 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 4141 transitions. Word has length 89 [2022-11-03 03:47:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:05,957 INFO L495 AbstractCegarLoop]: Abstraction has 2966 states and 4141 transitions. [2022-11-03 03:47:05,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:47:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 4141 transitions. [2022-11-03 03:47:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-03 03:47:05,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:05,967 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:05,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:47:05,968 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:05,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1123787496, now seen corresponding path program 1 times [2022-11-03 03:47:05,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:05,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738022180] [2022-11-03 03:47:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:05,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:47:06,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:06,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738022180] [2022-11-03 03:47:06,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738022180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:06,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:06,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:06,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91742626] [2022-11-03 03:47:06,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:06,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:06,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:06,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:06,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:06,170 INFO L87 Difference]: Start difference. First operand 2966 states and 4141 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:47:08,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:10,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:11,332 INFO L93 Difference]: Finished difference Result 2981 states and 4159 transitions. [2022-11-03 03:47:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 90 [2022-11-03 03:47:11,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:11,355 INFO L225 Difference]: With dead ends: 2981 [2022-11-03 03:47:11,355 INFO L226 Difference]: Without dead ends: 2978 [2022-11-03 03:47:11,358 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 [2022-11-03 03:47:11,362 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 648 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:11,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 1293 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-11-03 03:47:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2022-11-03 03:47:11,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 2967. [2022-11-03 03:47:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2967 states, 1953 states have (on average 1.3671274961597542) internal successors, (2670), 2037 states have internal predecessors, (2670), 737 states have call successors, (737), 281 states have call predecessors, (737), 276 states have return successors, (735), 712 states have call predecessors, (735), 732 states have call successors, (735) [2022-11-03 03:47:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 4142 transitions. [2022-11-03 03:47:11,619 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 4142 transitions. Word has length 90 [2022-11-03 03:47:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:11,620 INFO L495 AbstractCegarLoop]: Abstraction has 2967 states and 4142 transitions. [2022-11-03 03:47:11,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:47:11,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 4142 transitions. [2022-11-03 03:47:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 03:47:11,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:11,623 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:11,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:47:11,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash 477379266, now seen corresponding path program 1 times [2022-11-03 03:47:11,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:11,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625461925] [2022-11-03 03:47:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:11,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:47:11,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:11,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625461925] [2022-11-03 03:47:11,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625461925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:11,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:11,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:11,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367271351] [2022-11-03 03:47:11,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:11,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:11,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:11,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:11,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:11,809 INFO L87 Difference]: Start difference. First operand 2967 states and 4142 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:47:14,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:16,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:16,073 INFO L93 Difference]: Finished difference Result 3140 states and 4359 transitions. [2022-11-03 03:47:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:16,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 91 [2022-11-03 03:47:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:16,094 INFO L225 Difference]: With dead ends: 3140 [2022-11-03 03:47:16,094 INFO L226 Difference]: Without dead ends: 3131 [2022-11-03 03:47:16,096 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 [2022-11-03 03:47:16,097 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 657 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:16,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 822 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 03:47:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-11-03 03:47:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2022-11-03 03:47:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2056 states have (on average 1.3638132295719845) internal successors, (2804), 2145 states have internal predecessors, (2804), 771 states have call successors, (771), 308 states have call predecessors, (771), 303 states have return successors, (771), 746 states have call predecessors, (771), 767 states have call successors, (771) [2022-11-03 03:47:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4346 transitions. [2022-11-03 03:47:16,316 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4346 transitions. Word has length 91 [2022-11-03 03:47:16,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:16,317 INFO L495 AbstractCegarLoop]: Abstraction has 3131 states and 4346 transitions. [2022-11-03 03:47:16,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:47:16,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4346 transitions. [2022-11-03 03:47:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:47:16,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:16,323 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2022-11-03 03:47:16,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:47:16,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:16,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1363746481, now seen corresponding path program 1 times [2022-11-03 03:47:16,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:16,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816261120] [2022-11-03 03:47:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:16,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:47:16,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:16,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816261120] [2022-11-03 03:47:16,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816261120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:16,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:16,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:16,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459853986] [2022-11-03 03:47:16,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:16,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:16,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:16,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:16,575 INFO L87 Difference]: Start difference. First operand 3131 states and 4346 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:47:19,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:21,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:21,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:21,650 INFO L93 Difference]: Finished difference Result 7556 states and 10448 transitions. [2022-11-03 03:47:21,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:21,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 127 [2022-11-03 03:47:21,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:21,676 INFO L225 Difference]: With dead ends: 7556 [2022-11-03 03:47:21,677 INFO L226 Difference]: Without dead ends: 4448 [2022-11-03 03:47:21,689 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 [2022-11-03 03:47:21,690 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 267 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:21,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1205 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 219 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 03:47:21,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2022-11-03 03:47:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 4425. [2022-11-03 03:47:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 2920 states have (on average 1.3626712328767123) internal successors, (3979), 3033 states have internal predecessors, (3979), 1060 states have call successors, (1060), 449 states have call predecessors, (1060), 444 states have return successors, (1060), 1027 states have call predecessors, (1060), 1056 states have call successors, (1060) [2022-11-03 03:47:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 6099 transitions. [2022-11-03 03:47:22,044 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 6099 transitions. Word has length 127 [2022-11-03 03:47:22,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:22,045 INFO L495 AbstractCegarLoop]: Abstraction has 4425 states and 6099 transitions. [2022-11-03 03:47:22,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:47:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 6099 transitions. [2022-11-03 03:47:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 03:47:22,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:22,050 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 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] [2022-11-03 03:47:22,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:47:22,051 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:22,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2004621114, now seen corresponding path program 1 times [2022-11-03 03:47:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:22,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546523287] [2022-11-03 03:47:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:22,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-03 03:47:22,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:22,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546523287] [2022-11-03 03:47:22,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546523287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:22,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:22,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:22,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970809948] [2022-11-03 03:47:22,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:22,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:22,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:22,289 INFO L87 Difference]: Start difference. First operand 4425 states and 6099 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:47:25,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:27,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:27,447 INFO L93 Difference]: Finished difference Result 10212 states and 14084 transitions. [2022-11-03 03:47:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 140 [2022-11-03 03:47:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:27,478 INFO L225 Difference]: With dead ends: 10212 [2022-11-03 03:47:27,478 INFO L226 Difference]: Without dead ends: 5816 [2022-11-03 03:47:27,491 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 [2022-11-03 03:47:27,492 INFO L413 NwaCegarLoop]: 793 mSDtfsCounter, 244 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:27,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 1376 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 03:47:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5816 states. [2022-11-03 03:47:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5816 to 5793. [2022-11-03 03:47:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5793 states, 3860 states have (on average 1.3650259067357513) internal successors, (5269), 3997 states have internal predecessors, (5269), 1348 states have call successors, (1348), 589 states have call predecessors, (1348), 584 states have return successors, (1348), 1307 states have call predecessors, (1348), 1344 states have call successors, (1348) [2022-11-03 03:47:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5793 states to 5793 states and 7965 transitions. [2022-11-03 03:47:27,914 INFO L78 Accepts]: Start accepts. Automaton has 5793 states and 7965 transitions. Word has length 140 [2022-11-03 03:47:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:27,914 INFO L495 AbstractCegarLoop]: Abstraction has 5793 states and 7965 transitions. [2022-11-03 03:47:27,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:47:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5793 states and 7965 transitions. [2022-11-03 03:47:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 03:47:27,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:27,921 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 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] [2022-11-03 03:47:27,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:47:27,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash 741373629, now seen corresponding path program 1 times [2022-11-03 03:47:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:27,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494156271] [2022-11-03 03:47:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:27,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-03 03:47:28,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:28,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494156271] [2022-11-03 03:47:28,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494156271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:28,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:28,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:28,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56217121] [2022-11-03 03:47:28,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:28,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:28,222 INFO L87 Difference]: Start difference. First operand 5793 states and 7965 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:47:31,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:33,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:34,131 INFO L93 Difference]: Finished difference Result 12052 states and 17177 transitions. [2022-11-03 03:47:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:47:34,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 151 [2022-11-03 03:47:34,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:34,175 INFO L225 Difference]: With dead ends: 12052 [2022-11-03 03:47:34,175 INFO L226 Difference]: Without dead ends: 8642 [2022-11-03 03:47:34,187 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 [2022-11-03 03:47:34,188 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 382 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 96 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:34,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 2146 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 349 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2022-11-03 03:47:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8642 states. [2022-11-03 03:47:34,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8642 to 5809. [2022-11-03 03:47:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 3876 states have (on average 1.3635190918472653) internal successors, (5285), 4013 states have internal predecessors, (5285), 1348 states have call successors, (1348), 589 states have call predecessors, (1348), 584 states have return successors, (1348), 1307 states have call predecessors, (1348), 1344 states have call successors, (1348) [2022-11-03 03:47:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 7981 transitions. [2022-11-03 03:47:34,714 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 7981 transitions. Word has length 151 [2022-11-03 03:47:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:34,715 INFO L495 AbstractCegarLoop]: Abstraction has 5809 states and 7981 transitions. [2022-11-03 03:47:34,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:47:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 7981 transitions. [2022-11-03 03:47:34,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 03:47:34,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:34,721 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 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] [2022-11-03 03:47:34,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:47:34,722 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:34,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:34,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1391675229, now seen corresponding path program 1 times [2022-11-03 03:47:34,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:34,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011174510] [2022-11-03 03:47:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:34,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-03 03:47:35,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011174510] [2022-11-03 03:47:35,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011174510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771175012] [2022-11-03 03:47:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:35,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:35,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:35,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:35,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:47:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:36,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:36,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 70 proven. 10 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-03 03:47:36,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2022-11-03 03:47:37,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771175012] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:37,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:47:37,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 11 [2022-11-03 03:47:37,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742663488] [2022-11-03 03:47:37,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:37,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:37,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:37,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:47:37,139 INFO L87 Difference]: Start difference. First operand 5809 states and 7981 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-03 03:47:40,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:43,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:45,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:47,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:49,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:51,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:53,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:53,721 INFO L93 Difference]: Finished difference Result 14361 states and 19826 transitions. [2022-11-03 03:47:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:53,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 160 [2022-11-03 03:47:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:53,760 INFO L225 Difference]: With dead ends: 14361 [2022-11-03 03:47:53,760 INFO L226 Difference]: Without dead ends: 8581 [2022-11-03 03:47:53,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:47:53,778 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 1434 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 428 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:53,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 1571 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 487 Invalid, 6 Unknown, 0 Unchecked, 15.7s Time] [2022-11-03 03:47:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8581 states. [2022-11-03 03:47:54,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8581 to 7805. [2022-11-03 03:47:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7805 states, 5216 states have (on average 1.3640720858895705) internal successors, (7115), 5393 states have internal predecessors, (7115), 1760 states have call successors, (1760), 837 states have call predecessors, (1760), 828 states have return successors, (1764), 1707 states have call predecessors, (1764), 1756 states have call successors, (1764) [2022-11-03 03:47:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7805 states to 7805 states and 10639 transitions. [2022-11-03 03:47:54,515 INFO L78 Accepts]: Start accepts. Automaton has 7805 states and 10639 transitions. Word has length 160 [2022-11-03 03:47:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:54,516 INFO L495 AbstractCegarLoop]: Abstraction has 7805 states and 10639 transitions. [2022-11-03 03:47:54,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-03 03:47:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 7805 states and 10639 transitions. [2022-11-03 03:47:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:47:54,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:54,525 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 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] [2022-11-03 03:47:54,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:54,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:54,749 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash -730642409, now seen corresponding path program 1 times [2022-11-03 03:47:54,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:54,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259102936] [2022-11-03 03:47:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:54,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-03 03:47:55,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:55,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259102936] [2022-11-03 03:47:55,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259102936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:55,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:55,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:55,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592566154] [2022-11-03 03:47:55,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:55,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:55,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:55,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:55,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:55,054 INFO L87 Difference]: Start difference. First operand 7805 states and 10639 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:47:57,668 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 [] [2022-11-03 03:47:59,946 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 [] [2022-11-03 03:48:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:00,246 INFO L93 Difference]: Finished difference Result 15589 states and 21253 transitions. [2022-11-03 03:48:00,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:00,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 182 [2022-11-03 03:48:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:00,328 INFO L225 Difference]: With dead ends: 15589 [2022-11-03 03:48:00,329 INFO L226 Difference]: Without dead ends: 7813 [2022-11-03 03:48:00,352 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 [2022-11-03 03:48:00,353 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 0 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:00,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1189 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 03:48:00,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2022-11-03 03:48:01,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 7813. [2022-11-03 03:48:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7813 states, 5224 states have (on average 1.3635145482388975) internal successors, (7123), 5401 states have internal predecessors, (7123), 1760 states have call successors, (1760), 837 states have call predecessors, (1760), 828 states have return successors, (1764), 1707 states have call predecessors, (1764), 1756 states have call successors, (1764) [2022-11-03 03:48:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7813 states to 7813 states and 10647 transitions. [2022-11-03 03:48:01,059 INFO L78 Accepts]: Start accepts. Automaton has 7813 states and 10647 transitions. Word has length 182 [2022-11-03 03:48:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:01,060 INFO L495 AbstractCegarLoop]: Abstraction has 7813 states and 10647 transitions. [2022-11-03 03:48:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:48:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 7813 states and 10647 transitions. [2022-11-03 03:48:01,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-03 03:48:01,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:01,069 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:01,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:48:01,070 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:01,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1884369566, now seen corresponding path program 1 times [2022-11-03 03:48:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:01,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017565220] [2022-11-03 03:48:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:01,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-11-03 03:48:02,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:02,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017565220] [2022-11-03 03:48:02,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017565220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:02,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897210434] [2022-11-03 03:48:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:02,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:02,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:02,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:02,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:48:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:02,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1924 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:48:02,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2022-11-03 03:48:02,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-03 03:48:03,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897210434] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:03,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:48:03,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 12 [2022-11-03 03:48:03,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78567932] [2022-11-03 03:48:03,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:03,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:48:03,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:48:03,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:48:03,120 INFO L87 Difference]: Start difference. First operand 7813 states and 10647 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 03:48:06,417 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 [] [2022-11-03 03:48:08,986 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 [] [2022-11-03 03:48:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:09,545 INFO L93 Difference]: Finished difference Result 20065 states and 27919 transitions. [2022-11-03 03:48:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:48:09,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 176 [2022-11-03 03:48:09,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:09,595 INFO L225 Difference]: With dead ends: 20065 [2022-11-03 03:48:09,596 INFO L226 Difference]: Without dead ends: 12281 [2022-11-03 03:48:09,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:48:09,622 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 683 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:09,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 1556 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 579 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-11-03 03:48:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12281 states. [2022-11-03 03:48:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12281 to 9849. [2022-11-03 03:48:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 6618 states have (on average 1.3700513750377759) internal successors, (9067), 6831 states have internal predecessors, (9067), 2192 states have call successors, (2192), 1047 states have call predecessors, (2192), 1038 states have return successors, (2196), 2127 states have call predecessors, (2196), 2188 states have call successors, (2196) [2022-11-03 03:48:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 13455 transitions. [2022-11-03 03:48:10,379 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 13455 transitions. Word has length 176 [2022-11-03 03:48:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:10,380 INFO L495 AbstractCegarLoop]: Abstraction has 9849 states and 13455 transitions. [2022-11-03 03:48:10,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 03:48:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 13455 transitions. [2022-11-03 03:48:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-03 03:48:10,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:10,390 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 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] [2022-11-03 03:48:10,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:10,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:48:10,617 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1798391677, now seen corresponding path program 1 times [2022-11-03 03:48:10,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:10,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858184846] [2022-11-03 03:48:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:10,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-03 03:48:10,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858184846] [2022-11-03 03:48:10,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858184846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075272198] [2022-11-03 03:48:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:10,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:10,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:10,962 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:10,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:48:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 2097 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:48:11,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-03 03:48:11,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-03 03:48:11,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075272198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:11,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743558808] [2022-11-03 03:48:11,883 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2022-11-03 03:48:11,883 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:48:11,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:48:11,896 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:48:11,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:48:16,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:16,467 INFO L244 Elim1Store]: Index analysis took 199 ms [2022-11-03 03:48:16,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 114 select indices, 114 select index equivalence classes, 1253 disjoint index pairs (out of 6441 index pairs), introduced 114 new quantified variables, introduced 0 case distinctions, treesize of input 1003 treesize of output 343 [2022-11-03 03:48:18,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:18,904 INFO L244 Elim1Store]: Index analysis took 179 ms [2022-11-03 03:48:18,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 114 select indices, 114 select index equivalence classes, 1253 disjoint index pairs (out of 6441 index pairs), introduced 114 new quantified variables, introduced 0 case distinctions, treesize of input 1003 treesize of output 343 [2022-11-03 03:49:27,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:27,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:49:27,744 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 03:49:27,747 INFO L158 Benchmark]: Toolchain (without parser) took 173840.07ms. Allocated memory was 96.5MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 69.7MB in the beginning and 970.5MB in the end (delta: -900.8MB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2022-11-03 03:49:27,748 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 96.5MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:49:27,748 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2280.12ms. Allocated memory was 96.5MB in the beginning and 138.4MB in the end (delta: 41.9MB). Free memory was 69.7MB in the beginning and 72.0MB in the end (delta: -2.3MB). Peak memory consumption was 62.6MB. Max. memory is 16.1GB. [2022-11-03 03:49:27,748 INFO L158 Benchmark]: Boogie Procedure Inliner took 231.82ms. Allocated memory is still 138.4MB. Free memory was 72.0MB in the beginning and 57.2MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 03:49:27,748 INFO L158 Benchmark]: Boogie Preprocessor took 291.46ms. Allocated memory is still 138.4MB. Free memory was 57.2MB in the beginning and 70.8MB in the end (delta: -13.6MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2022-11-03 03:49:27,749 INFO L158 Benchmark]: RCFGBuilder took 3780.05ms. Allocated memory was 138.4MB in the beginning and 295.7MB in the end (delta: 157.3MB). Free memory was 70.8MB in the beginning and 215.4MB in the end (delta: -144.6MB). Peak memory consumption was 99.4MB. Max. memory is 16.1GB. [2022-11-03 03:49:27,749 INFO L158 Benchmark]: TraceAbstraction took 167247.24ms. Allocated memory was 295.7MB in the beginning and 1.7GB in the end (delta: 1.4GB). Free memory was 214.3MB in the beginning and 970.5MB in the end (delta: -756.2MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2022-11-03 03:49:27,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 96.5MB. Free memory is still 75.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2280.12ms. Allocated memory was 96.5MB in the beginning and 138.4MB in the end (delta: 41.9MB). Free memory was 69.7MB in the beginning and 72.0MB in the end (delta: -2.3MB). Peak memory consumption was 62.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 231.82ms. Allocated memory is still 138.4MB. Free memory was 72.0MB in the beginning and 57.2MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 291.46ms. Allocated memory is still 138.4MB. Free memory was 57.2MB in the beginning and 70.8MB in the end (delta: -13.6MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. * RCFGBuilder took 3780.05ms. Allocated memory was 138.4MB in the beginning and 295.7MB in the end (delta: 157.3MB). Free memory was 70.8MB in the beginning and 215.4MB in the end (delta: -144.6MB). Peak memory consumption was 99.4MB. Max. memory is 16.1GB. * TraceAbstraction took 167247.24ms. Allocated memory was 295.7MB in the beginning and 1.7GB in the end (delta: 1.4GB). Free memory was 214.3MB in the beginning and 970.5MB in the end (delta: -756.2MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 03:49:27,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI --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 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 --- 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-5e519f3 [2022-11-03 03:49:30,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:49:30,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:49:30,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:49:30,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:49:30,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:49:30,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:49:30,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:49:30,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:49:30,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:49:30,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:49:30,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:49:30,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:49:30,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:49:30,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:49:30,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:49:30,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:49:30,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:49:30,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:49:30,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:49:30,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:49:30,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:49:30,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:49:30,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:49:30,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:49:30,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:49:30,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:49:30,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:49:30,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:49:30,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:49:30,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:49:30,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:49:30,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:49:30,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:49:30,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:49:30,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:49:30,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:49:30,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:49:30,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:49:30,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:49:30,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:49:30,260 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:49:30,285 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:49:30,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:49:30,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:49:30,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:49:30,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:49:30,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:49:30,288 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:49:30,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:49:30,288 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:49:30,289 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:49:30,289 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:49:30,289 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:49:30,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:49:30,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:49:30,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:49:30,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:49:30,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:49:30,291 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:49:30,291 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:49:30,292 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:49:30,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:49:30,292 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:49:30,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:49:30,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:49:30,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:49:30,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:49:30,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:49:30,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:49:30,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:49:30,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:49:30,294 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:49:30,295 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:30,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:49:30,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:49:30,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:49:30,296 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 [2022-11-03 03:49:30,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:49:30,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:49:30,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:49:30,725 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:49:30,726 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:49:30,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-03 03:49:30,814 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/data/0173966d5/830c4dc907a94479bd2fddc390ae8d1f/FLAGbd952a535 [2022-11-03 03:49:31,726 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:49:31,727 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-03 03:49:31,763 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/data/0173966d5/830c4dc907a94479bd2fddc390ae8d1f/FLAGbd952a535 [2022-11-03 03:49:32,281 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/data/0173966d5/830c4dc907a94479bd2fddc390ae8d1f [2022-11-03 03:49:32,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:49:32,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:49:32,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:49:32,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:49:32,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:49:32,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:49:32" (1/1) ... [2022-11-03 03:49:32,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@443058be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:32, skipping insertion in model container [2022-11-03 03:49:32,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:49:32" (1/1) ... [2022-11-03 03:49:32,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:49:32,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:49:33,456 WARN L230 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_6f777696-40b8-4bd4-a530-3e9a53933c61/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-03 03:49:33,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:49:33,970 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 03:49:34,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:49:34,227 WARN L230 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_6f777696-40b8-4bd4-a530-3e9a53933c61/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-03 03:49:34,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:49:34,404 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:49:34,555 WARN L230 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_6f777696-40b8-4bd4-a530-3e9a53933c61/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-03 03:49:34,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:49:34,969 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:49:34,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34 WrapperNode [2022-11-03 03:49:34,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:49:34,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:49:34,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:49:34,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:49:34,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (1/1) ... [2022-11-03 03:49:35,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (1/1) ... [2022-11-03 03:49:35,159 INFO L138 Inliner]: procedures = 169, calls = 847, calls flagged for inlining = 71, calls inlined = 71, statements flattened = 2294 [2022-11-03 03:49:35,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:49:35,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:49:35,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:49:35,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:49:35,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (1/1) ... [2022-11-03 03:49:35,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (1/1) ... [2022-11-03 03:49:35,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (1/1) ... [2022-11-03 03:49:35,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (1/1) ... [2022-11-03 03:49:35,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (1/1) ... [2022-11-03 03:49:35,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (1/1) ... [2022-11-03 03:49:35,348 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (1/1) ... [2022-11-03 03:49:35,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (1/1) ... [2022-11-03 03:49:35,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:49:35,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:49:35,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:49:35,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:49:35,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (1/1) ... [2022-11-03 03:49:35,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:49:35,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:35,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:49:35,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:49:35,499 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-03 03:49:35,499 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-03 03:49:35,499 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2022-11-03 03:49:35,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2022-11-03 03:49:35,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 03:49:35,500 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_17 [2022-11-03 03:49:35,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_17 [2022-11-03 03:49:35,500 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2022-11-03 03:49:35,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2022-11-03 03:49:35,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-03 03:49:35,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 03:49:35,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-11-03 03:49:35,502 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-03 03:49:35,502 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-03 03:49:35,502 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 03:49:35,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 03:49:35,502 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-03 03:49:35,503 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-03 03:49:35,503 INFO L130 BoogieDeclarations]: Found specification of procedure can_free_echo_skb [2022-11-03 03:49:35,503 INFO L138 BoogieDeclarations]: Found implementation of procedure can_free_echo_skb [2022-11-03 03:49:35,503 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-03 03:49:35,503 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-03 03:49:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-03 03:49:35,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-03 03:49:35,504 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-03 03:49:35,505 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-03 03:49:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 03:49:35,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 03:49:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:49:35,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:49:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-03 03:49:35,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-03 03:49:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-03 03:49:35,507 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-03 03:49:35,507 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 03:49:35,507 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 03:49:35,508 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-03 03:49:35,508 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-03 03:49:35,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 03:49:35,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 03:49:35,508 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-03 03:49:35,509 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-03 03:49:35,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 03:49:35,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 03:49:35,510 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:49:35,510 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:49:35,510 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-03 03:49:35,511 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-03 03:49:35,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:49:35,512 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-03 03:49:35,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-03 03:49:35,514 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_4 [2022-11-03 03:49:35,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_4 [2022-11-03 03:49:35,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:49:35,515 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-03 03:49:35,515 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-03 03:49:35,515 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 03:49:35,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 03:49:35,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:49:35,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:49:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 03:49:35,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 03:49:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-03 03:49:35,517 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-03 03:49:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-03 03:49:35,518 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-03 03:49:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:49:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-03 03:49:35,519 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-03 03:49:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-03 03:49:35,519 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-03 03:49:35,520 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-03 03:49:35,520 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-03 03:49:35,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-03 03:49:35,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-03 03:49:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-11-03 03:49:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:49:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 03:49:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:49:35,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-11-03 03:49:35,522 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 03:49:35,523 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 03:49:35,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 03:49:35,523 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_read_bulk_callback [2022-11-03 03:49:35,523 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_read_bulk_callback [2022-11-03 03:49:35,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-03 03:49:35,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-11-03 03:49:35,525 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_send_msg [2022-11-03 03:49:35,525 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_send_msg [2022-11-03 03:49:35,525 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-03 03:49:35,526 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-03 03:49:35,526 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 03:49:35,526 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 03:49:35,526 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 03:49:35,526 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 03:49:35,527 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-03 03:49:35,527 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-03 03:49:35,527 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 03:49:35,527 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 03:49:35,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-03 03:49:35,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-03 03:49:35,528 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-03 03:49:35,528 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-03 03:49:35,528 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-03 03:49:35,528 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-03 03:49:35,528 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 03:49:35,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 03:49:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-03 03:49:35,529 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-03 03:49:35,529 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_disconnect [2022-11-03 03:49:35,530 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_disconnect [2022-11-03 03:49:35,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:49:35,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:49:36,232 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:49:36,237 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:49:36,545 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 03:49:44,323 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-03 03:49:57,413 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:49:57,427 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:49:57,427 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 03:49:57,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:49:57 BoogieIcfgContainer [2022-11-03 03:49:57,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:49:57,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:49:57,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:49:57,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:49:57,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:49:32" (1/3) ... [2022-11-03 03:49:57,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e52bb18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:49:57, skipping insertion in model container [2022-11-03 03:49:57,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:49:34" (2/3) ... [2022-11-03 03:49:57,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e52bb18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:49:57, skipping insertion in model container [2022-11-03 03:49:57,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:49:57" (3/3) ... [2022-11-03 03:49:57,441 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-03 03:49:57,462 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:49:57,463 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:49:57,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:49:57,540 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;@6fc94cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:49:57,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:49:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 689 states, 501 states have (on average 1.347305389221557) internal successors, (675), 529 states have internal predecessors, (675), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) [2022-11-03 03:49:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 03:49:57,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:57,563 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:57,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:57,569 INFO L85 PathProgramCache]: Analyzing trace with hash -620397686, now seen corresponding path program 1 times [2022-11-03 03:49:57,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:57,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299825848] [2022-11-03 03:49:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:57,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:57,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:57,593 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:57,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:49:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:49:58,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-03 03:49:58,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:58,653 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:58,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299825848] [2022-11-03 03:49:58,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299825848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:58,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:58,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:49:58,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527289137] [2022-11-03 03:49:58,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:58,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:49:58,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:58,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:49:58,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:49:58,700 INFO L87 Difference]: Start difference. First operand has 689 states, 501 states have (on average 1.347305389221557) internal successors, (675), 529 states have internal predecessors, (675), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-03 03:49:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:59,084 INFO L93 Difference]: Finished difference Result 2005 states and 2827 transitions. [2022-11-03 03:49:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:49:59,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 83 [2022-11-03 03:49:59,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:59,126 INFO L225 Difference]: With dead ends: 2005 [2022-11-03 03:49:59,126 INFO L226 Difference]: Without dead ends: 1293 [2022-11-03 03:49:59,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:49:59,143 INFO L413 NwaCegarLoop]: 1064 mSDtfsCounter, 868 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:59,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 1987 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:49:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-11-03 03:49:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1293. [2022-11-03 03:49:59,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 958 states have (on average 1.3298538622129437) internal successors, (1274), 988 states have internal predecessors, (1274), 248 states have call successors, (248), 87 states have call predecessors, (248), 86 states have return successors, (243), 241 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-03 03:49:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1765 transitions. [2022-11-03 03:49:59,356 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1765 transitions. Word has length 83 [2022-11-03 03:49:59,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:59,359 INFO L495 AbstractCegarLoop]: Abstraction has 1293 states and 1765 transitions. [2022-11-03 03:49:59,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-03 03:49:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1765 transitions. [2022-11-03 03:49:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 03:49:59,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:59,371 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:59,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:59,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:59,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:59,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1987436686, now seen corresponding path program 1 times [2022-11-03 03:49:59,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:59,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486552451] [2022-11-03 03:49:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:59,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:59,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:59,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:59,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:50:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:00,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:50:00,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:50:01,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:01,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:01,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486552451] [2022-11-03 03:50:01,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486552451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:01,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:01,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:50:01,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280195887] [2022-11-03 03:50:01,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:01,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:50:01,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:01,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:50:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:01,489 INFO L87 Difference]: Start difference. First operand 1293 states and 1765 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:50:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:01,825 INFO L93 Difference]: Finished difference Result 3828 states and 5238 transitions. [2022-11-03 03:50:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:50:01,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 93 [2022-11-03 03:50:01,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:01,841 INFO L225 Difference]: With dead ends: 3828 [2022-11-03 03:50:01,841 INFO L226 Difference]: Without dead ends: 2560 [2022-11-03 03:50:01,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:01,847 INFO L413 NwaCegarLoop]: 1323 mSDtfsCounter, 860 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:01,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 2197 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-11-03 03:50:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2550. [2022-11-03 03:50:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 1897 states have (on average 1.3299947285187137) internal successors, (2523), 1953 states have internal predecessors, (2523), 480 states have call successors, (480), 173 states have call predecessors, (480), 172 states have return successors, (485), 471 states have call predecessors, (485), 475 states have call successors, (485) [2022-11-03 03:50:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3488 transitions. [2022-11-03 03:50:02,039 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3488 transitions. Word has length 93 [2022-11-03 03:50:02,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:02,041 INFO L495 AbstractCegarLoop]: Abstraction has 2550 states and 3488 transitions. [2022-11-03 03:50:02,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:50:02,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3488 transitions. [2022-11-03 03:50:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 03:50:02,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:02,050 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:02,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:02,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:02,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:02,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1480685779, now seen corresponding path program 1 times [2022-11-03 03:50:02,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:02,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351317664] [2022-11-03 03:50:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:02,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:02,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:02,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:02,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:50:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:03,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:50:03,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:50:04,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:04,057 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:04,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351317664] [2022-11-03 03:50:04,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351317664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:04,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:04,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:50:04,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858362068] [2022-11-03 03:50:04,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:04,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:50:04,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:04,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:50:04,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:04,059 INFO L87 Difference]: Start difference. First operand 2550 states and 3488 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:50:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:04,243 INFO L93 Difference]: Finished difference Result 2552 states and 3489 transitions. [2022-11-03 03:50:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:50:04,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 94 [2022-11-03 03:50:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:04,260 INFO L225 Difference]: With dead ends: 2552 [2022-11-03 03:50:04,260 INFO L226 Difference]: Without dead ends: 2549 [2022-11-03 03:50:04,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:04,267 INFO L413 NwaCegarLoop]: 915 mSDtfsCounter, 858 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:04,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 915 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:04,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-11-03 03:50:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2549. [2022-11-03 03:50:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 1897 states have (on average 1.3294675803900897) internal successors, (2522), 1952 states have internal predecessors, (2522), 479 states have call successors, (479), 173 states have call predecessors, (479), 172 states have return successors, (485), 471 states have call predecessors, (485), 475 states have call successors, (485) [2022-11-03 03:50:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 3486 transitions. [2022-11-03 03:50:04,512 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 3486 transitions. Word has length 94 [2022-11-03 03:50:04,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:04,512 INFO L495 AbstractCegarLoop]: Abstraction has 2549 states and 3486 transitions. [2022-11-03 03:50:04,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:50:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 3486 transitions. [2022-11-03 03:50:04,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 03:50:04,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:04,518 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:04,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:04,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:04,733 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:04,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:04,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1343685583, now seen corresponding path program 1 times [2022-11-03 03:50:04,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:04,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068724040] [2022-11-03 03:50:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:04,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:04,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:04,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:04,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:50:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:05,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:50:05,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:50:05,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:05,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:05,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068724040] [2022-11-03 03:50:05,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068724040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:05,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:05,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:50:05,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850323785] [2022-11-03 03:50:05,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:05,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:50:05,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:05,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:50:05,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:05,945 INFO L87 Difference]: Start difference. First operand 2549 states and 3486 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:50:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:06,160 INFO L93 Difference]: Finished difference Result 2551 states and 3487 transitions. [2022-11-03 03:50:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:50:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 95 [2022-11-03 03:50:06,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:06,178 INFO L225 Difference]: With dead ends: 2551 [2022-11-03 03:50:06,178 INFO L226 Difference]: Without dead ends: 2548 [2022-11-03 03:50:06,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:06,182 INFO L413 NwaCegarLoop]: 913 mSDtfsCounter, 855 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:06,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 913 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2022-11-03 03:50:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2548. [2022-11-03 03:50:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 1897 states have (on average 1.3289404322614655) internal successors, (2521), 1951 states have internal predecessors, (2521), 478 states have call successors, (478), 173 states have call predecessors, (478), 172 states have return successors, (485), 471 states have call predecessors, (485), 475 states have call successors, (485) [2022-11-03 03:50:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 3484 transitions. [2022-11-03 03:50:06,456 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 3484 transitions. Word has length 95 [2022-11-03 03:50:06,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:06,458 INFO L495 AbstractCegarLoop]: Abstraction has 2548 states and 3484 transitions. [2022-11-03 03:50:06,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:50:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 3484 transitions. [2022-11-03 03:50:06,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-03 03:50:06,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:06,460 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:06,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:06,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:06,678 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:06,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1295120278, now seen corresponding path program 1 times [2022-11-03 03:50:06,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:06,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229687784] [2022-11-03 03:50:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:06,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:06,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:06,681 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:06,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:50:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:07,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:50:07,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:50:07,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:07,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:07,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229687784] [2022-11-03 03:50:07,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229687784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:07,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:07,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:50:07,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650598756] [2022-11-03 03:50:07,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:07,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:50:07,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:07,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:50:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:07,762 INFO L87 Difference]: Start difference. First operand 2548 states and 3484 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:50:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:07,981 INFO L93 Difference]: Finished difference Result 2550 states and 3485 transitions. [2022-11-03 03:50:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:50:07,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 96 [2022-11-03 03:50:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:07,998 INFO L225 Difference]: With dead ends: 2550 [2022-11-03 03:50:07,998 INFO L226 Difference]: Without dead ends: 2547 [2022-11-03 03:50:08,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:08,001 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 852 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:08,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 911 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2022-11-03 03:50:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2547. [2022-11-03 03:50:08,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 1897 states have (on average 1.3284132841328413) internal successors, (2520), 1950 states have internal predecessors, (2520), 477 states have call successors, (477), 173 states have call predecessors, (477), 172 states have return successors, (485), 471 states have call predecessors, (485), 475 states have call successors, (485) [2022-11-03 03:50:08,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 3482 transitions. [2022-11-03 03:50:08,263 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 3482 transitions. Word has length 96 [2022-11-03 03:50:08,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:08,264 INFO L495 AbstractCegarLoop]: Abstraction has 2547 states and 3482 transitions. [2022-11-03 03:50:08,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:50:08,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 3482 transitions. [2022-11-03 03:50:08,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 03:50:08,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:08,267 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:08,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:08,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:08,495 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1493728212, now seen corresponding path program 1 times [2022-11-03 03:50:08,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:08,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878063351] [2022-11-03 03:50:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:08,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:08,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:08,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:08,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:50:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:50:09,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:50:09,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:09,658 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:09,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878063351] [2022-11-03 03:50:09,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878063351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:09,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:09,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:50:09,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068008007] [2022-11-03 03:50:09,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:09,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:50:09,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:09,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:50:09,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:09,661 INFO L87 Difference]: Start difference. First operand 2547 states and 3482 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:50:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:09,913 INFO L93 Difference]: Finished difference Result 2549 states and 3483 transitions. [2022-11-03 03:50:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:50:09,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 97 [2022-11-03 03:50:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:09,927 INFO L225 Difference]: With dead ends: 2549 [2022-11-03 03:50:09,928 INFO L226 Difference]: Without dead ends: 2537 [2022-11-03 03:50:09,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:09,930 INFO L413 NwaCegarLoop]: 910 mSDtfsCounter, 849 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:09,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-11-03 03:50:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2537. [2022-11-03 03:50:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 1888 states have (on average 1.3278601694915255) internal successors, (2507), 1940 states have internal predecessors, (2507), 476 states have call successors, (476), 173 states have call predecessors, (476), 172 states have return successors, (485), 471 states have call predecessors, (485), 475 states have call successors, (485) [2022-11-03 03:50:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 3468 transitions. [2022-11-03 03:50:10,217 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 3468 transitions. Word has length 97 [2022-11-03 03:50:10,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:10,217 INFO L495 AbstractCegarLoop]: Abstraction has 2537 states and 3468 transitions. [2022-11-03 03:50:10,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:50:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 3468 transitions. [2022-11-03 03:50:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 03:50:10,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:10,225 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2022-11-03 03:50:10,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:10,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:10,445 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:10,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2031738073, now seen corresponding path program 1 times [2022-11-03 03:50:10,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:10,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046244898] [2022-11-03 03:50:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:10,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:10,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:10,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:10,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:50:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:50:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-03 03:50:11,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:11,566 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:11,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046244898] [2022-11-03 03:50:11,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046244898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:11,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:11,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:50:11,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864375125] [2022-11-03 03:50:11,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:11,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:50:11,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:50:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:11,569 INFO L87 Difference]: Start difference. First operand 2537 states and 3468 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:50:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:12,082 INFO L93 Difference]: Finished difference Result 5930 states and 8045 transitions. [2022-11-03 03:50:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:50:12,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 142 [2022-11-03 03:50:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:12,101 INFO L225 Difference]: With dead ends: 5930 [2022-11-03 03:50:12,101 INFO L226 Difference]: Without dead ends: 3418 [2022-11-03 03:50:12,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:12,110 INFO L413 NwaCegarLoop]: 968 mSDtfsCounter, 327 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:12,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1820 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2022-11-03 03:50:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3410. [2022-11-03 03:50:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 2541 states have (on average 1.3156237701692246) internal successors, (3343), 2601 states have internal predecessors, (3343), 625 states have call successors, (625), 244 states have call predecessors, (625), 243 states have return successors, (634), 620 states have call predecessors, (634), 624 states have call successors, (634) [2022-11-03 03:50:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 4602 transitions. [2022-11-03 03:50:12,582 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 4602 transitions. Word has length 142 [2022-11-03 03:50:12,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:12,583 INFO L495 AbstractCegarLoop]: Abstraction has 3410 states and 4602 transitions. [2022-11-03 03:50:12,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:50:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 4602 transitions. [2022-11-03 03:50:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-03 03:50:12,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:12,591 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 3, 3, 3, 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] [2022-11-03 03:50:12,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:12,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:12,801 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:12,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:12,802 INFO L85 PathProgramCache]: Analyzing trace with hash 622377365, now seen corresponding path program 1 times [2022-11-03 03:50:12,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:12,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073203988] [2022-11-03 03:50:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:12,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:12,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:12,806 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:12,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:50:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:13,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:50:13,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 03:50:13,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:13,919 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:13,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073203988] [2022-11-03 03:50:13,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073203988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:13,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:13,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:50:13,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604101835] [2022-11-03 03:50:13,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:13,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:50:13,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:13,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:50:13,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:13,922 INFO L87 Difference]: Start difference. First operand 3410 states and 4602 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:50:14,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:14,536 INFO L93 Difference]: Finished difference Result 7710 states and 10385 transitions. [2022-11-03 03:50:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:50:14,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 159 [2022-11-03 03:50:14,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:14,558 INFO L225 Difference]: With dead ends: 7710 [2022-11-03 03:50:14,559 INFO L226 Difference]: Without dead ends: 4332 [2022-11-03 03:50:14,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:14,569 INFO L413 NwaCegarLoop]: 1197 mSDtfsCounter, 304 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2077 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:14,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 2077 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2022-11-03 03:50:15,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 4324. [2022-11-03 03:50:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4324 states, 3237 states have (on average 1.3101637318504789) internal successors, (4241), 3305 states have internal predecessors, (4241), 773 states have call successors, (773), 314 states have call predecessors, (773), 313 states have return successors, (782), 768 states have call predecessors, (782), 772 states have call successors, (782) [2022-11-03 03:50:15,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4324 states to 4324 states and 5796 transitions. [2022-11-03 03:50:15,101 INFO L78 Accepts]: Start accepts. Automaton has 4324 states and 5796 transitions. Word has length 159 [2022-11-03 03:50:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:15,102 INFO L495 AbstractCegarLoop]: Abstraction has 4324 states and 5796 transitions. [2022-11-03 03:50:15,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:50:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 4324 states and 5796 transitions. [2022-11-03 03:50:15,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-03 03:50:15,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:15,110 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 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] [2022-11-03 03:50:15,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:15,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:15,328 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash -178294056, now seen corresponding path program 1 times [2022-11-03 03:50:15,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:15,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173344937] [2022-11-03 03:50:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:15,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:15,331 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:15,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:50:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:16,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:50:16,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-11-03 03:50:16,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:16,303 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:16,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173344937] [2022-11-03 03:50:16,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173344937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:16,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:16,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:50:16,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020780040] [2022-11-03 03:50:16,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:16,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:50:16,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:16,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:50:16,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:16,316 INFO L87 Difference]: Start difference. First operand 4324 states and 5796 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:50:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:17,150 INFO L93 Difference]: Finished difference Result 10410 states and 13891 transitions. [2022-11-03 03:50:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:50:17,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 173 [2022-11-03 03:50:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:17,178 INFO L225 Difference]: With dead ends: 10410 [2022-11-03 03:50:17,178 INFO L226 Difference]: Without dead ends: 6118 [2022-11-03 03:50:17,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:17,189 INFO L413 NwaCegarLoop]: 1471 mSDtfsCounter, 679 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:17,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 2264 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:50:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6118 states. [2022-11-03 03:50:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6118 to 6110. [2022-11-03 03:50:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6110 states, 4597 states have (on average 1.3106373721992604) internal successors, (6025), 4693 states have internal predecessors, (6025), 1037 states have call successors, (1037), 476 states have call predecessors, (1037), 475 states have return successors, (1046), 1028 states have call predecessors, (1046), 1036 states have call successors, (1046) [2022-11-03 03:50:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6110 states to 6110 states and 8108 transitions. [2022-11-03 03:50:17,817 INFO L78 Accepts]: Start accepts. Automaton has 6110 states and 8108 transitions. Word has length 173 [2022-11-03 03:50:17,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:17,818 INFO L495 AbstractCegarLoop]: Abstraction has 6110 states and 8108 transitions. [2022-11-03 03:50:17,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:50:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand 6110 states and 8108 transitions. [2022-11-03 03:50:17,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-03 03:50:17,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:17,827 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:17,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:18,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:18,054 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash 683399695, now seen corresponding path program 1 times [2022-11-03 03:50:18,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:18,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227338395] [2022-11-03 03:50:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:18,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:18,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:18,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:18,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:50:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:19,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:50:19,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-03 03:50:19,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:19,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:19,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227338395] [2022-11-03 03:50:19,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227338395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:19,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:19,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:50:19,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830441022] [2022-11-03 03:50:19,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:19,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:19,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:19,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:19,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:19,051 INFO L87 Difference]: Start difference. First operand 6110 states and 8108 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:50:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:20,337 INFO L93 Difference]: Finished difference Result 16244 states and 21721 transitions. [2022-11-03 03:50:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:20,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 192 [2022-11-03 03:50:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:20,375 INFO L225 Difference]: With dead ends: 16244 [2022-11-03 03:50:20,375 INFO L226 Difference]: Without dead ends: 10166 [2022-11-03 03:50:20,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:50:20,390 INFO L413 NwaCegarLoop]: 1611 mSDtfsCounter, 1059 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 4110 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:20,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 4110 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:50:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10166 states. [2022-11-03 03:50:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10166 to 6118. [2022-11-03 03:50:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6118 states, 4605 states have (on average 1.3100977198697068) internal successors, (6033), 4701 states have internal predecessors, (6033), 1037 states have call successors, (1037), 476 states have call predecessors, (1037), 475 states have return successors, (1046), 1028 states have call predecessors, (1046), 1036 states have call successors, (1046) [2022-11-03 03:50:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6118 states to 6118 states and 8116 transitions. [2022-11-03 03:50:21,148 INFO L78 Accepts]: Start accepts. Automaton has 6118 states and 8116 transitions. Word has length 192 [2022-11-03 03:50:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:21,149 INFO L495 AbstractCegarLoop]: Abstraction has 6118 states and 8116 transitions. [2022-11-03 03:50:21,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:50:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 6118 states and 8116 transitions. [2022-11-03 03:50:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-03 03:50:21,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:21,159 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 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] [2022-11-03 03:50:21,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:21,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:21,373 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:21,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1485455436, now seen corresponding path program 1 times [2022-11-03 03:50:21,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:21,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490091515] [2022-11-03 03:50:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:21,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:21,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:21,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:21,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:50:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:22,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:50:22,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-03 03:50:22,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:22,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:22,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490091515] [2022-11-03 03:50:22,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490091515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:22,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:22,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:50:22,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225698883] [2022-11-03 03:50:22,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:22,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:50:22,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:22,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:50:22,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:50:22,634 INFO L87 Difference]: Start difference. First operand 6118 states and 8116 transitions. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:50:24,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:24,077 INFO L93 Difference]: Finished difference Result 14826 states and 20295 transitions. [2022-11-03 03:50:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:50:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 214 [2022-11-03 03:50:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:24,109 INFO L225 Difference]: With dead ends: 14826 [2022-11-03 03:50:24,109 INFO L226 Difference]: Without dead ends: 8740 [2022-11-03 03:50:24,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:50:24,128 INFO L413 NwaCegarLoop]: 1308 mSDtfsCounter, 281 mSDsluCounter, 7469 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 8777 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:24,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 8777 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:50:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8740 states. [2022-11-03 03:50:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8740 to 6150. [2022-11-03 03:50:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6150 states, 4629 states have (on average 1.3084899546338302) internal successors, (6057), 4725 states have internal predecessors, (6057), 1037 states have call successors, (1037), 476 states have call predecessors, (1037), 483 states have return successors, (1086), 1036 states have call predecessors, (1086), 1036 states have call successors, (1086) [2022-11-03 03:50:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6150 states to 6150 states and 8180 transitions. [2022-11-03 03:50:24,829 INFO L78 Accepts]: Start accepts. Automaton has 6150 states and 8180 transitions. Word has length 214 [2022-11-03 03:50:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:24,830 INFO L495 AbstractCegarLoop]: Abstraction has 6150 states and 8180 transitions. [2022-11-03 03:50:24,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:50:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 6150 states and 8180 transitions. [2022-11-03 03:50:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-03 03:50:24,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:24,840 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 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] [2022-11-03 03:50:24,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:25,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:25,065 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:25,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1762687412, now seen corresponding path program 1 times [2022-11-03 03:50:25,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:25,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621474912] [2022-11-03 03:50:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:25,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:25,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:25,069 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:25,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:50:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:26,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:50:26,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-03 03:50:26,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:26,256 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:26,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621474912] [2022-11-03 03:50:26,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621474912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:26,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:26,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:50:26,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705424133] [2022-11-03 03:50:26,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:26,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:50:26,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:26,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:50:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:26,259 INFO L87 Difference]: Start difference. First operand 6150 states and 8180 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 03:50:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:26,985 INFO L93 Difference]: Finished difference Result 12276 states and 16328 transitions. [2022-11-03 03:50:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:50:26,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 220 [2022-11-03 03:50:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:27,010 INFO L225 Difference]: With dead ends: 12276 [2022-11-03 03:50:27,011 INFO L226 Difference]: Without dead ends: 6158 [2022-11-03 03:50:27,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:50:27,025 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 1 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1805 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:27,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1805 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6158 states. [2022-11-03 03:50:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6158 to 6154. [2022-11-03 03:50:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6154 states, 4633 states have (on average 1.3082236132095835) internal successors, (6061), 4729 states have internal predecessors, (6061), 1037 states have call successors, (1037), 476 states have call predecessors, (1037), 483 states have return successors, (1086), 1036 states have call predecessors, (1086), 1036 states have call successors, (1086) [2022-11-03 03:50:27,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 8184 transitions. [2022-11-03 03:50:27,562 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 8184 transitions. Word has length 220 [2022-11-03 03:50:27,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:27,563 INFO L495 AbstractCegarLoop]: Abstraction has 6154 states and 8184 transitions. [2022-11-03 03:50:27,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 03:50:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 8184 transitions. [2022-11-03 03:50:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 03:50:27,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:27,573 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 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] [2022-11-03 03:50:27,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:27,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:27,797 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:27,798 INFO L85 PathProgramCache]: Analyzing trace with hash 417856008, now seen corresponding path program 1 times [2022-11-03 03:50:27,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:27,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141462146] [2022-11-03 03:50:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:27,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:27,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:27,801 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:27,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:50:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:29,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:50:29,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-03 03:50:29,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-03 03:50:29,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:29,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141462146] [2022-11-03 03:50:29,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141462146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:29,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1195063343] [2022-11-03 03:50:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:29,319 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:29,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:29,326 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:29,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 03:50:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:30,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:50:30,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-11-03 03:50:30,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:30,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1195063343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:30,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:30,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 13 [2022-11-03 03:50:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075637083] [2022-11-03 03:50:30,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:30,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:50:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:50:30,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:50:30,851 INFO L87 Difference]: Start difference. First operand 6154 states and 8184 transitions. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-03 03:50:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:37,797 INFO L93 Difference]: Finished difference Result 26376 states and 37247 transitions. [2022-11-03 03:50:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 03:50:37,798 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 222 [2022-11-03 03:50:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:37,858 INFO L225 Difference]: With dead ends: 26376 [2022-11-03 03:50:37,859 INFO L226 Difference]: Without dead ends: 20254 [2022-11-03 03:50:37,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 03:50:37,875 INFO L413 NwaCegarLoop]: 2248 mSDtfsCounter, 3373 mSDsluCounter, 14256 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 16504 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:37,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 16504 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [825 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:50:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20254 states. [2022-11-03 03:50:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20254 to 6214. [2022-11-03 03:50:39,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 4681 states have (on average 1.3059175389873958) internal successors, (6113), 4777 states have internal predecessors, (6113), 1049 states have call successors, (1049), 476 states have call predecessors, (1049), 483 states have return successors, (1100), 1048 states have call predecessors, (1100), 1048 states have call successors, (1100) [2022-11-03 03:50:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 8262 transitions. [2022-11-03 03:50:39,128 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 8262 transitions. Word has length 222 [2022-11-03 03:50:39,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:39,129 INFO L495 AbstractCegarLoop]: Abstraction has 6214 states and 8262 transitions. [2022-11-03 03:50:39,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-03 03:50:39,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 8262 transitions. [2022-11-03 03:50:39,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 03:50:39,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:39,138 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 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] [2022-11-03 03:50:39,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:39,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:39,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:50:39,546 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:39,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:39,546 INFO L85 PathProgramCache]: Analyzing trace with hash -862007670, now seen corresponding path program 1 times [2022-11-03 03:50:39,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:39,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874457721] [2022-11-03 03:50:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:39,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:39,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:39,549 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:39,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:50:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:40,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:50:40,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-03 03:50:40,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-03 03:50:40,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:40,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874457721] [2022-11-03 03:50:40,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874457721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:40,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1506865880] [2022-11-03 03:50:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:40,792 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:40,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:40,797 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:40,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 03:50:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:41,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:50:41,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-11-03 03:50:41,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:41,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1506865880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:41,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:41,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 9 [2022-11-03 03:50:41,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331408674] [2022-11-03 03:50:41,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:41,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:50:41,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:41,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:50:41,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:50:41,924 INFO L87 Difference]: Start difference. First operand 6214 states and 8262 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-03 03:50:42,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:42,650 INFO L93 Difference]: Finished difference Result 12484 states and 16640 transitions. [2022-11-03 03:50:42,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:50:42,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 222 [2022-11-03 03:50:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:42,672 INFO L225 Difference]: With dead ends: 12484 [2022-11-03 03:50:42,672 INFO L226 Difference]: Without dead ends: 6302 [2022-11-03 03:50:42,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:50:42,686 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 4 mSDsluCounter, 2703 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:42,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3608 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:50:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6302 states. [2022-11-03 03:50:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6302 to 6274. [2022-11-03 03:50:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6274 states, 4725 states have (on average 1.3047619047619048) internal successors, (6165), 4821 states have internal predecessors, (6165), 1057 states have call successors, (1057), 476 states have call predecessors, (1057), 491 states have return successors, (1140), 1064 states have call predecessors, (1140), 1056 states have call successors, (1140) [2022-11-03 03:50:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 8362 transitions. [2022-11-03 03:50:43,766 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 8362 transitions. Word has length 222 [2022-11-03 03:50:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:43,767 INFO L495 AbstractCegarLoop]: Abstraction has 6274 states and 8362 transitions. [2022-11-03 03:50:43,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-03 03:50:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 8362 transitions. [2022-11-03 03:50:43,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-03 03:50:43,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:43,776 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 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] [2022-11-03 03:50:43,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:44,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:44,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:44,189 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:44,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1157838386, now seen corresponding path program 1 times [2022-11-03 03:50:44,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:50:44,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941493990] [2022-11-03 03:50:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:44,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:50:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:50:44,193 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:50:44,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:50:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:45,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:50:45,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-03 03:50:45,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-11-03 03:50:45,621 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:45,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941493990] [2022-11-03 03:50:45,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941493990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1782295470] [2022-11-03 03:50:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:45,622 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:45,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:45,624 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:45,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 03:50:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:46,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:50:46,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-11-03 03:50:47,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:47,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1782295470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:47,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:47,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4] total 11 [2022-11-03 03:50:47,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836127520] [2022-11-03 03:50:47,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:47,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:50:47,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:50:47,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:50:47,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:50:47,233 INFO L87 Difference]: Start difference. First operand 6274 states and 8362 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 03:50:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:57,737 INFO L93 Difference]: Finished difference Result 20392 states and 28755 transitions. [2022-11-03 03:50:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:50:57,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 228 [2022-11-03 03:50:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:57,790 INFO L225 Difference]: With dead ends: 20392 [2022-11-03 03:50:57,790 INFO L226 Difference]: Without dead ends: 14150 [2022-11-03 03:50:57,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:50:57,807 INFO L413 NwaCegarLoop]: 1848 mSDtfsCounter, 3045 mSDsluCounter, 9400 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3175 SdHoareTripleChecker+Valid, 11248 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:57,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3175 Valid, 11248 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 03:50:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14150 states. [2022-11-03 03:50:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14150 to 6274. [2022-11-03 03:50:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6274 states, 4725 states have (on average 1.3043386243386244) internal successors, (6163), 4821 states have internal predecessors, (6163), 1057 states have call successors, (1057), 476 states have call predecessors, (1057), 491 states have return successors, (1140), 1064 states have call predecessors, (1140), 1056 states have call successors, (1140) [2022-11-03 03:50:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 8360 transitions. [2022-11-03 03:50:59,561 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 8360 transitions. Word has length 228 [2022-11-03 03:50:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:59,562 INFO L495 AbstractCegarLoop]: Abstraction has 6274 states and 8360 transitions. [2022-11-03 03:50:59,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 03:50:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 8360 transitions. [2022-11-03 03:50:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 03:50:59,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:59,575 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:59,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:59,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:00,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:00,011 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:00,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:00,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1001475394, now seen corresponding path program 1 times [2022-11-03 03:51:00,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:00,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278779201] [2022-11-03 03:51:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:00,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:00,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:00,013 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:00,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:51:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:01,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:51:01,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-03 03:51:01,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-11-03 03:51:01,360 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:01,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278779201] [2022-11-03 03:51:01,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278779201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:01,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [396423642] [2022-11-03 03:51:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:01,361 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:01,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:01,362 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:01,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 03:51:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:02,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:51:02,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 88 proven. 23 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-11-03 03:51:02,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-11-03 03:51:03,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [396423642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:03,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8608188] [2022-11-03 03:51:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:03,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:03,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:03,481 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:03,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 03:51:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:04,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:51:04,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 88 proven. 23 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-11-03 03:51:04,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-11-03 03:51:05,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8608188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:05,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:51:05,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-03 03:51:05,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721291020] [2022-11-03 03:51:05,483 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:05,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:51:05,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:05,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:51:05,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:51:05,495 INFO L87 Difference]: Start difference. First operand 6274 states and 8360 transitions. Second operand has 10 states, 10 states have (on average 36.6) internal successors, (366), 10 states have internal predecessors, (366), 6 states have call successors, (68), 4 states have call predecessors, (68), 4 states have return successors, (67), 6 states have call predecessors, (67), 6 states have call successors, (67) [2022-11-03 03:51:20,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:20,636 INFO L93 Difference]: Finished difference Result 43855 states and 58457 transitions. [2022-11-03 03:51:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 03:51:20,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 36.6) internal successors, (366), 10 states have internal predecessors, (366), 6 states have call successors, (68), 4 states have call predecessors, (68), 4 states have return successors, (67), 6 states have call predecessors, (67), 6 states have call successors, (67) Word has length 248 [2022-11-03 03:51:20,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:20,752 INFO L225 Difference]: With dead ends: 43855 [2022-11-03 03:51:20,752 INFO L226 Difference]: Without dead ends: 37613 [2022-11-03 03:51:20,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1505 GetRequests, 1475 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2022-11-03 03:51:20,775 INFO L413 NwaCegarLoop]: 2225 mSDtfsCounter, 5725 mSDsluCounter, 12738 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 1029 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5725 SdHoareTripleChecker+Valid, 14963 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1029 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:20,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5725 Valid, 14963 Invalid, 2867 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1029 Valid, 1838 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-03 03:51:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37613 states. [2022-11-03 03:51:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37613 to 37540. [2022-11-03 03:51:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37540 states, 28321 states have (on average 1.3040499982345257) internal successors, (36932), 28929 states have internal predecessors, (36932), 6277 states have call successors, (6277), 2846 states have call predecessors, (6277), 2941 states have return successors, (6780), 6292 states have call predecessors, (6780), 6276 states have call successors, (6780) [2022-11-03 03:51:29,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37540 states to 37540 states and 49989 transitions. [2022-11-03 03:51:29,340 INFO L78 Accepts]: Start accepts. Automaton has 37540 states and 49989 transitions. Word has length 248 [2022-11-03 03:51:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:29,341 INFO L495 AbstractCegarLoop]: Abstraction has 37540 states and 49989 transitions. [2022-11-03 03:51:29,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 36.6) internal successors, (366), 10 states have internal predecessors, (366), 6 states have call successors, (68), 4 states have call predecessors, (68), 4 states have return successors, (67), 6 states have call predecessors, (67), 6 states have call successors, (67) [2022-11-03 03:51:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 37540 states and 49989 transitions. [2022-11-03 03:51:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-03 03:51:29,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:29,387 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 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, 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] [2022-11-03 03:51:29,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:29,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:29,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-11-03 03:51:30,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:30,002 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:30,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2093579766, now seen corresponding path program 1 times [2022-11-03 03:51:30,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:30,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251603813] [2022-11-03 03:51:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:30,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:30,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:30,006 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:30,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:51:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:31,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:51:31,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 90 proven. 16 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-03 03:51:31,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2022-11-03 03:51:31,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:31,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251603813] [2022-11-03 03:51:31,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251603813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:31,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [984643010] [2022-11-03 03:51:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:31,668 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:31,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:31,675 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:31,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 03:51:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:32,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:51:32,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-03 03:51:33,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:33,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [984643010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:33,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:33,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7] total 13 [2022-11-03 03:51:33,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182142168] [2022-11-03 03:51:33,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:33,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:33,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:33,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:51:33,409 INFO L87 Difference]: Start difference. First operand 37540 states and 49989 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-03 03:51:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:37,028 INFO L93 Difference]: Finished difference Result 57284 states and 76307 transitions. [2022-11-03 03:51:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:37,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 264 [2022-11-03 03:51:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:37,071 INFO L225 Difference]: With dead ends: 57284 [2022-11-03 03:51:37,071 INFO L226 Difference]: Without dead ends: 18524 [2022-11-03 03:51:37,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 778 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:51:37,125 INFO L413 NwaCegarLoop]: 1165 mSDtfsCounter, 722 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:37,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1488 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:51:37,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18524 states. [2022-11-03 03:51:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18524 to 18524. [2022-11-03 03:51:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18524 states, 13960 states have (on average 1.3013610315186246) internal successors, (18167), 14264 states have internal predecessors, (18167), 3109 states have call successors, (3109), 1407 states have call predecessors, (3109), 1454 states have return successors, (3360), 3116 states have call predecessors, (3360), 3108 states have call successors, (3360) [2022-11-03 03:51:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18524 states to 18524 states and 24636 transitions. [2022-11-03 03:51:41,312 INFO L78 Accepts]: Start accepts. Automaton has 18524 states and 24636 transitions. Word has length 264 [2022-11-03 03:51:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:41,313 INFO L495 AbstractCegarLoop]: Abstraction has 18524 states and 24636 transitions. [2022-11-03 03:51:41,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-03 03:51:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 18524 states and 24636 transitions. [2022-11-03 03:51:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-03 03:51:41,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:41,329 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:51:41,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:41,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-11-03 03:51:41,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:41,731 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:41,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1616578642, now seen corresponding path program 1 times [2022-11-03 03:51:41,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:41,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911233736] [2022-11-03 03:51:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:41,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:41,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:41,733 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:41,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:51:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:42,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:51:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 52 proven. 16 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-11-03 03:51:42,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-03 03:51:43,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:43,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911233736] [2022-11-03 03:51:43,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911233736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:43,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [218904435] [2022-11-03 03:51:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:43,262 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:43,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:43,263 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:43,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-03 03:51:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:44,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:51:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-11-03 03:51:46,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:46,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [218904435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:46,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:46,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 7] total 21 [2022-11-03 03:51:46,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683000774] [2022-11-03 03:51:46,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:46,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:51:46,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:51:46,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:51:46,004 INFO L87 Difference]: Start difference. First operand 18524 states and 24636 transitions. Second operand has 11 states, 10 states have (on average 14.4) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-03 03:52:01,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:02,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:05,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:07,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:09,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:15,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:18,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:19,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:21,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:23,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:25,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:33,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:35,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:37,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:39,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:41,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:43,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:45,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:47,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:53,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:55,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:56,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:57,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:58,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:00,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:01,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:02,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:09,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:11,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:12,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:14,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:19,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:21,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:23,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:25,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:26,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:33,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:35,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:37,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:39,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:41,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:43,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:48,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:49,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:52,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:53,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:54:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:05,352 INFO L93 Difference]: Finished difference Result 52418 states and 71723 transitions. [2022-11-03 03:54:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:54:05,353 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 14.4) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 268 [2022-11-03 03:54:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:05,479 INFO L225 Difference]: With dead ends: 52418 [2022-11-03 03:54:05,479 INFO L226 Difference]: Without dead ends: 33310 [2022-11-03 03:54:05,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 787 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 03:54:05,529 INFO L413 NwaCegarLoop]: 1479 mSDtfsCounter, 3599 mSDsluCounter, 4044 mSDsCounter, 0 mSdLazyCounter, 8237 mSolverCounterSat, 1230 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3712 SdHoareTripleChecker+Valid, 5523 SdHoareTripleChecker+Invalid, 9489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1230 IncrementalHoareTripleChecker+Valid, 8237 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:05,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3712 Valid, 5523 Invalid, 9489 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1230 Valid, 8237 Invalid, 22 Unknown, 0 Unchecked, 129.3s Time] [2022-11-03 03:54:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33310 states. [2022-11-03 03:54:11,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33310 to 23776. [2022-11-03 03:54:11,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23776 states, 17916 states have (on average 1.2974436258093325) internal successors, (23245), 18298 states have internal predecessors, (23245), 3991 states have call successors, (3991), 1797 states have call predecessors, (3991), 1868 states have return successors, (4308), 4016 states have call predecessors, (4308), 3990 states have call successors, (4308) [2022-11-03 03:54:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23776 states to 23776 states and 31544 transitions. [2022-11-03 03:54:11,142 INFO L78 Accepts]: Start accepts. Automaton has 23776 states and 31544 transitions. Word has length 268 [2022-11-03 03:54:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:11,143 INFO L495 AbstractCegarLoop]: Abstraction has 23776 states and 31544 transitions. [2022-11-03 03:54:11,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 14.4) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-03 03:54:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 23776 states and 31544 transitions. [2022-11-03 03:54:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-03 03:54:11,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:11,161 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:11,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:11,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:11,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:11,577 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:11,578 INFO L85 PathProgramCache]: Analyzing trace with hash -990715723, now seen corresponding path program 1 times [2022-11-03 03:54:11,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:11,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862398262] [2022-11-03 03:54:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:11,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:11,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:11,581 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:11,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:54:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:12,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:54:12,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 74 proven. 16 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-11-03 03:54:13,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 61 proven. 16 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-11-03 03:54:13,357 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862398262] [2022-11-03 03:54:13,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862398262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [852582414] [2022-11-03 03:54:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:13,358 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:13,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:13,359 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:13,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f777696-40b8-4bd4-a530-3e9a53933c61/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 03:54:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:14,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:54:14,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-11-03 03:54:15,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:54:15,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [852582414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:15,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:54:15,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 17 [2022-11-03 03:54:15,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417817823] [2022-11-03 03:54:15,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:15,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:54:15,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:15,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:54:15,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:54:15,073 INFO L87 Difference]: Start difference. First operand 23776 states and 31544 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 4 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28)