./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--usb--ipheth.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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/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_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/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--usb--ipheth.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/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_d8340822-154c-4e54-aefa-e7623837fe2d/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 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 --- 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 01:39:39,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:39:39,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:39:39,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:39:39,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:39:39,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:39:39,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:39:39,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:39:39,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:39:39,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:39:39,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:39:39,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:39:39,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:39:39,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:39:39,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:39:39,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:39:39,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:39:39,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:39:39,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:39:39,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:39:39,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:39:39,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:39:40,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:39:40,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:39:40,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:39:40,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:39:40,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:39:40,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:39:40,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:39:40,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:39:40,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:39:40,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:39:40,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:39:40,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:39:40,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:39:40,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:39:40,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:39:40,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:39:40,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:39:40,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:39:40,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:39:40,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:39:40,083 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:39:40,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:39:40,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:39:40,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:39:40,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:39:40,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:39:40,085 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:39:40,085 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:39:40,085 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:39:40,085 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:39:40,085 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:39:40,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:39:40,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:39:40,086 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:39:40,086 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:39:40,086 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:39:40,087 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:39:40,087 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:39:40,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:39:40,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:39:40,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:39:40,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:39:40,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:39:40,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:39:40,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:39:40,089 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:39:40,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:39:40,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:39:40,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:39:40,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:40,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:39:40,090 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:39:40,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:39:40,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:39:40,091 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:39:40,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:39:40,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:39:40,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:39:40,091 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_d8340822-154c-4e54-aefa-e7623837fe2d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 [2022-11-03 01:39:40,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:39:40,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:39:40,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:39:40,392 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:39:40,393 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:39:40,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2022-11-03 01:39:40,497 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/data/8f3602e95/757bc35b62ae4857af60565714c71456/FLAG1348a36e4 [2022-11-03 01:39:41,500 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:39:41,500 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2022-11-03 01:39:41,558 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/data/8f3602e95/757bc35b62ae4857af60565714c71456/FLAG1348a36e4 [2022-11-03 01:39:41,925 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/data/8f3602e95/757bc35b62ae4857af60565714c71456 [2022-11-03 01:39:41,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:39:41,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:39:41,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:41,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:39:41,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:39:41,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:41" (1/1) ... [2022-11-03 01:39:41,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128d91a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:41, skipping insertion in model container [2022-11-03 01:39:41,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:39:41" (1/1) ... [2022-11-03 01:39:41,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:39:42,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:39:43,120 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_d8340822-154c-4e54-aefa-e7623837fe2d/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2022-11-03 01:39:43,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:43,667 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:39:43,871 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_d8340822-154c-4e54-aefa-e7623837fe2d/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2022-11-03 01:39:44,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:39:44,147 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:39:44,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44 WrapperNode [2022-11-03 01:39:44,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:39:44,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:44,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:39:44,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:39:44,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (1/1) ... [2022-11-03 01:39:44,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (1/1) ... [2022-11-03 01:39:44,315 INFO L138 Inliner]: procedures = 165, calls = 691, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 1770 [2022-11-03 01:39:44,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:39:44,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:39:44,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:39:44,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:39:44,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (1/1) ... [2022-11-03 01:39:44,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (1/1) ... [2022-11-03 01:39:44,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (1/1) ... [2022-11-03 01:39:44,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (1/1) ... [2022-11-03 01:39:44,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (1/1) ... [2022-11-03 01:39:44,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (1/1) ... [2022-11-03 01:39:44,479 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (1/1) ... [2022-11-03 01:39:44,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (1/1) ... [2022-11-03 01:39:44,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:39:44,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:39:44,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:39:44,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:39:44,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (1/1) ... [2022-11-03 01:39:44,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:39:44,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:44,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:39:44,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:39:44,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_12 [2022-11-03 01:39:44,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_12 [2022-11-03 01:39:44,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 01:39:44,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_8 [2022-11-03 01:39:44,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_8 [2022-11-03 01:39:44,656 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rx_submit [2022-11-03 01:39:44,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rx_submit [2022-11-03 01:39:44,656 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_9 [2022-11-03 01:39:44,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_9 [2022-11-03 01:39:44,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 01:39:44,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 01:39:44,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 01:39:44,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 01:39:44,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:39:44,658 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-03 01:39:44,658 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-03 01:39:44,658 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2022-11-03 01:39:44,658 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2022-11-03 01:39:44,658 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rcvbulk_callback [2022-11-03 01:39:44,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rcvbulk_callback [2022-11-03 01:39:44,659 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-03 01:39:44,659 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-03 01:39:44,659 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-03 01:39:44,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-03 01:39:44,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 01:39:44,660 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 01:39:44,660 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 01:39:44,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 01:39:44,660 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 01:39:44,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 01:39:44,661 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-03 01:39:44,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-03 01:39:44,662 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 01:39:44,662 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 01:39:44,662 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 01:39:44,662 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 01:39:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_disconnect [2022-11-03 01:39:44,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_disconnect [2022-11-03 01:39:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_tx_timeout [2022-11-03 01:39:44,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_tx_timeout [2022-11-03 01:39:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:39:44,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 01:39:44,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 01:39:44,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 01:39:44,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 01:39:44,665 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:39:44,665 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:39:44,666 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_carrier_set [2022-11-03 01:39:44,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_carrier_set [2022-11-03 01:39:44,668 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-03 01:39:44,668 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-03 01:39:44,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:39:44,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-03 01:39:44,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-03 01:39:44,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:39:44,670 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 01:39:44,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 01:39:44,671 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_free_urbs [2022-11-03 01:39:44,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_free_urbs [2022-11-03 01:39:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:39:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:39:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 01:39:44,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 01:39:44,672 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-03 01:39:44,673 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-03 01:39:44,673 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-03 01:39:44,673 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-03 01:39:44,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:39:44,673 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-03 01:39:44,674 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-03 01:39:44,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:39:44,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:39:44,675 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2022-11-03 01:39:44,675 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2022-11-03 01:39:44,675 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 01:39:44,676 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 01:39:44,676 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 01:39:44,676 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 01:39:44,676 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-03 01:39:44,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-03 01:39:44,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:39:44,677 INFO L130 BoogieDeclarations]: Found specification of procedure round_jiffies_relative [2022-11-03 01:39:44,678 INFO L138 BoogieDeclarations]: Found implementation of procedure round_jiffies_relative [2022-11-03 01:39:44,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 01:39:44,678 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 01:39:44,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 01:39:44,679 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2022-11-03 01:39:44,679 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2022-11-03 01:39:44,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:39:44,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:39:45,259 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:39:45,262 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:39:45,580 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 01:39:46,190 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-03 01:39:47,061 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:39:47,463 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:39:47,464 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:39:47,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:39:47 BoogieIcfgContainer [2022-11-03 01:39:47,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:39:47,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:39:47,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:39:47,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:39:47,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:39:41" (1/3) ... [2022-11-03 01:39:47,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8c0a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:39:47, skipping insertion in model container [2022-11-03 01:39:47,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:39:44" (2/3) ... [2022-11-03 01:39:47,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8c0a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:39:47, skipping insertion in model container [2022-11-03 01:39:47,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:39:47" (3/3) ... [2022-11-03 01:39:47,480 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2022-11-03 01:39:47,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:39:47,500 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:39:47,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:39:47,601 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;@bea1c54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:39:47,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:39:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 387 states, 246 states have (on average 1.3658536585365855) internal successors, (336), 265 states have internal predecessors, (336), 104 states have call successors, (104), 37 states have call predecessors, (104), 35 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-03 01:39:47,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 01:39:47,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:47,621 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:39:47,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:47,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:47,629 INFO L85 PathProgramCache]: Analyzing trace with hash -455207270, now seen corresponding path program 1 times [2022-11-03 01:39:47,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:47,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587420197] [2022-11-03 01:39:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:47,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:39:48,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:48,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587420197] [2022-11-03 01:39:48,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587420197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:48,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:48,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:39:48,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309733672] [2022-11-03 01:39:48,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:48,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:39:48,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:48,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:39:48,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:39:48,330 INFO L87 Difference]: Start difference. First operand has 387 states, 246 states have (on average 1.3658536585365855) internal successors, (336), 265 states have internal predecessors, (336), 104 states have call successors, (104), 37 states have call predecessors, (104), 35 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:39:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:49,075 INFO L93 Difference]: Finished difference Result 1127 states and 1562 transitions. [2022-11-03 01:39:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:39:49,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-03 01:39:49,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:49,100 INFO L225 Difference]: With dead ends: 1127 [2022-11-03 01:39:49,101 INFO L226 Difference]: Without dead ends: 727 [2022-11-03 01:39:49,108 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 01:39:49,111 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 491 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:49,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 986 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:39:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-11-03 01:39:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 727. [2022-11-03 01:39:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 473 states have (on average 1.3213530655391121) internal successors, (625), 489 states have internal predecessors, (625), 185 states have call successors, (185), 69 states have call predecessors, (185), 68 states have return successors, (180), 174 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-03 01:39:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 990 transitions. [2022-11-03 01:39:49,307 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 990 transitions. Word has length 29 [2022-11-03 01:39:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:49,308 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 990 transitions. [2022-11-03 01:39:49,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:39:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 990 transitions. [2022-11-03 01:39:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 01:39:49,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:49,319 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 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 01:39:49,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:39:49,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:49,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2027945501, now seen corresponding path program 1 times [2022-11-03 01:39:49,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:49,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297391791] [2022-11-03 01:39:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:49,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:39:49,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:49,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297391791] [2022-11-03 01:39:49,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297391791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:49,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:49,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:39:49,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933511646] [2022-11-03 01:39:49,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:49,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:39:49,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:39:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:39:49,892 INFO L87 Difference]: Start difference. First operand 727 states and 990 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:50,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:50,429 INFO L93 Difference]: Finished difference Result 1383 states and 1877 transitions. [2022-11-03 01:39:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:39:50,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-11-03 01:39:50,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:50,441 INFO L225 Difference]: With dead ends: 1383 [2022-11-03 01:39:50,441 INFO L226 Difference]: Without dead ends: 1380 [2022-11-03 01:39:50,442 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 01:39:50,444 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 442 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:50,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 933 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:39:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-11-03 01:39:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1368. [2022-11-03 01:39:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 893 states have (on average 1.322508398656215) internal successors, (1181), 921 states have internal predecessors, (1181), 342 states have call successors, (342), 135 states have call predecessors, (342), 132 states have return successors, (337), 321 states have call predecessors, (337), 337 states have call successors, (337) [2022-11-03 01:39:50,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1860 transitions. [2022-11-03 01:39:50,538 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1860 transitions. Word has length 37 [2022-11-03 01:39:50,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:50,538 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 1860 transitions. [2022-11-03 01:39:50,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1860 transitions. [2022-11-03 01:39:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 01:39:50,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:50,542 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 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 01:39:50,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:39:50,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:50,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1558445890, now seen corresponding path program 1 times [2022-11-03 01:39:50,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:50,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94666303] [2022-11-03 01:39:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:50,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:39:51,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:51,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94666303] [2022-11-03 01:39:51,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94666303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:51,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:51,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:39:51,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117385789] [2022-11-03 01:39:51,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:51,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:39:51,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:51,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:39:51,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:39:51,145 INFO L87 Difference]: Start difference. First operand 1368 states and 1860 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:51,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:51,449 INFO L93 Difference]: Finished difference Result 1370 states and 1861 transitions. [2022-11-03 01:39:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:39:51,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2022-11-03 01:39:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:51,460 INFO L225 Difference]: With dead ends: 1370 [2022-11-03 01:39:51,460 INFO L226 Difference]: Without dead ends: 1367 [2022-11-03 01:39:51,462 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 01:39:51,468 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 491 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:51,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 431 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:39:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2022-11-03 01:39:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1367. [2022-11-03 01:39:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 893 states have (on average 1.3213885778275476) internal successors, (1180), 920 states have internal predecessors, (1180), 341 states have call successors, (341), 135 states have call predecessors, (341), 132 states have return successors, (337), 321 states have call predecessors, (337), 337 states have call successors, (337) [2022-11-03 01:39:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1858 transitions. [2022-11-03 01:39:51,601 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1858 transitions. Word has length 38 [2022-11-03 01:39:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:51,601 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 1858 transitions. [2022-11-03 01:39:51,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1858 transitions. [2022-11-03 01:39:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 01:39:51,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:51,609 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 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 01:39:51,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:39:51,609 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1067424448, now seen corresponding path program 1 times [2022-11-03 01:39:51,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:51,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495963298] [2022-11-03 01:39:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:51,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:39:51,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:51,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495963298] [2022-11-03 01:39:51,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495963298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:51,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:51,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:39:51,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180291597] [2022-11-03 01:39:51,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:51,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:39:51,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:51,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:39:51,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:39:51,781 INFO L87 Difference]: Start difference. First operand 1367 states and 1858 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:52,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:52,145 INFO L93 Difference]: Finished difference Result 1369 states and 1859 transitions. [2022-11-03 01:39:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:39:52,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-11-03 01:39:52,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:52,154 INFO L225 Difference]: With dead ends: 1369 [2022-11-03 01:39:52,154 INFO L226 Difference]: Without dead ends: 1366 [2022-11-03 01:39:52,155 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 01:39:52,158 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 488 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:52,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 429 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:39:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2022-11-03 01:39:52,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1366. [2022-11-03 01:39:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 893 states have (on average 1.3202687569988802) internal successors, (1179), 919 states have internal predecessors, (1179), 340 states have call successors, (340), 135 states have call predecessors, (340), 132 states have return successors, (337), 321 states have call predecessors, (337), 337 states have call successors, (337) [2022-11-03 01:39:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1856 transitions. [2022-11-03 01:39:52,297 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1856 transitions. Word has length 39 [2022-11-03 01:39:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:52,300 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 1856 transitions. [2022-11-03 01:39:52,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1856 transitions. [2022-11-03 01:39:52,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 01:39:52,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:52,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 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 01:39:52,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:39:52,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:52,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:52,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1269343233, now seen corresponding path program 1 times [2022-11-03 01:39:52,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:52,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481996566] [2022-11-03 01:39:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:52,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:39:52,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:52,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481996566] [2022-11-03 01:39:52,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481996566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:52,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:52,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:39:52,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014602024] [2022-11-03 01:39:52,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:52,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:39:52,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:52,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:39:52,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:39:52,513 INFO L87 Difference]: Start difference. First operand 1366 states and 1856 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:52,916 INFO L93 Difference]: Finished difference Result 1368 states and 1857 transitions. [2022-11-03 01:39:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:39:52,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-11-03 01:39:52,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:52,927 INFO L225 Difference]: With dead ends: 1368 [2022-11-03 01:39:52,928 INFO L226 Difference]: Without dead ends: 1365 [2022-11-03 01:39:52,929 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 01:39:52,930 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 485 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:52,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 427 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:39:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2022-11-03 01:39:53,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1365. [2022-11-03 01:39:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 893 states have (on average 1.3191489361702127) internal successors, (1178), 918 states have internal predecessors, (1178), 339 states have call successors, (339), 135 states have call predecessors, (339), 132 states have return successors, (337), 321 states have call predecessors, (337), 337 states have call successors, (337) [2022-11-03 01:39:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1854 transitions. [2022-11-03 01:39:53,144 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1854 transitions. Word has length 40 [2022-11-03 01:39:53,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:53,145 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 1854 transitions. [2022-11-03 01:39:53,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1854 transitions. [2022-11-03 01:39:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 01:39:53,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:53,147 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 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 01:39:53,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:39:53,148 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:53,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:53,149 INFO L85 PathProgramCache]: Analyzing trace with hash 694702179, now seen corresponding path program 1 times [2022-11-03 01:39:53,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:53,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061636273] [2022-11-03 01:39:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:53,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:39:53,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:53,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061636273] [2022-11-03 01:39:53,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061636273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:53,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:53,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:39:53,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098816852] [2022-11-03 01:39:53,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:53,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:39:53,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:53,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:39:53,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:39:53,298 INFO L87 Difference]: Start difference. First operand 1365 states and 1854 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:53,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:53,765 INFO L93 Difference]: Finished difference Result 1367 states and 1855 transitions. [2022-11-03 01:39:53,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:39:53,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-03 01:39:53,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:53,774 INFO L225 Difference]: With dead ends: 1367 [2022-11-03 01:39:53,775 INFO L226 Difference]: Without dead ends: 1358 [2022-11-03 01:39:53,779 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 01:39:53,780 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 482 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:53,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 426 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:39:53,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-11-03 01:39:53,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1358. [2022-11-03 01:39:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 887 states have (on average 1.3179255918827508) internal successors, (1169), 911 states have internal predecessors, (1169), 338 states have call successors, (338), 135 states have call predecessors, (338), 132 states have return successors, (337), 321 states have call predecessors, (337), 337 states have call successors, (337) [2022-11-03 01:39:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1844 transitions. [2022-11-03 01:39:53,950 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1844 transitions. Word has length 41 [2022-11-03 01:39:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:53,952 INFO L495 AbstractCegarLoop]: Abstraction has 1358 states and 1844 transitions. [2022-11-03 01:39:53,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:39:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1844 transitions. [2022-11-03 01:39:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 01:39:53,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:53,963 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 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] [2022-11-03 01:39:53,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:39:53,963 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1287329964, now seen corresponding path program 1 times [2022-11-03 01:39:53,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:53,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542442175] [2022-11-03 01:39:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:53,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-03 01:39:54,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:54,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542442175] [2022-11-03 01:39:54,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542442175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:54,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:54,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:39:54,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152862643] [2022-11-03 01:39:54,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:54,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:39:54,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:54,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:39:54,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:39:54,268 INFO L87 Difference]: Start difference. First operand 1358 states and 1844 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:39:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:54,858 INFO L93 Difference]: Finished difference Result 2801 states and 3775 transitions. [2022-11-03 01:39:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:39:54,859 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), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 121 [2022-11-03 01:39:54,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:54,868 INFO L225 Difference]: With dead ends: 2801 [2022-11-03 01:39:54,869 INFO L226 Difference]: Without dead ends: 1456 [2022-11-03 01:39:54,875 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 01:39:54,876 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 346 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:54,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 915 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:39:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2022-11-03 01:39:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1451. [2022-11-03 01:39:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 936 states have (on average 1.3183760683760684) internal successors, (1234), 963 states have internal predecessors, (1234), 354 states have call successors, (354), 162 states have call predecessors, (354), 160 states have return successors, (353), 336 states have call predecessors, (353), 353 states have call successors, (353) [2022-11-03 01:39:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1941 transitions. [2022-11-03 01:39:55,053 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1941 transitions. Word has length 121 [2022-11-03 01:39:55,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:55,053 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 1941 transitions. [2022-11-03 01:39:55,054 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), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:39:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1941 transitions. [2022-11-03 01:39:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 01:39:55,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:55,059 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 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 01:39:55,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:39:55,060 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1434465524, now seen corresponding path program 1 times [2022-11-03 01:39:55,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:55,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079255350] [2022-11-03 01:39:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:55,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-03 01:39:55,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:55,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079255350] [2022-11-03 01:39:55,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079255350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:55,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:39:55,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:39:55,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571122630] [2022-11-03 01:39:55,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:55,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:39:55,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:39:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:39:55,465 INFO L87 Difference]: Start difference. First operand 1451 states and 1941 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:39:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:39:56,400 INFO L93 Difference]: Finished difference Result 3314 states and 4743 transitions. [2022-11-03 01:39:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:39:56,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 127 [2022-11-03 01:39:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:39:56,417 INFO L225 Difference]: With dead ends: 3314 [2022-11-03 01:39:56,417 INFO L226 Difference]: Without dead ends: 2682 [2022-11-03 01:39:56,421 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 01:39:56,421 INFO L413 NwaCegarLoop]: 792 mSDtfsCounter, 381 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:39:56,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 2016 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:39:56,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2022-11-03 01:39:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1455. [2022-11-03 01:39:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 940 states have (on average 1.3170212765957447) internal successors, (1238), 967 states have internal predecessors, (1238), 354 states have call successors, (354), 162 states have call predecessors, (354), 160 states have return successors, (353), 336 states have call predecessors, (353), 353 states have call successors, (353) [2022-11-03 01:39:56,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 1945 transitions. [2022-11-03 01:39:56,627 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 1945 transitions. Word has length 127 [2022-11-03 01:39:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:39:56,627 INFO L495 AbstractCegarLoop]: Abstraction has 1455 states and 1945 transitions. [2022-11-03 01:39:56,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:39:56,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 1945 transitions. [2022-11-03 01:39:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 01:39:56,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:39:56,633 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 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 01:39:56,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:39:56,634 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:39:56,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:39:56,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1984295344, now seen corresponding path program 1 times [2022-11-03 01:39:56,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:39:56,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648954191] [2022-11-03 01:39:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:56,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:39:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 01:39:57,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:39:57,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648954191] [2022-11-03 01:39:57,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648954191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:39:57,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800640649] [2022-11-03 01:39:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:39:57,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:39:57,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:39:57,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:39:57,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:39:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:39:58,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 2105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:39:58,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:39:58,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:39:58,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:39:59,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:39:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:39:59,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:39:59,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800640649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:39:59,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:39:59,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 12 [2022-11-03 01:39:59,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732391189] [2022-11-03 01:39:59,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:39:59,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:39:59,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:39:59,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:39:59,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:39:59,042 INFO L87 Difference]: Start difference. First operand 1455 states and 1945 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 2 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:40:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:40:02,419 INFO L93 Difference]: Finished difference Result 3325 states and 4522 transitions. [2022-11-03 01:40:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:40:02,420 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 2 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 136 [2022-11-03 01:40:02,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:40:02,433 INFO L225 Difference]: With dead ends: 3325 [2022-11-03 01:40:02,433 INFO L226 Difference]: Without dead ends: 2132 [2022-11-03 01:40:02,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:40:02,439 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 367 mSDsluCounter, 1938 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:40:02,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2325 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 01:40:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-11-03 01:40:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1869. [2022-11-03 01:40:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1223 states have (on average 1.3295175797219951) internal successors, (1626), 1260 states have internal predecessors, (1626), 437 states have call successors, (437), 207 states have call predecessors, (437), 208 states have return successors, (456), 412 states have call predecessors, (456), 436 states have call successors, (456) [2022-11-03 01:40:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2519 transitions. [2022-11-03 01:40:02,698 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2519 transitions. Word has length 136 [2022-11-03 01:40:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:40:02,699 INFO L495 AbstractCegarLoop]: Abstraction has 1869 states and 2519 transitions. [2022-11-03 01:40:02,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 2 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:40:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2519 transitions. [2022-11-03 01:40:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 01:40:02,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:02,706 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 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] [2022-11-03 01:40:02,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:40:02,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:02,933 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:02,934 INFO L85 PathProgramCache]: Analyzing trace with hash 730068580, now seen corresponding path program 1 times [2022-11-03 01:40:02,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:02,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897325959] [2022-11-03 01:40:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:02,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 01:40:03,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:40:03,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897325959] [2022-11-03 01:40:03,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897325959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:03,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782014005] [2022-11-03 01:40:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:03,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:40:03,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:03,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:40:03,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:40:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:40:04,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2146 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 01:40:04,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:40:04,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:40:04,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:04,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:40:05,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:05,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 01:40:05,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:40:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 33 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:40:05,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:40:05,249 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_15| Int) (v_ArrVal_604 (Array Int Int))) (or (< 0 (select (select (store |c_#memory_int| |v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_15| v_ArrVal_604) 26) 0)) (< |c_ULTIMATE.start_alloc_etherdev_mqs_#t~ret347#1.base| |v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_15|))) is different from false [2022-11-03 01:40:05,275 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_15| Int) (v_ArrVal_604 (Array Int Int))) (or (< 0 (select (select (store |c_#memory_int| |v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_15| v_ArrVal_604) 26) 0)) (< 0 |v_ULTIMATE.start_ipheth_probe_~netdev~0#1.base_15|))) is different from false [2022-11-03 01:40:05,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782014005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:40:05,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1906318214] [2022-11-03 01:40:05,300 INFO L159 IcfgInterpreter]: Started Sifa with 106 locations of interest [2022-11-03 01:40:05,301 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:40:05,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:40:05,311 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:40:05,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:40:09,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 01:40:09,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:40:09,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:40:11,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:11,671 INFO L244 Elim1Store]: Index analysis took 495 ms [2022-11-03 01:40:11,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 163 select indices, 163 select index equivalence classes, 8476 disjoint index pairs (out of 13203 index pairs), introduced 163 new quantified variables, introduced 0 case distinctions, treesize of input 1422 treesize of output 490 [2022-11-03 01:40:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:14,958 INFO L244 Elim1Store]: Index analysis took 361 ms [2022-11-03 01:40:15,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 163 select indices, 163 select index equivalence classes, 8476 disjoint index pairs (out of 13203 index pairs), introduced 163 new quantified variables, introduced 0 case distinctions, treesize of input 1422 treesize of output 490 [2022-11-03 01:40:23,092 INFO L356 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-03 01:40:23,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 37 [2022-11-03 01:40:23,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 01:40:23,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:23,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:23,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:23,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:26,535 INFO L356 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-11-03 01:40:26,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 01:40:26,653 INFO L356 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-03 01:40:26,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 37 [2022-11-03 01:40:26,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:26,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:27,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:27,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:28,214 INFO L356 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-11-03 01:40:28,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 16 [2022-11-03 01:40:28,299 INFO L356 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-03 01:40:28,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 37 [2022-11-03 01:40:28,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:28,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:28,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:28,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 01:40:30,843 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 1536 for LOIs [2022-11-03 01:40:36,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 01:40:38,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:40:38,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:40:45,149 INFO L356 Elim1Store]: treesize reduction 390, result has 47.4 percent of original size [2022-11-03 01:40:45,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 39 select indices, 39 select index equivalence classes, 742 disjoint index pairs (out of 741 index pairs), introduced 40 new quantified variables, introduced 39 case distinctions, treesize of input 3744 treesize of output 4020 [2022-11-03 01:40:45,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:40:45,980 INFO L356 Elim1Store]: treesize reduction 66, result has 45.5 percent of original size [2022-11-03 01:40:45,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 3671 treesize of output 3402 [2022-11-03 01:40:46,334 INFO L244 Elim1Store]: Index analysis took 102 ms [2022-11-03 01:40:50,992 INFO L356 Elim1Store]: treesize reduction 390, result has 63.0 percent of original size [2022-11-03 01:40:50,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 41 select indices, 41 select index equivalence classes, 781 disjoint index pairs (out of 820 index pairs), introduced 42 new quantified variables, introduced 78 case distinctions, treesize of input 3341 treesize of output 3930 [2022-11-03 01:47:03,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:03,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:47:03,824 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.transform(TermContextTransformationEngine.java:65) 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.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 01:47:03,829 INFO L158 Benchmark]: Toolchain (without parser) took 441898.49ms. Allocated memory was 107.0MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 65.2MB in the beginning and 794.8MB in the end (delta: -729.6MB). Peak memory consumption was 848.2MB. Max. memory is 16.1GB. [2022-11-03 01:47:03,829 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 83.9MB. Free memory is still 39.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:47:03,829 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2213.50ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 65.0MB in the beginning and 75.9MB in the end (delta: -10.9MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. [2022-11-03 01:47:03,830 INFO L158 Benchmark]: Boogie Procedure Inliner took 166.71ms. Allocated memory is still 130.0MB. Free memory was 75.9MB in the beginning and 64.0MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 01:47:03,830 INFO L158 Benchmark]: Boogie Preprocessor took 236.03ms. Allocated memory was 130.0MB in the beginning and 201.3MB in the end (delta: 71.3MB). Free memory was 64.0MB in the beginning and 145.5MB in the end (delta: -81.5MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. [2022-11-03 01:47:03,830 INFO L158 Benchmark]: RCFGBuilder took 2915.85ms. Allocated memory is still 201.3MB. Free memory was 145.5MB in the beginning and 80.6MB in the end (delta: 64.9MB). Peak memory consumption was 73.4MB. Max. memory is 16.1GB. [2022-11-03 01:47:03,831 INFO L158 Benchmark]: TraceAbstraction took 436357.32ms. Allocated memory was 201.3MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 79.5MB in the beginning and 794.8MB in the end (delta: -715.3MB). Peak memory consumption was 768.6MB. Max. memory is 16.1GB. [2022-11-03 01:47:03,832 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 83.9MB. Free memory is still 39.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2213.50ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 65.0MB in the beginning and 75.9MB in the end (delta: -10.9MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 166.71ms. Allocated memory is still 130.0MB. Free memory was 75.9MB in the beginning and 64.0MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 236.03ms. Allocated memory was 130.0MB in the beginning and 201.3MB in the end (delta: 71.3MB). Free memory was 64.0MB in the beginning and 145.5MB in the end (delta: -81.5MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. * RCFGBuilder took 2915.85ms. Allocated memory is still 201.3MB. Free memory was 145.5MB in the beginning and 80.6MB in the end (delta: 64.9MB). Peak memory consumption was 73.4MB. Max. memory is 16.1GB. * TraceAbstraction took 436357.32ms. Allocated memory was 201.3MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 79.5MB in the beginning and 794.8MB in the end (delta: -715.3MB). Peak memory consumption was 768.6MB. 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 01:47:03,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/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_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/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--usb--ipheth.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/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_d8340822-154c-4e54-aefa-e7623837fe2d/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 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 --- 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 01:47:06,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:47:06,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:47:06,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:47:06,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:47:06,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:47:06,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:47:06,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:47:06,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:47:06,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:47:06,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:47:06,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:47:06,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:47:06,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:47:06,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:47:06,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:47:06,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:47:06,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:47:06,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:47:06,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:47:06,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:47:06,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:47:06,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:47:06,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:47:06,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:47:06,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:47:06,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:47:06,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:47:06,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:47:06,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:47:06,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:47:06,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:47:06,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:47:06,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:47:06,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:47:06,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:47:06,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:47:06,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:47:06,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:47:06,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:47:06,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:47:06,402 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:47:06,427 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:47:06,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:47:06,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:47:06,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:47:06,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:47:06,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:47:06,431 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:47:06,431 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:47:06,431 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:47:06,431 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:47:06,432 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:47:06,433 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:47:06,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:47:06,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:47:06,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:47:06,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:47:06,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:47:06,435 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:47:06,436 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:47:06,436 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:47:06,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:47:06,436 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:47:06,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:47:06,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:47:06,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:47:06,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:47:06,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:47:06,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:47:06,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:47:06,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:47:06,438 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:47:06,438 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:47:06,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:47:06,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:47:06,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:47:06,440 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_d8340822-154c-4e54-aefa-e7623837fe2d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 [2022-11-03 01:47:06,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:47:06,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:47:06,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:47:06,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:47:06,919 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:47:06,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2022-11-03 01:47:06,987 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/data/9578a9e93/079cbafc7bab431283021c0f16865e17/FLAG0e2fa3cc4 [2022-11-03 01:47:07,751 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:47:07,752 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2022-11-03 01:47:07,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/data/9578a9e93/079cbafc7bab431283021c0f16865e17/FLAG0e2fa3cc4 [2022-11-03 01:47:07,843 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/data/9578a9e93/079cbafc7bab431283021c0f16865e17 [2022-11-03 01:47:07,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:47:07,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:47:07,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:47:07,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:47:07,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:47:07,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:47:07" (1/1) ... [2022-11-03 01:47:07,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42604c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:07, skipping insertion in model container [2022-11-03 01:47:07,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:47:07" (1/1) ... [2022-11-03 01:47:07,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:47:08,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:47:08,903 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_d8340822-154c-4e54-aefa-e7623837fe2d/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2022-11-03 01:47:09,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:47:09,339 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 01:47:09,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:47:09,564 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_d8340822-154c-4e54-aefa-e7623837fe2d/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2022-11-03 01:47:09,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:47:09,700 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:47:09,888 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_d8340822-154c-4e54-aefa-e7623837fe2d/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2022-11-03 01:47:10,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:47:10,111 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:47:10,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10 WrapperNode [2022-11-03 01:47:10,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:47:10,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:47:10,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:47:10,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:47:10,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (1/1) ... [2022-11-03 01:47:10,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (1/1) ... [2022-11-03 01:47:10,329 INFO L138 Inliner]: procedures = 180, calls = 691, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 1719 [2022-11-03 01:47:10,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:47:10,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:47:10,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:47:10,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:47:10,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (1/1) ... [2022-11-03 01:47:10,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (1/1) ... [2022-11-03 01:47:10,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (1/1) ... [2022-11-03 01:47:10,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (1/1) ... [2022-11-03 01:47:10,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (1/1) ... [2022-11-03 01:47:10,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (1/1) ... [2022-11-03 01:47:10,431 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (1/1) ... [2022-11-03 01:47:10,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (1/1) ... [2022-11-03 01:47:10,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:47:10,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:47:10,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:47:10,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:47:10,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (1/1) ... [2022-11-03 01:47:10,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:47:10,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:10,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:47:10,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:47:10,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_12 [2022-11-03 01:47:10,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_12 [2022-11-03 01:47:10,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 01:47:10,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-03 01:47:10,536 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_8 [2022-11-03 01:47:10,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_8 [2022-11-03 01:47:10,536 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rx_submit [2022-11-03 01:47:10,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rx_submit [2022-11-03 01:47:10,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 01:47:10,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_9 [2022-11-03 01:47:10,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_9 [2022-11-03 01:47:10,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 01:47:10,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 01:47:10,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 01:47:10,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 01:47:10,537 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-03 01:47:10,538 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-03 01:47:10,538 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2022-11-03 01:47:10,538 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2022-11-03 01:47:10,538 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rcvbulk_callback [2022-11-03 01:47:10,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rcvbulk_callback [2022-11-03 01:47:10,538 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-03 01:47:10,539 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-03 01:47:10,539 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-03 01:47:10,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-03 01:47:10,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 01:47:10,539 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 01:47:10,539 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 01:47:10,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 01:47:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 01:47:10,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 01:47:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-03 01:47:10,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-03 01:47:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 01:47:10,541 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 01:47:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 01:47:10,542 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 01:47:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_disconnect [2022-11-03 01:47:10,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_disconnect [2022-11-03 01:47:10,542 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_tx_timeout [2022-11-03 01:47:10,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_tx_timeout [2022-11-03 01:47:10,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 01:47:10,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 01:47:10,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-11-03 01:47:10,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2022-11-03 01:47:10,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-03 01:47:10,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-11-03 01:47:10,544 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 01:47:10,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 01:47:10,545 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:47:10,546 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:47:10,546 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_carrier_set [2022-11-03 01:47:10,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_carrier_set [2022-11-03 01:47:10,547 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-03 01:47:10,547 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-03 01:47:10,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:47:10,547 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-03 01:47:10,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-03 01:47:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:47:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 01:47:10,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 01:47:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_free_urbs [2022-11-03 01:47:10,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_free_urbs [2022-11-03 01:47:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:47:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:47:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2022-11-03 01:47:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2022-11-03 01:47:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 01:47:10,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 01:47:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-11-03 01:47:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-03 01:47:10,550 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-03 01:47:10,551 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-03 01:47:10,551 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-03 01:47:10,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:47:10,551 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-03 01:47:10,551 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-03 01:47:10,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-03 01:47:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-03 01:47:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-11-03 01:47:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:47:10,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 01:47:10,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:47:10,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-11-03 01:47:10,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 01:47:10,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-03 01:47:10,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-11-03 01:47:10,555 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2022-11-03 01:47:10,555 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2022-11-03 01:47:10,556 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 01:47:10,556 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 01:47:10,557 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 01:47:10,557 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 01:47:10,557 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-03 01:47:10,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-03 01:47:10,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-11-03 01:47:10,557 INFO L130 BoogieDeclarations]: Found specification of procedure round_jiffies_relative [2022-11-03 01:47:10,558 INFO L138 BoogieDeclarations]: Found implementation of procedure round_jiffies_relative [2022-11-03 01:47:10,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 01:47:10,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 01:47:10,558 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2022-11-03 01:47:10,558 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2022-11-03 01:47:10,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:47:10,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:47:11,150 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:47:11,154 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:47:11,511 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 01:47:16,683 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-03 01:47:21,637 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:47:21,648 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:47:21,648 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:47:21,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:47:21 BoogieIcfgContainer [2022-11-03 01:47:21,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:47:21,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:47:21,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:47:21,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:47:21,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:47:07" (1/3) ... [2022-11-03 01:47:21,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81dabf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:47:21, skipping insertion in model container [2022-11-03 01:47:21,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:10" (2/3) ... [2022-11-03 01:47:21,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@81dabf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:47:21, skipping insertion in model container [2022-11-03 01:47:21,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:47:21" (3/3) ... [2022-11-03 01:47:21,660 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2022-11-03 01:47:21,678 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:47:21,678 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:47:21,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:47:21,743 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;@79ab01e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:47:21,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:47:21,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 527 states, 386 states have (on average 1.3031088082901554) internal successors, (503), 405 states have internal predecessors, (503), 104 states have call successors, (104), 37 states have call predecessors, (104), 35 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-03 01:47:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 01:47:21,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:21,762 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:21,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash -60987296, now seen corresponding path program 1 times [2022-11-03 01:47:21,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:21,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965745674] [2022-11-03 01:47:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:21,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:21,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:21,791 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:21,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:47:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:22,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:47:22,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:47:22,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:22,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:22,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965745674] [2022-11-03 01:47:22,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965745674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:22,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:22,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:47:22,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527699892] [2022-11-03 01:47:22,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:22,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:22,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:22,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:22,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:22,695 INFO L87 Difference]: Start difference. First operand has 527 states, 386 states have (on average 1.3031088082901554) internal successors, (503), 405 states have internal predecessors, (503), 104 states have call successors, (104), 37 states have call predecessors, (104), 35 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:47:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:23,098 INFO L93 Difference]: Finished difference Result 1538 states and 2106 transitions. [2022-11-03 01:47:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:23,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-11-03 01:47:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:23,130 INFO L225 Difference]: With dead ends: 1538 [2022-11-03 01:47:23,131 INFO L226 Difference]: Without dead ends: 992 [2022-11-03 01:47:23,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 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 01:47:23,149 INFO L413 NwaCegarLoop]: 792 mSDtfsCounter, 650 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:23,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1468 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:47:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-11-03 01:47:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 992. [2022-11-03 01:47:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 738 states have (on average 1.2764227642276422) internal successors, (942), 754 states have internal predecessors, (942), 185 states have call successors, (185), 69 states have call predecessors, (185), 68 states have return successors, (180), 174 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-03 01:47:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1307 transitions. [2022-11-03 01:47:23,320 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1307 transitions. Word has length 34 [2022-11-03 01:47:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:23,321 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 1307 transitions. [2022-11-03 01:47:23,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:47:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1307 transitions. [2022-11-03 01:47:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:47:23,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:23,326 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:23,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:23,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:23,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash -406405667, now seen corresponding path program 1 times [2022-11-03 01:47:23,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:23,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236636484] [2022-11-03 01:47:23,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:23,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:23,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:23,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:23,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:47:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:24,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:47:24,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:47:24,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:24,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:24,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236636484] [2022-11-03 01:47:24,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236636484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:24,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:24,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:47:24,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543918073] [2022-11-03 01:47:24,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:24,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:24,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:24,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:24,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:24,322 INFO L87 Difference]: Start difference. First operand 992 states and 1307 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:24,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:24,557 INFO L93 Difference]: Finished difference Result 1018 states and 1339 transitions. [2022-11-03 01:47:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:24,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-11-03 01:47:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:24,570 INFO L225 Difference]: With dead ends: 1018 [2022-11-03 01:47:24,571 INFO L226 Difference]: Without dead ends: 1005 [2022-11-03 01:47:24,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 01:47:24,573 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 670 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:24,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 706 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:47:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-11-03 01:47:24,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 992. [2022-11-03 01:47:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 738 states have (on average 1.2750677506775068) internal successors, (941), 754 states have internal predecessors, (941), 185 states have call successors, (185), 69 states have call predecessors, (185), 68 states have return successors, (180), 174 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-03 01:47:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1306 transitions. [2022-11-03 01:47:24,696 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1306 transitions. Word has length 44 [2022-11-03 01:47:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:24,696 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 1306 transitions. [2022-11-03 01:47:24,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1306 transitions. [2022-11-03 01:47:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:47:24,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:24,710 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:24,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:24,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:24,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash -349147365, now seen corresponding path program 1 times [2022-11-03 01:47:24,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:24,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952827956] [2022-11-03 01:47:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:24,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:24,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:24,930 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:24,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:47:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:25,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:47:25,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:47:26,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:26,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:26,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952827956] [2022-11-03 01:47:26,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952827956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:26,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:26,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:47:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140507357] [2022-11-03 01:47:26,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:26,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:26,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:26,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:26,126 INFO L87 Difference]: Start difference. First operand 992 states and 1306 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:26,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:26,431 INFO L93 Difference]: Finished difference Result 2957 states and 3985 transitions. [2022-11-03 01:47:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:26,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-11-03 01:47:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:26,445 INFO L225 Difference]: With dead ends: 2957 [2022-11-03 01:47:26,446 INFO L226 Difference]: Without dead ends: 1974 [2022-11-03 01:47:26,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 01:47:26,451 INFO L413 NwaCegarLoop]: 803 mSDtfsCounter, 655 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1458 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 01:47:26,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1458 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:47:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2022-11-03 01:47:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1964. [2022-11-03 01:47:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1465 states have (on average 1.273037542662116) internal successors, (1865), 1493 states have internal predecessors, (1865), 362 states have call successors, (362), 137 states have call predecessors, (362), 136 states have return successors, (393), 345 states have call predecessors, (393), 357 states have call successors, (393) [2022-11-03 01:47:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 2620 transitions. [2022-11-03 01:47:26,650 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 2620 transitions. Word has length 44 [2022-11-03 01:47:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:26,651 INFO L495 AbstractCegarLoop]: Abstraction has 1964 states and 2620 transitions. [2022-11-03 01:47:26,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 2620 transitions. [2022-11-03 01:47:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 01:47:26,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:26,653 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:26,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-03 01:47:26,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:26,876 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:26,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:26,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2061086592, now seen corresponding path program 1 times [2022-11-03 01:47:26,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:26,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683735399] [2022-11-03 01:47:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:26,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:26,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:26,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:26,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:47:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:27,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:47:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:47:28,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:28,009 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:28,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683735399] [2022-11-03 01:47:28,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683735399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:28,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:28,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:47:28,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779699173] [2022-11-03 01:47:28,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:28,012 INFO L87 Difference]: Start difference. First operand 1964 states and 2620 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:28,285 INFO L93 Difference]: Finished difference Result 1966 states and 2621 transitions. [2022-11-03 01:47:28,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:28,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2022-11-03 01:47:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:28,299 INFO L225 Difference]: With dead ends: 1966 [2022-11-03 01:47:28,299 INFO L226 Difference]: Without dead ends: 1963 [2022-11-03 01:47:28,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 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 01:47:28,305 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 640 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 672 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 01:47:28,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 672 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:47:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-03 01:47:28,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1963. [2022-11-03 01:47:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1465 states have (on average 1.2723549488054609) internal successors, (1864), 1492 states have internal predecessors, (1864), 361 states have call successors, (361), 137 states have call predecessors, (361), 136 states have return successors, (393), 345 states have call predecessors, (393), 357 states have call successors, (393) [2022-11-03 01:47:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 2618 transitions. [2022-11-03 01:47:28,535 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 2618 transitions. Word has length 45 [2022-11-03 01:47:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:28,536 INFO L495 AbstractCegarLoop]: Abstraction has 1963 states and 2618 transitions. [2022-11-03 01:47:28,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 2618 transitions. [2022-11-03 01:47:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 01:47:28,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:28,538 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:28,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:28,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:28,751 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:28,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:28,752 INFO L85 PathProgramCache]: Analyzing trace with hash -531067202, now seen corresponding path program 1 times [2022-11-03 01:47:28,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:28,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144163056] [2022-11-03 01:47:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:28,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:28,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:28,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:28,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:47:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:29,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:47:29,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:47:29,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:29,563 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:29,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144163056] [2022-11-03 01:47:29,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144163056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:29,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:29,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:47:29,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982140475] [2022-11-03 01:47:29,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:29,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:29,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:29,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:29,566 INFO L87 Difference]: Start difference. First operand 1963 states and 2618 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:29,780 INFO L93 Difference]: Finished difference Result 1965 states and 2619 transitions. [2022-11-03 01:47:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:29,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-11-03 01:47:29,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:29,792 INFO L225 Difference]: With dead ends: 1965 [2022-11-03 01:47:29,792 INFO L226 Difference]: Without dead ends: 1962 [2022-11-03 01:47:29,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 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 01:47:29,794 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 637 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 670 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 01:47:29,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 670 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:47:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-11-03 01:47:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2022-11-03 01:47:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1465 states have (on average 1.2716723549488054) internal successors, (1863), 1491 states have internal predecessors, (1863), 360 states have call successors, (360), 137 states have call predecessors, (360), 136 states have return successors, (393), 345 states have call predecessors, (393), 357 states have call successors, (393) [2022-11-03 01:47:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2616 transitions. [2022-11-03 01:47:30,005 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2616 transitions. Word has length 46 [2022-11-03 01:47:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:30,005 INFO L495 AbstractCegarLoop]: Abstraction has 1962 states and 2616 transitions. [2022-11-03 01:47:30,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:30,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2616 transitions. [2022-11-03 01:47:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 01:47:30,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:30,007 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:30,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:30,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:30,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:30,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:30,221 INFO L85 PathProgramCache]: Analyzing trace with hash 716548675, now seen corresponding path program 1 times [2022-11-03 01:47:30,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:30,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584471467] [2022-11-03 01:47:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:30,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:30,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:30,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:30,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:47:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:30,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:47:30,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:47:30,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:30,996 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584471467] [2022-11-03 01:47:30,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584471467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:30,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:30,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:47:30,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621550763] [2022-11-03 01:47:30,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:30,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:30,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:30,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:30,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:30,999 INFO L87 Difference]: Start difference. First operand 1962 states and 2616 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:31,203 INFO L93 Difference]: Finished difference Result 1964 states and 2617 transitions. [2022-11-03 01:47:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:31,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-11-03 01:47:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:31,213 INFO L225 Difference]: With dead ends: 1964 [2022-11-03 01:47:31,214 INFO L226 Difference]: Without dead ends: 1961 [2022-11-03 01:47:31,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 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 01:47:31,216 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 634 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 668 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 01:47:31,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 668 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:47:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2022-11-03 01:47:31,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1961. [2022-11-03 01:47:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1465 states have (on average 1.2709897610921501) internal successors, (1862), 1490 states have internal predecessors, (1862), 359 states have call successors, (359), 137 states have call predecessors, (359), 136 states have return successors, (393), 345 states have call predecessors, (393), 357 states have call successors, (393) [2022-11-03 01:47:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2614 transitions. [2022-11-03 01:47:31,432 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2614 transitions. Word has length 47 [2022-11-03 01:47:31,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:31,433 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2614 transitions. [2022-11-03 01:47:31,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2614 transitions. [2022-11-03 01:47:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 01:47:31,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:31,435 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:47:31,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:31,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:31,655 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash 737940065, now seen corresponding path program 1 times [2022-11-03 01:47:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:31,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703852448] [2022-11-03 01:47:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:31,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:31,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:31,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:31,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:47:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:32,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:47:32,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:47:32,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:32,456 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:32,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703852448] [2022-11-03 01:47:32,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703852448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:32,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:32,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:47:32,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206025212] [2022-11-03 01:47:32,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:32,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:32,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:32,458 INFO L87 Difference]: Start difference. First operand 1961 states and 2614 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:32,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:32,654 INFO L93 Difference]: Finished difference Result 1963 states and 2615 transitions. [2022-11-03 01:47:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:32,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-11-03 01:47:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:32,665 INFO L225 Difference]: With dead ends: 1963 [2022-11-03 01:47:32,665 INFO L226 Difference]: Without dead ends: 1951 [2022-11-03 01:47:32,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 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 01:47:32,668 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 631 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 667 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 01:47:32,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:47:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-03 01:47:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1951. [2022-11-03 01:47:32,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1456 states have (on average 1.2706043956043955) internal successors, (1850), 1480 states have internal predecessors, (1850), 358 states have call successors, (358), 137 states have call predecessors, (358), 136 states have return successors, (393), 345 states have call predecessors, (393), 357 states have call successors, (393) [2022-11-03 01:47:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2601 transitions. [2022-11-03 01:47:32,900 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2601 transitions. Word has length 48 [2022-11-03 01:47:32,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:32,901 INFO L495 AbstractCegarLoop]: Abstraction has 1951 states and 2601 transitions. [2022-11-03 01:47:32,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 01:47:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2601 transitions. [2022-11-03 01:47:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 01:47:32,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:32,914 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 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] [2022-11-03 01:47:32,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:33,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:33,127 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:33,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1153772682, now seen corresponding path program 1 times [2022-11-03 01:47:33,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:33,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321340439] [2022-11-03 01:47:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:33,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:33,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:33,130 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:33,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:47:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:34,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:47:34,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-03 01:47:34,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:34,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:34,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321340439] [2022-11-03 01:47:34,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321340439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:34,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:34,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:47:34,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024759612] [2022-11-03 01:47:34,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:34,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:34,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:34,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:34,148 INFO L87 Difference]: Start difference. First operand 1951 states and 2601 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:47:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:34,744 INFO L93 Difference]: Finished difference Result 5256 states and 6964 transitions. [2022-11-03 01:47:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:34,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 153 [2022-11-03 01:47:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:34,762 INFO L225 Difference]: With dead ends: 5256 [2022-11-03 01:47:34,762 INFO L226 Difference]: Without dead ends: 3314 [2022-11-03 01:47:34,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 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 01:47:34,769 INFO L413 NwaCegarLoop]: 780 mSDtfsCounter, 457 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:34,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 1419 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:47:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2022-11-03 01:47:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 3304. [2022-11-03 01:47:35,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3304 states, 2447 states have (on average 1.2689006947282386) internal successors, (3105), 2491 states have internal predecessors, (3105), 599 states have call successors, (599), 258 states have call predecessors, (599), 257 states have return successors, (658), 574 states have call predecessors, (658), 598 states have call successors, (658) [2022-11-03 01:47:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3304 states to 3304 states and 4362 transitions. [2022-11-03 01:47:35,205 INFO L78 Accepts]: Start accepts. Automaton has 3304 states and 4362 transitions. Word has length 153 [2022-11-03 01:47:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:35,206 INFO L495 AbstractCegarLoop]: Abstraction has 3304 states and 4362 transitions. [2022-11-03 01:47:35,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:47:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3304 states and 4362 transitions. [2022-11-03 01:47:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 01:47:35,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:35,214 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 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] [2022-11-03 01:47:35,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:35,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:35,439 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:35,440 INFO L85 PathProgramCache]: Analyzing trace with hash 425318257, now seen corresponding path program 1 times [2022-11-03 01:47:35,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:35,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351916274] [2022-11-03 01:47:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:35,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:35,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:35,447 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:35,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:47:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:36,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1334 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:47:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-03 01:47:36,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:36,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:36,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351916274] [2022-11-03 01:47:36,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351916274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:36,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:36,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:47:36,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393020644] [2022-11-03 01:47:36,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:36,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:47:36,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:36,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:47:36,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:47:36,613 INFO L87 Difference]: Start difference. First operand 3304 states and 4362 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:47:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:37,200 INFO L93 Difference]: Finished difference Result 6616 states and 8760 transitions. [2022-11-03 01:47:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:47:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 162 [2022-11-03 01:47:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:37,221 INFO L225 Difference]: With dead ends: 6616 [2022-11-03 01:47:37,221 INFO L226 Difference]: Without dead ends: 3320 [2022-11-03 01:47:37,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:47:37,233 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 0 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2634 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:37,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2634 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:47:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2022-11-03 01:47:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 3312. [2022-11-03 01:47:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 2451 states have (on average 1.2684618523051816) internal successors, (3109), 2499 states have internal predecessors, (3109), 599 states have call successors, (599), 258 states have call predecessors, (599), 261 states have return successors, (686), 574 states have call predecessors, (686), 598 states have call successors, (686) [2022-11-03 01:47:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 4394 transitions. [2022-11-03 01:47:37,777 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 4394 transitions. Word has length 162 [2022-11-03 01:47:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:37,779 INFO L495 AbstractCegarLoop]: Abstraction has 3312 states and 4394 transitions. [2022-11-03 01:47:37,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 01:47:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 4394 transitions. [2022-11-03 01:47:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-03 01:47:37,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:37,789 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 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] [2022-11-03 01:47:37,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:38,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:38,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1108398985, now seen corresponding path program 1 times [2022-11-03 01:47:38,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:38,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704603284] [2022-11-03 01:47:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:38,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:38,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:38,019 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:38,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:47:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1351 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:47:39,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:47:39,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:39,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:39,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704603284] [2022-11-03 01:47:39,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704603284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:39,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:39,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:47:39,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606452407] [2022-11-03 01:47:39,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:39,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:47:39,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:39,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:47:39,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:47:39,254 INFO L87 Difference]: Start difference. First operand 3312 states and 4394 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:47:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:40,086 INFO L93 Difference]: Finished difference Result 7546 states and 10219 transitions. [2022-11-03 01:47:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:47:40,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 168 [2022-11-03 01:47:40,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:40,108 INFO L225 Difference]: With dead ends: 7546 [2022-11-03 01:47:40,109 INFO L226 Difference]: Without dead ends: 4250 [2022-11-03 01:47:40,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:47:40,119 INFO L413 NwaCegarLoop]: 861 mSDtfsCounter, 298 mSDsluCounter, 3085 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 3946 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:40,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 3946 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:47:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2022-11-03 01:47:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 3324. [2022-11-03 01:47:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 2463 states have (on average 1.2671538773853024) internal successors, (3121), 2507 states have internal predecessors, (3121), 599 states have call successors, (599), 258 states have call predecessors, (599), 261 states have return successors, (686), 578 states have call predecessors, (686), 598 states have call successors, (686) [2022-11-03 01:47:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 4406 transitions. [2022-11-03 01:47:40,590 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 4406 transitions. Word has length 168 [2022-11-03 01:47:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:40,591 INFO L495 AbstractCegarLoop]: Abstraction has 3324 states and 4406 transitions. [2022-11-03 01:47:40,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:47:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 4406 transitions. [2022-11-03 01:47:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 01:47:40,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:40,600 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 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] [2022-11-03 01:47:40,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:40,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:40,815 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:40,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:40,816 INFO L85 PathProgramCache]: Analyzing trace with hash 485316577, now seen corresponding path program 2 times [2022-11-03 01:47:40,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:40,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163893768] [2022-11-03 01:47:40,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:47:40,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:40,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:40,819 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:40,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:47:42,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:47:42,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:47:42,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1368 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:47:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:47:42,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:42,953 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163893768] [2022-11-03 01:47:42,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163893768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:42,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:42,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:47:42,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843193279] [2022-11-03 01:47:42,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:42,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:47:42,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:42,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:47:42,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:47:42,967 INFO L87 Difference]: Start difference. First operand 3324 states and 4406 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:47:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:44,086 INFO L93 Difference]: Finished difference Result 8528 states and 11726 transitions. [2022-11-03 01:47:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:47:44,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 174 [2022-11-03 01:47:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:44,114 INFO L225 Difference]: With dead ends: 8528 [2022-11-03 01:47:44,115 INFO L226 Difference]: Without dead ends: 5220 [2022-11-03 01:47:44,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:47:44,126 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 459 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 4258 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:44,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 4258 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:47:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2022-11-03 01:47:44,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 3336. [2022-11-03 01:47:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 2475 states have (on average 1.2658585858585858) internal successors, (3133), 2515 states have internal predecessors, (3133), 599 states have call successors, (599), 258 states have call predecessors, (599), 261 states have return successors, (686), 582 states have call predecessors, (686), 598 states have call successors, (686) [2022-11-03 01:47:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4418 transitions. [2022-11-03 01:47:44,594 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4418 transitions. Word has length 174 [2022-11-03 01:47:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:44,595 INFO L495 AbstractCegarLoop]: Abstraction has 3336 states and 4418 transitions. [2022-11-03 01:47:44,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:47:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4418 transitions. [2022-11-03 01:47:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-03 01:47:44,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:44,604 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 01:47:44,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:44,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:44,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash -175240903, now seen corresponding path program 3 times [2022-11-03 01:47:44,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:44,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948435807] [2022-11-03 01:47:44,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:47:44,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:44,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:44,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:44,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:47:46,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:47:46,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:47:46,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:47:46,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-03 01:47:46,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:46,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:46,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948435807] [2022-11-03 01:47:46,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948435807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:46,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:46,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:47:46,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968653173] [2022-11-03 01:47:46,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:46,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:47:46,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:47:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:47:46,425 INFO L87 Difference]: Start difference. First operand 3336 states and 4418 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 01:47:46,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:46,924 INFO L93 Difference]: Finished difference Result 6696 states and 8884 transitions. [2022-11-03 01:47:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:47:46,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 180 [2022-11-03 01:47:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:46,941 INFO L225 Difference]: With dead ends: 6696 [2022-11-03 01:47:46,942 INFO L226 Difference]: Without dead ends: 3376 [2022-11-03 01:47:46,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:47:46,952 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 4 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:46,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2636 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:47:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2022-11-03 01:47:47,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 3362. [2022-11-03 01:47:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3362 states, 2495 states have (on average 1.2653306613226454) internal successors, (3157), 2533 states have internal predecessors, (3157), 603 states have call successors, (603), 258 states have call predecessors, (603), 263 states have return successors, (694), 590 states have call predecessors, (694), 602 states have call successors, (694) [2022-11-03 01:47:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 4454 transitions. [2022-11-03 01:47:47,544 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 4454 transitions. Word has length 180 [2022-11-03 01:47:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:47,545 INFO L495 AbstractCegarLoop]: Abstraction has 3362 states and 4454 transitions. [2022-11-03 01:47:47,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 01:47:47,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 4454 transitions. [2022-11-03 01:47:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-03 01:47:47,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:47,555 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-11-03 01:47:47,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:47,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:47,771 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1850518817, now seen corresponding path program 4 times [2022-11-03 01:47:47,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:47,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754779898] [2022-11-03 01:47:47,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:47:47,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:47,774 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:47,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:47:48,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:47:48,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:47:48,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:47:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:47:48,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:48,912 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:48,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754779898] [2022-11-03 01:47:48,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754779898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:48,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:48,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:47:48,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329186644] [2022-11-03 01:47:48,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:48,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:48,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:48,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:48,914 INFO L87 Difference]: Start difference. First operand 3362 states and 4454 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 01:47:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:49,252 INFO L93 Difference]: Finished difference Result 6712 states and 8896 transitions. [2022-11-03 01:47:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:49,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 186 [2022-11-03 01:47:49,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:49,262 INFO L225 Difference]: With dead ends: 6712 [2022-11-03 01:47:49,262 INFO L226 Difference]: Without dead ends: 3366 [2022-11-03 01:47:49,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 184 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 01:47:49,273 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 0 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:49,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1319 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:47:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2022-11-03 01:47:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3366. [2022-11-03 01:47:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 2499 states have (on average 1.264905962384954) internal successors, (3161), 2537 states have internal predecessors, (3161), 603 states have call successors, (603), 258 states have call predecessors, (603), 263 states have return successors, (694), 590 states have call predecessors, (694), 602 states have call successors, (694) [2022-11-03 01:47:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4458 transitions. [2022-11-03 01:47:49,604 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4458 transitions. Word has length 186 [2022-11-03 01:47:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:49,604 INFO L495 AbstractCegarLoop]: Abstraction has 3366 states and 4458 transitions. [2022-11-03 01:47:49,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 01:47:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4458 transitions. [2022-11-03 01:47:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-03 01:47:49,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:49,615 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-11-03 01:47:49,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:49,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:49,830 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:49,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:49,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1264242595, now seen corresponding path program 1 times [2022-11-03 01:47:49,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:49,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411063655] [2022-11-03 01:47:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:49,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:49,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:49,833 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:49,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:47:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:51,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:47:51,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-03 01:47:51,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:51,543 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:51,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411063655] [2022-11-03 01:47:51,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411063655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:51,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:51,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 01:47:51,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497498102] [2022-11-03 01:47:51,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:51,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:47:51,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:51,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:47:51,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:47:51,547 INFO L87 Difference]: Start difference. First operand 3366 states and 4458 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 01:47:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:52,572 INFO L93 Difference]: Finished difference Result 7854 states and 10631 transitions. [2022-11-03 01:47:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:47:52,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 186 [2022-11-03 01:47:52,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:52,596 INFO L225 Difference]: With dead ends: 7854 [2022-11-03 01:47:52,596 INFO L226 Difference]: Without dead ends: 4504 [2022-11-03 01:47:52,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:47:52,608 INFO L413 NwaCegarLoop]: 921 mSDtfsCounter, 397 mSDsluCounter, 4132 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 5053 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:52,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 5053 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:47:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2022-11-03 01:47:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 3382. [2022-11-03 01:47:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 2515 states have (on average 1.263220675944334) internal successors, (3177), 2549 states have internal predecessors, (3177), 603 states have call successors, (603), 258 states have call predecessors, (603), 263 states have return successors, (694), 594 states have call predecessors, (694), 602 states have call successors, (694) [2022-11-03 01:47:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 4474 transitions. [2022-11-03 01:47:53,360 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 4474 transitions. Word has length 186 [2022-11-03 01:47:53,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:53,361 INFO L495 AbstractCegarLoop]: Abstraction has 3382 states and 4474 transitions. [2022-11-03 01:47:53,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 01:47:53,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 4474 transitions. [2022-11-03 01:47:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-03 01:47:53,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:53,372 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 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] [2022-11-03 01:47:53,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:53,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:53,595 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:53,596 INFO L85 PathProgramCache]: Analyzing trace with hash -494735621, now seen corresponding path program 1 times [2022-11-03 01:47:53,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:53,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195702760] [2022-11-03 01:47:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:53,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:53,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:53,598 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:53,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:47:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:54,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:47:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 01:47:55,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:55,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195702760] [2022-11-03 01:47:55,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195702760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:55,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:55,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:47:55,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093837999] [2022-11-03 01:47:55,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:55,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:47:55,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:47:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:47:55,021 INFO L87 Difference]: Start difference. First operand 3382 states and 4474 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 01:47:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:56,495 INFO L93 Difference]: Finished difference Result 9726 states and 13521 transitions. [2022-11-03 01:47:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:47:56,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 192 [2022-11-03 01:47:56,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:56,523 INFO L225 Difference]: With dead ends: 9726 [2022-11-03 01:47:56,523 INFO L226 Difference]: Without dead ends: 6360 [2022-11-03 01:47:56,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:47:56,535 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 852 mSDsluCounter, 2715 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 3869 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:56,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 3869 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:47:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2022-11-03 01:47:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 3394. [2022-11-03 01:47:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3394 states, 2527 states have (on average 1.261970716264345) internal successors, (3189), 2561 states have internal predecessors, (3189), 603 states have call successors, (603), 258 states have call predecessors, (603), 263 states have return successors, (694), 594 states have call predecessors, (694), 602 states have call successors, (694) [2022-11-03 01:47:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3394 states to 3394 states and 4486 transitions. [2022-11-03 01:47:57,185 INFO L78 Accepts]: Start accepts. Automaton has 3394 states and 4486 transitions. Word has length 192 [2022-11-03 01:47:57,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:57,186 INFO L495 AbstractCegarLoop]: Abstraction has 3394 states and 4486 transitions. [2022-11-03 01:47:57,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 01:47:57,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3394 states and 4486 transitions. [2022-11-03 01:47:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-03 01:47:57,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:57,197 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 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] [2022-11-03 01:47:57,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:47:57,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:47:57,410 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:47:57,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:57,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1546528150, now seen corresponding path program 1 times [2022-11-03 01:47:57,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:47:57,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769199389] [2022-11-03 01:47:57,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:57,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:47:57,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:47:57,415 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:47:57,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:47:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:59,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:47:59,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:47:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 01:47:59,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:47:59,065 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:47:59,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769199389] [2022-11-03 01:47:59,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769199389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:59,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:59,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:47:59,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673568985] [2022-11-03 01:47:59,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:59,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:59,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:47:59,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:59,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:59,068 INFO L87 Difference]: Start difference. First operand 3394 states and 4486 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 01:47:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:59,706 INFO L93 Difference]: Finished difference Result 7914 states and 10691 transitions. [2022-11-03 01:47:59,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:59,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 202 [2022-11-03 01:47:59,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:59,759 INFO L225 Difference]: With dead ends: 7914 [2022-11-03 01:47:59,759 INFO L226 Difference]: Without dead ends: 4536 [2022-11-03 01:47:59,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 200 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 01:47:59,771 INFO L413 NwaCegarLoop]: 925 mSDtfsCounter, 244 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:59,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1565 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:47:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2022-11-03 01:48:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3386. [2022-11-03 01:48:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 2523 states have (on average 1.260800634165676) internal successors, (3181), 2557 states have internal predecessors, (3181), 599 states have call successors, (599), 258 states have call predecessors, (599), 263 states have return successors, (690), 590 states have call predecessors, (690), 598 states have call successors, (690) [2022-11-03 01:48:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 4470 transitions. [2022-11-03 01:48:00,488 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 4470 transitions. Word has length 202 [2022-11-03 01:48:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:00,489 INFO L495 AbstractCegarLoop]: Abstraction has 3386 states and 4470 transitions. [2022-11-03 01:48:00,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 01:48:00,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 4470 transitions. [2022-11-03 01:48:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-03 01:48:00,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:00,502 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 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] [2022-11-03 01:48:00,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:00,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:00,728 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash -68436010, now seen corresponding path program 1 times [2022-11-03 01:48:00,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:00,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722747032] [2022-11-03 01:48:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:00,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:00,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:00,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:00,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:48:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:02,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:48:02,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 01:48:02,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:02,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:02,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722747032] [2022-11-03 01:48:02,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722747032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:02,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:02,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:48:02,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136052441] [2022-11-03 01:48:02,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:02,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:48:02,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:02,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:48:02,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:48:02,534 INFO L87 Difference]: Start difference. First operand 3386 states and 4470 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 01:48:04,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:48:05,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:05,357 INFO L93 Difference]: Finished difference Result 7938 states and 10887 transitions. [2022-11-03 01:48:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:48:05,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 3 states have call successors, (19) Word has length 202 [2022-11-03 01:48:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:05,379 INFO L225 Difference]: With dead ends: 7938 [2022-11-03 01:48:05,379 INFO L226 Difference]: Without dead ends: 4568 [2022-11-03 01:48:05,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:48:05,392 INFO L413 NwaCegarLoop]: 919 mSDtfsCounter, 246 mSDsluCounter, 2467 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 3386 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:05,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 3386 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 01:48:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4568 states. [2022-11-03 01:48:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4568 to 3410. [2022-11-03 01:48:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 2543 states have (on average 1.26189539913488) internal successors, (3209), 2581 states have internal predecessors, (3209), 599 states have call successors, (599), 258 states have call predecessors, (599), 267 states have return successors, (698), 590 states have call predecessors, (698), 598 states have call successors, (698) [2022-11-03 01:48:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 4506 transitions. [2022-11-03 01:48:06,102 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 4506 transitions. Word has length 202 [2022-11-03 01:48:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:06,102 INFO L495 AbstractCegarLoop]: Abstraction has 3410 states and 4506 transitions. [2022-11-03 01:48:06,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 01:48:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 4506 transitions. [2022-11-03 01:48:06,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-03 01:48:06,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:06,112 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 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] [2022-11-03 01:48:06,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:06,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:06,335 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:06,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1541972954, now seen corresponding path program 1 times [2022-11-03 01:48:06,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:06,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493354035] [2022-11-03 01:48:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:06,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:06,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:06,339 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:06,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:48:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:08,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:48:08,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 01:48:08,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 01:48:08,734 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493354035] [2022-11-03 01:48:08,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493354035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:08,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1374313815] [2022-11-03 01:48:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:08,735 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:08,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:08,738 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:08,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 01:48:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:10,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:48:10,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-03 01:48:10,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:10,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1374313815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:10,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:48:10,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-11-03 01:48:10,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844774775] [2022-11-03 01:48:10,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:10,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:48:10,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:10,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:48:10,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:48:10,384 INFO L87 Difference]: Start difference. First operand 3410 states and 4506 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 3 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 01:48:14,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:14,867 INFO L93 Difference]: Finished difference Result 14598 states and 20186 transitions. [2022-11-03 01:48:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 01:48:14,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 3 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 203 [2022-11-03 01:48:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:14,924 INFO L225 Difference]: With dead ends: 14598 [2022-11-03 01:48:14,924 INFO L226 Difference]: Without dead ends: 11204 [2022-11-03 01:48:14,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:48:14,940 INFO L413 NwaCegarLoop]: 1717 mSDtfsCounter, 1633 mSDsluCounter, 5423 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 7140 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:14,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1670 Valid, 7140 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:48:14,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11204 states. [2022-11-03 01:48:16,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11204 to 6840. [2022-11-03 01:48:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 5097 states have (on average 1.260349225034334) internal successors, (6424), 5185 states have internal predecessors, (6424), 1209 states have call successors, (1209), 514 states have call predecessors, (1209), 533 states have return successors, (1408), 1180 states have call predecessors, (1408), 1208 states have call successors, (1408) [2022-11-03 01:48:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 9041 transitions. [2022-11-03 01:48:16,572 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 9041 transitions. Word has length 203 [2022-11-03 01:48:16,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:16,574 INFO L495 AbstractCegarLoop]: Abstraction has 6840 states and 9041 transitions. [2022-11-03 01:48:16,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 3 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 01:48:16,574 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 9041 transitions. [2022-11-03 01:48:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-03 01:48:16,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:16,591 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 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] [2022-11-03 01:48:16,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:16,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:17,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:48:17,004 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1741877092, now seen corresponding path program 1 times [2022-11-03 01:48:17,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:17,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173008800] [2022-11-03 01:48:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:17,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:17,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:17,007 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:17,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:48:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:18,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:48:18,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 01:48:19,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 01:48:19,435 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:19,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173008800] [2022-11-03 01:48:19,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173008800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:19,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1540405340] [2022-11-03 01:48:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:19,436 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:19,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:19,440 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:19,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 01:48:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:21,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:48:21,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-03 01:48:21,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:21,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1540405340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:21,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:48:21,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 6] total 14 [2022-11-03 01:48:21,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728137228] [2022-11-03 01:48:21,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:21,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:48:21,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:48:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:48:21,497 INFO L87 Difference]: Start difference. First operand 6840 states and 9041 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 01:48:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:29,125 INFO L93 Difference]: Finished difference Result 17552 states and 23910 transitions. [2022-11-03 01:48:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:48:29,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 203 [2022-11-03 01:48:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:29,167 INFO L225 Difference]: With dead ends: 17552 [2022-11-03 01:48:29,167 INFO L226 Difference]: Without dead ends: 10728 [2022-11-03 01:48:29,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:48:29,186 INFO L413 NwaCegarLoop]: 1295 mSDtfsCounter, 2058 mSDsluCounter, 5989 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2104 SdHoareTripleChecker+Valid, 7284 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:29,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2104 Valid, 7284 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 01:48:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2022-11-03 01:48:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 6840. [2022-11-03 01:48:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 5097 states have (on average 1.2595644496762801) internal successors, (6420), 5185 states have internal predecessors, (6420), 1209 states have call successors, (1209), 514 states have call predecessors, (1209), 533 states have return successors, (1408), 1180 states have call predecessors, (1408), 1208 states have call successors, (1408) [2022-11-03 01:48:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 9037 transitions. [2022-11-03 01:48:30,862 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 9037 transitions. Word has length 203 [2022-11-03 01:48:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:30,863 INFO L495 AbstractCegarLoop]: Abstraction has 6840 states and 9037 transitions. [2022-11-03 01:48:30,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 01:48:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 9037 transitions. [2022-11-03 01:48:30,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 01:48:30,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:30,877 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 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] [2022-11-03 01:48:30,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:31,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:31,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:31,291 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:31,292 INFO L85 PathProgramCache]: Analyzing trace with hash 163299323, now seen corresponding path program 1 times [2022-11-03 01:48:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:48:31,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904633567] [2022-11-03 01:48:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:31,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:48:31,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:48:31,295 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:48:31,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:48:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:32,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:48:32,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-03 01:48:33,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-03 01:48:33,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:33,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904633567] [2022-11-03 01:48:33,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904633567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:33,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1399296382] [2022-11-03 01:48:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:33,424 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:33,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:33,425 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:33,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 01:48:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:34,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:48:34,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 67 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 01:48:37,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-03 01:48:39,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1399296382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:39,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396898427] [2022-11-03 01:48:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:39,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:39,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:39,100 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:39,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 01:48:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:40,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:48:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-03 01:48:41,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-03 01:48:42,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396898427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:42,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:48:42,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 13, 8, 8, 8] total 26 [2022-11-03 01:48:42,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793168207] [2022-11-03 01:48:42,671 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:42,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 01:48:42,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:48:42,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 01:48:42,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:48:42,673 INFO L87 Difference]: Start difference. First operand 6840 states and 9037 transitions. Second operand has 26 states, 26 states have (on average 12.76923076923077) internal successors, (332), 23 states have internal predecessors, (332), 9 states have call successors, (62), 5 states have call predecessors, (62), 7 states have return successors, (62), 10 states have call predecessors, (62), 9 states have call successors, (62) [2022-11-03 01:48:49,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:48:51,660 WARN L539 Checker$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 01:49:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:23,733 INFO L93 Difference]: Finished difference Result 20516 states and 28428 transitions. [2022-11-03 01:49:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 01:49:23,734 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 12.76923076923077) internal successors, (332), 23 states have internal predecessors, (332), 9 states have call successors, (62), 5 states have call predecessors, (62), 7 states have return successors, (62), 10 states have call predecessors, (62), 9 states have call successors, (62) Word has length 230 [2022-11-03 01:49:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:23,777 INFO L225 Difference]: With dead ends: 20516 [2022-11-03 01:49:23,777 INFO L226 Difference]: Without dead ends: 13692 [2022-11-03 01:49:23,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1412 GetRequests, 1359 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 01:49:23,796 INFO L413 NwaCegarLoop]: 1394 mSDtfsCounter, 3629 mSDsluCounter, 13714 mSDsCounter, 0 mSdLazyCounter, 7721 mSolverCounterSat, 1562 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 15108 SdHoareTripleChecker+Invalid, 9285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1562 IncrementalHoareTripleChecker+Valid, 7721 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:23,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3740 Valid, 15108 Invalid, 9285 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1562 Valid, 7721 Invalid, 2 Unknown, 0 Unchecked, 34.5s Time] [2022-11-03 01:49:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13692 states. [2022-11-03 01:49:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13692 to 7014. [2022-11-03 01:49:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7014 states, 5211 states have (on average 1.2550374208405297) internal successors, (6540), 5299 states have internal predecessors, (6540), 1211 states have call successors, (1211), 508 states have call predecessors, (1211), 591 states have return successors, (1402), 1246 states have call predecessors, (1402), 1210 states have call successors, (1402) [2022-11-03 01:49:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7014 states to 7014 states and 9153 transitions. [2022-11-03 01:49:25,523 INFO L78 Accepts]: Start accepts. Automaton has 7014 states and 9153 transitions. Word has length 230 [2022-11-03 01:49:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:25,524 INFO L495 AbstractCegarLoop]: Abstraction has 7014 states and 9153 transitions. [2022-11-03 01:49:25,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.76923076923077) internal successors, (332), 23 states have internal predecessors, (332), 9 states have call successors, (62), 5 states have call predecessors, (62), 7 states have return successors, (62), 10 states have call predecessors, (62), 9 states have call successors, (62) [2022-11-03 01:49:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7014 states and 9153 transitions. [2022-11-03 01:49:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-11-03 01:49:25,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:25,538 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 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] [2022-11-03 01:49:25,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:25,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:25,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:26,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:49:26,145 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1083598575, now seen corresponding path program 2 times [2022-11-03 01:49:26,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:26,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147308939] [2022-11-03 01:49:26,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:49:26,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:26,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:26,149 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:26,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:49:29,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:49:29,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:49:29,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 2044 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:49:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-03 01:49:29,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-03 01:49:29,913 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:29,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147308939] [2022-11-03 01:49:29,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147308939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:29,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1170300189] [2022-11-03 01:49:29,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:49:29,914 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:49:29,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:49:29,915 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:49:29,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 01:49:34,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:49:34,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:49:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 2044 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:49:34,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-03 01:49:35,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-03 01:49:44,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1170300189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:44,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662768958] [2022-11-03 01:49:44,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:49:44,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:44,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:44,119 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:44,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 01:49:45,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:49:45,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:49:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2044 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:49:45,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-03 01:49:46,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:46,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662768958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:46,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 01:49:46,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7, 11, 12] total 31 [2022-11-03 01:49:46,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261429225] [2022-11-03 01:49:46,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:46,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:46,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:49:46,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:46,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-11-03 01:49:46,498 INFO L87 Difference]: Start difference. First operand 7014 states and 9153 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 01:49:48,639 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 01:49:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:50,729 INFO L93 Difference]: Finished difference Result 16406 states and 21982 transitions. [2022-11-03 01:49:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:49:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 3 states have call successors, (21) Word has length 231 [2022-11-03 01:49:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:50,758 INFO L225 Difference]: With dead ends: 16406 [2022-11-03 01:49:50,758 INFO L226 Difference]: Without dead ends: 9408 [2022-11-03 01:49:50,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1151 GetRequests, 1121 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:49:50,776 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 245 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 3388 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:50,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 3388 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 01:49:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2022-11-03 01:49:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 7022. [2022-11-03 01:49:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7022 states, 5219 states have (on average 1.2561793447020502) internal successors, (6556), 5307 states have internal predecessors, (6556), 1211 states have call successors, (1211), 508 states have call predecessors, (1211), 591 states have return successors, (1402), 1246 states have call predecessors, (1402), 1210 states have call successors, (1402) [2022-11-03 01:49:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 9169 transitions. [2022-11-03 01:49:52,215 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 9169 transitions. Word has length 231 [2022-11-03 01:49:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:52,216 INFO L495 AbstractCegarLoop]: Abstraction has 7022 states and 9169 transitions. [2022-11-03 01:49:52,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 01:49:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 9169 transitions. [2022-11-03 01:49:52,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-03 01:49:52,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:52,225 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 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] [2022-11-03 01:49:52,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:52,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:52,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:52,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:49:52,839 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:52,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:52,840 INFO L85 PathProgramCache]: Analyzing trace with hash 889687197, now seen corresponding path program 1 times [2022-11-03 01:49:52,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:49:52,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117709451] [2022-11-03 01:49:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:52,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:49:52,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:49:52,842 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:49:52,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:49:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:49:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-03 01:49:55,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-11-03 01:49:55,845 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:49:55,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117709451] [2022-11-03 01:49:55,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117709451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:55,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [431815166] [2022-11-03 01:49:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:55,846 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:49:55,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:49:55,851 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:49:55,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 01:49:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:58,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:49:58,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-03 01:49:59,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-03 01:50:08,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [431815166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:08,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001271202] [2022-11-03 01:50:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:08,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:08,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:08,289 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:08,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 01:50:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:10,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:50:10,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-03 01:50:12,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-03 01:50:17,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001271202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:17,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:50:17,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 12, 12, 12] total 48 [2022-11-03 01:50:17,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788805982] [2022-11-03 01:50:17,360 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:17,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:50:17,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:17,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:50:17,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2105, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 01:50:17,363 INFO L87 Difference]: Start difference. First operand 7022 states and 9169 transitions. Second operand has 48 states, 46 states have (on average 6.086956521739131) internal successors, (280), 41 states have internal predecessors, (280), 18 states have call successors, (52), 7 states have call predecessors, (52), 16 states have return successors, (56), 20 states have call predecessors, (56), 18 states have call successors, (56) [2022-11-03 01:50:27,547 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 01:50:30,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:50:33,288 WARN L539 Checker$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 01:52:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:59,238 INFO L93 Difference]: Finished difference Result 26322 states and 37286 transitions. [2022-11-03 01:52:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-03 01:52:59,242 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 6.086956521739131) internal successors, (280), 41 states have internal predecessors, (280), 18 states have call successors, (52), 7 states have call predecessors, (52), 16 states have return successors, (56), 20 states have call predecessors, (56), 18 states have call successors, (56) Word has length 232 [2022-11-03 01:52:59,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:59,289 INFO L225 Difference]: With dead ends: 26322 [2022-11-03 01:52:59,289 INFO L226 Difference]: Without dead ends: 19316 [2022-11-03 01:52:59,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1452 GetRequests, 1354 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=949, Invalid=8951, Unknown=0, NotChecked=0, Total=9900 [2022-11-03 01:52:59,310 INFO L413 NwaCegarLoop]: 2084 mSDtfsCounter, 11861 mSDsluCounter, 43748 mSDsCounter, 0 mSdLazyCounter, 26462 mSolverCounterSat, 4111 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11901 SdHoareTripleChecker+Valid, 45832 SdHoareTripleChecker+Invalid, 30576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 4111 IncrementalHoareTripleChecker+Valid, 26462 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:59,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11901 Valid, 45832 Invalid, 30576 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [4111 Valid, 26462 Invalid, 3 Unknown, 0 Unchecked, 141.6s Time] [2022-11-03 01:52:59,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19316 states. [2022-11-03 01:53:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19316 to 7094. [2022-11-03 01:53:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7094 states, 5271 states have (on average 1.2544109277177007) internal successors, (6612), 5359 states have internal predecessors, (6612), 1231 states have call successors, (1231), 508 states have call predecessors, (1231), 591 states have return successors, (1426), 1266 states have call predecessors, (1426), 1230 states have call successors, (1426) [2022-11-03 01:53:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7094 states to 7094 states and 9269 transitions. [2022-11-03 01:53:01,726 INFO L78 Accepts]: Start accepts. Automaton has 7094 states and 9269 transitions. Word has length 232 [2022-11-03 01:53:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:01,726 INFO L495 AbstractCegarLoop]: Abstraction has 7094 states and 9269 transitions. [2022-11-03 01:53:01,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 6.086956521739131) internal successors, (280), 41 states have internal predecessors, (280), 18 states have call successors, (52), 7 states have call predecessors, (52), 16 states have return successors, (56), 20 states have call predecessors, (56), 18 states have call successors, (56) [2022-11-03 01:53:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 7094 states and 9269 transitions. [2022-11-03 01:53:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-03 01:53:01,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:01,738 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 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] [2022-11-03 01:53:01,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:01,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:02,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:02,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:02,339 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:02,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1940103240, now seen corresponding path program 1 times [2022-11-03 01:53:02,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:02,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303085837] [2022-11-03 01:53:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:02,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:02,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:02,343 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:02,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 01:53:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:05,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 2413 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:53:05,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 95 proven. 6 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-03 01:53:05,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-11-03 01:53:06,472 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:06,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303085837] [2022-11-03 01:53:06,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303085837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:06,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [805533056] [2022-11-03 01:53:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:06,476 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:06,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:06,477 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:06,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 01:53:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:09,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 2413 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:53:09,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-03 01:53:09,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:09,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [805533056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:09,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:09,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 8] total 15 [2022-11-03 01:53:09,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122134829] [2022-11-03 01:53:09,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:09,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:53:09,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:53:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:53:09,205 INFO L87 Difference]: Start difference. First operand 7094 states and 9269 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 01:53:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:12,808 INFO L93 Difference]: Finished difference Result 17544 states and 23663 transitions. [2022-11-03 01:53:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:53:12,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 249 [2022-11-03 01:53:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:12,839 INFO L225 Difference]: With dead ends: 17544 [2022-11-03 01:53:12,839 INFO L226 Difference]: Without dead ends: 10466 [2022-11-03 01:53:12,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:53:12,852 INFO L413 NwaCegarLoop]: 969 mSDtfsCounter, 547 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:12,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 2537 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:53:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10466 states. [2022-11-03 01:53:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10466 to 7094. [2022-11-03 01:53:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7094 states, 5271 states have (on average 1.253652058432935) internal successors, (6608), 5359 states have internal predecessors, (6608), 1231 states have call successors, (1231), 508 states have call predecessors, (1231), 591 states have return successors, (1426), 1266 states have call predecessors, (1426), 1230 states have call successors, (1426) [2022-11-03 01:53:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7094 states to 7094 states and 9265 transitions. [2022-11-03 01:53:14,564 INFO L78 Accepts]: Start accepts. Automaton has 7094 states and 9265 transitions. Word has length 249 [2022-11-03 01:53:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:14,565 INFO L495 AbstractCegarLoop]: Abstraction has 7094 states and 9265 transitions. [2022-11-03 01:53:14,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 01:53:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 7094 states and 9265 transitions. [2022-11-03 01:53:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-03 01:53:14,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:14,574 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 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] [2022-11-03 01:53:14,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:14,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-03 01:53:14,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:14,975 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:14,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:14,975 INFO L85 PathProgramCache]: Analyzing trace with hash -235652530, now seen corresponding path program 1 times [2022-11-03 01:53:14,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:14,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757726248] [2022-11-03 01:53:14,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:14,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:14,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:14,979 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:14,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 01:53:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:17,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 2451 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:53:18,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-03 01:53:18,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-11-03 01:53:19,226 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:19,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757726248] [2022-11-03 01:53:19,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757726248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:19,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [315898677] [2022-11-03 01:53:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:19,226 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:19,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:19,227 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:19,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8340822-154c-4e54-aefa-e7623837fe2d/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 01:53:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:22,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 2451 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:53:22,112 INFO L286 TraceCheckSpWp]: Computing forward predicates...