./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P --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 5df375afe9fb68708289d9f3c6788a2547ede1538b0aa584ee561e48e9fb4c63 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:52:37,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:52:37,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:52:37,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:52:37,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:52:37,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:52:37,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:52:37,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:52:37,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:52:37,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:52:37,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:52:37,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:52:37,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:52:37,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:52:37,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:52:37,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:52:37,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:52:37,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:52:37,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:52:37,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:52:37,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:52:37,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:52:37,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:52:37,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:52:37,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:52:37,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:52:37,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:52:37,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:52:37,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:52:37,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:52:37,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:52:37,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:52:37,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:52:37,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:52:37,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:52:37,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:52:37,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:52:37,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:52:37,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:52:37,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:52:37,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:52:37,213 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:52:37,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:52:37,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:52:37,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:52:37,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:52:37,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:52:37,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:52:37,243 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:52:37,244 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:52:37,244 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:52:37,244 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:52:37,245 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:52:37,245 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:52:37,245 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:52:37,246 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:52:37,246 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:52:37,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:52:37,247 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:52:37,247 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:52:37,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:52:37,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:52:37,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:52:37,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:52:37,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:52:37,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:52:37,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:52:37,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:52:37,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:52:37,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:52:37,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:52:37,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:52:37,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:52:37,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:52:37,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:52:37,253 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:52:37,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:52:37,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:52:37,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:52:37,255 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:52:37,255 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5df375afe9fb68708289d9f3c6788a2547ede1538b0aa584ee561e48e9fb4c63 [2021-11-21 01:52:37,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:52:37,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:52:37,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:52:37,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:52:37,585 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:52:37,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i [2021-11-21 01:52:37,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/data/b18ee2d99/2bd743bf75c448c8b0b3cd62d625ffb3/FLAGc1ed4ff6d [2021-11-21 01:52:38,707 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:52:38,708 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i [2021-11-21 01:52:38,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/data/b18ee2d99/2bd743bf75c448c8b0b3cd62d625ffb3/FLAGc1ed4ff6d [2021-11-21 01:52:39,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/data/b18ee2d99/2bd743bf75c448c8b0b3cd62d625ffb3 [2021-11-21 01:52:39,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:52:39,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:52:39,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:52:39,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:52:39,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:52:39,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:52:39" (1/1) ... [2021-11-21 01:52:39,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7601502a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:39, skipping insertion in model container [2021-11-21 01:52:39,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:52:39" (1/1) ... [2021-11-21 01:52:39,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:52:39,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:52:40,774 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_19c98cba-2079-47ce-92cb-35ef9a1f364b/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i[209494,209507] [2021-11-21 01:52:42,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:52:42,690 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:52:42,867 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_19c98cba-2079-47ce-92cb-35ef9a1f364b/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i[209494,209507] [2021-11-21 01:52:43,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:52:43,370 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:52:43,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43 WrapperNode [2021-11-21 01:52:43,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:52:43,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:52:43,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:52:43,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:52:43,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43" (1/1) ... [2021-11-21 01:52:43,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43" (1/1) ... [2021-11-21 01:52:43,872 INFO L137 Inliner]: procedures = 382, calls = 4296, calls flagged for inlining = 180, calls inlined = 177, statements flattened = 8043 [2021-11-21 01:52:43,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:52:43,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:52:43,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:52:43,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:52:43,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43" (1/1) ... [2021-11-21 01:52:43,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43" (1/1) ... [2021-11-21 01:52:43,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43" (1/1) ... [2021-11-21 01:52:43,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43" (1/1) ... [2021-11-21 01:52:44,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43" (1/1) ... [2021-11-21 01:52:44,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43" (1/1) ... [2021-11-21 01:52:44,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43" (1/1) ... [2021-11-21 01:52:44,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:52:44,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:52:44,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:52:44,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:52:44,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43" (1/1) ... [2021-11-21 01:52:44,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:52:44,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:52:44,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:52:44,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:52:44,551 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_ioread8 [2021-11-21 01:52:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_ioread8 [2021-11-21 01:52:44,551 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_12 [2021-11-21 01:52:44,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_12 [2021-11-21 01:52:44,551 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_frequency_to_channel [2021-11-21 01:52:44,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_frequency_to_channel [2021-11-21 01:52:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-21 01:52:44,552 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-21 01:52:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure write_sa2400 [2021-11-21 01:52:44,552 INFO L138 BoogieDeclarations]: Found implementation of procedure write_sa2400 [2021-11-21 01:52:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_free_tx_ring [2021-11-21 01:52:44,553 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_free_tx_ring [2021-11-21 01:52:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_iowrite8 [2021-11-21 01:52:44,553 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_iowrite8 [2021-11-21 01:52:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:52:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:52:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_conf_tx [2021-11-21 01:52:44,554 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_conf_tx [2021-11-21 01:52:44,554 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-21 01:52:44,554 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-21 01:52:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:52:44,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:52:44,555 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_stop [2021-11-21 01:52:44,555 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_stop [2021-11-21 01:52:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-21 01:52:44,556 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-21 01:52:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_5 [2021-11-21 01:52:44,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_5 [2021-11-21 01:52:44,556 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_4 [2021-11-21 01:52:44,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_4 [2021-11-21 01:52:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_3 [2021-11-21 01:52:44,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_3 [2021-11-21 01:52:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:52:44,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:52:44,557 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_init [2021-11-21 01:52:44,557 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_init [2021-11-21 01:52:44,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_8 [2021-11-21 01:52:44,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_8 [2021-11-21 01:52:44,558 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_init [2021-11-21 01:52:44,558 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_init [2021-11-21 01:52:44,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_7 [2021-11-21 01:52:44,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_7 [2021-11-21 01:52:44,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_6 [2021-11-21 01:52:44,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_6 [2021-11-21 01:52:44,559 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_calc_rssi [2021-11-21 01:52:44,560 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_calc_rssi [2021-11-21 01:52:44,560 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225z2_rf_init [2021-11-21 01:52:44,560 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225z2_rf_init [2021-11-21 01:52:44,560 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_remove [2021-11-21 01:52:44,561 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_remove [2021-11-21 01:52:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225se_rf_set_channel [2021-11-21 01:52:44,562 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225se_rf_set_channel [2021-11-21 01:52:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-21 01:52:44,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-21 01:52:44,562 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8187se_rf_writereg [2021-11-21 01:52:44,563 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8187se_rf_writereg [2021-11-21 01:52:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure usleep_range [2021-11-21 01:52:44,563 INFO L138 BoogieDeclarations]: Found implementation of procedure usleep_range [2021-11-21 01:52:44,563 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_generic_frame_duration [2021-11-21 01:52:44,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_generic_frame_duration [2021-11-21 01:52:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-21 01:52:44,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-21 01:52:44,564 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-21 01:52:44,565 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-21 01:52:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-21 01:52:44,565 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-21 01:52:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_stop [2021-11-21 01:52:44,565 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_stop [2021-11-21 01:52:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:52:44,565 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:52:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_2 [2021-11-21 01:52:44,566 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_2 [2021-11-21 01:52:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:52:44,566 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:52:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure fls [2021-11-21 01:52:44,566 INFO L138 BoogieDeclarations]: Found implementation of procedure fls [2021-11-21 01:52:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_int_disable [2021-11-21 01:52:44,567 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_int_disable [2021-11-21 01:52:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-21 01:52:44,567 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-21 01:52:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-21 01:52:44,567 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-21 01:52:44,567 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-21 01:52:44,568 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-21 01:52:44,568 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_write [2021-11-21 01:52:44,569 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_write [2021-11-21 01:52:44,569 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_write_phy_antenna [2021-11-21 01:52:44,569 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_write_phy_antenna [2021-11-21 01:52:44,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:52:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_init [2021-11-21 01:52:44,570 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_init [2021-11-21 01:52:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_write_phy_antenna [2021-11-21 01:52:44,571 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_write_phy_antenna [2021-11-21 01:52:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_ioread32 [2021-11-21 01:52:44,571 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_ioread32 [2021-11-21 01:52:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:52:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225se_rf_stop [2021-11-21 01:52:44,572 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225se_rf_stop [2021-11-21 01:52:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-21 01:52:44,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-21 01:52:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_free_rx_ring [2021-11-21 01:52:44,572 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_free_rx_ring [2021-11-21 01:52:44,573 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_bss_info_changed [2021-11-21 01:52:44,573 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_bss_info_changed [2021-11-21 01:52:44,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-21 01:52:44,573 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_rf_calc_rssi [2021-11-21 01:52:44,573 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_rf_calc_rssi [2021-11-21 01:52:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-21 01:52:44,574 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-21 01:52:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-21 01:52:44,575 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-21 01:52:44,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:52:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:52:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225z2_rf_set_tx_power [2021-11-21 01:52:44,578 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225z2_rf_set_tx_power [2021-11-21 01:52:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_rf_init [2021-11-21 01:52:44,579 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_rf_init [2021-11-21 01:52:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_ioread16 [2021-11-21 01:52:44,581 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_ioread16 [2021-11-21 01:52:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-21 01:52:44,581 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-21 01:52:44,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___skb_dequeue_14 [2021-11-21 01:52:44,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___skb_dequeue_14 [2021-11-21 01:52:44,588 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-21 01:52:44,588 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-21 01:52:44,588 INFO L130 BoogieDeclarations]: Found specification of procedure write_max2820 [2021-11-21 01:52:44,588 INFO L138 BoogieDeclarations]: Found implementation of procedure write_max2820 [2021-11-21 01:52:44,589 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_set_anaparam [2021-11-21 01:52:44,589 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_set_anaparam [2021-11-21 01:52:44,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:52:44,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-21 01:52:44,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-21 01:52:44,589 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_get_tx_rate [2021-11-21 01:52:44,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_get_tx_rate [2021-11-21 01:52:44,590 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-21 01:52:44,590 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-21 01:52:44,590 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-21 01:52:44,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-21 01:52:44,590 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_stop [2021-11-21 01:52:44,590 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_stop [2021-11-21 01:52:44,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:52:44,591 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_stop [2021-11-21 01:52:44,591 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_stop [2021-11-21 01:52:44,591 INFO L130 BoogieDeclarations]: Found specification of procedure write_grf5101 [2021-11-21 01:52:44,591 INFO L138 BoogieDeclarations]: Found implementation of procedure write_grf5101 [2021-11-21 01:52:44,591 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8187se_rf_readreg [2021-11-21 01:52:44,591 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8187se_rf_readreg [2021-11-21 01:52:44,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:52:44,592 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-21 01:52:44,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-21 01:52:44,593 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_remove_interface [2021-11-21 01:52:44,593 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_remove_interface [2021-11-21 01:52:44,593 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_get_tsf [2021-11-21 01:52:44,593 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_get_tsf [2021-11-21 01:52:44,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 01:52:44,593 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 01:52:44,593 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2021-11-21 01:52:44,594 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2021-11-21 01:52:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-21 01:52:44,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-21 01:52:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_read [2021-11-21 01:52:44,594 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_read [2021-11-21 01:52:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_handle_rx [2021-11-21 01:52:44,594 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_handle_rx [2021-11-21 01:52:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_2 [2021-11-21 01:52:44,595 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_2 [2021-11-21 01:52:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iomap [2021-11-21 01:52:44,595 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iomap [2021-11-21 01:52:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_add_interface [2021-11-21 01:52:44,595 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_add_interface [2021-11-21 01:52:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_set_channel [2021-11-21 01:52:44,596 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_set_channel [2021-11-21 01:52:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_write_phy_antenna [2021-11-21 01:52:44,596 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_write_phy_antenna [2021-11-21 01:52:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-21 01:52:44,596 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-21 01:52:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:52:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-21 01:52:44,597 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-21 01:52:44,597 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_set_channel [2021-11-21 01:52:44,597 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_set_channel [2021-11-21 01:52:44,597 INFO L130 BoogieDeclarations]: Found specification of procedure eeprom_93cx6_read [2021-11-21 01:52:44,597 INFO L138 BoogieDeclarations]: Found implementation of procedure eeprom_93cx6_read [2021-11-21 01:52:44,597 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_rf_set_tx_power [2021-11-21 01:52:44,597 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_rf_set_tx_power [2021-11-21 01:52:44,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:52:44,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:52:44,598 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_handle_tx [2021-11-21 01:52:44,598 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_handle_tx [2021-11-21 01:52:44,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2021-11-21 01:52:44,598 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_configure_filter [2021-11-21 01:52:44,598 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_configure_filter [2021-11-21 01:52:44,599 INFO L130 BoogieDeclarations]: Found specification of procedure sa2400_rf_set_channel [2021-11-21 01:52:44,599 INFO L138 BoogieDeclarations]: Found implementation of procedure sa2400_rf_set_channel [2021-11-21 01:52:44,599 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8187se_conf_ac_parm [2021-11-21 01:52:44,599 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8187se_conf_ac_parm [2021-11-21 01:52:44,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:52:44,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:52:44,599 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-21 01:52:44,600 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-21 01:52:44,600 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_free_hw [2021-11-21 01:52:44,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_free_hw [2021-11-21 01:52:44,600 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_write_phy_cck [2021-11-21 01:52:44,600 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_write_phy_cck [2021-11-21 01:52:44,600 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 01:52:44,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 01:52:44,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:52:44,601 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-21 01:52:44,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-21 01:52:44,601 INFO L130 BoogieDeclarations]: Found specification of procedure IEEE80211_SKB_RXCB [2021-11-21 01:52:44,601 INFO L138 BoogieDeclarations]: Found implementation of procedure IEEE80211_SKB_RXCB [2021-11-21 01:52:44,601 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 01:52:44,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 01:52:44,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2021-11-21 01:52:44,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2021-11-21 01:52:44,602 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_get_rts_cts_rate [2021-11-21 01:52:44,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_get_rts_cts_rate [2021-11-21 01:52:44,602 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_rf_stop [2021-11-21 01:52:44,602 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_rf_stop [2021-11-21 01:52:44,602 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_len [2021-11-21 01:52:44,603 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_len [2021-11-21 01:52:44,603 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225se_rf_init [2021-11-21 01:52:44,603 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225se_rf_init [2021-11-21 01:52:44,603 INFO L130 BoogieDeclarations]: Found specification of procedure grf5101_rf_set_channel [2021-11-21 01:52:44,603 INFO L138 BoogieDeclarations]: Found implementation of procedure grf5101_rf_set_channel [2021-11-21 01:52:44,603 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_prepare_multicast [2021-11-21 01:52:44,603 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_prepare_multicast [2021-11-21 01:52:44,604 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-21 01:52:44,604 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-21 01:52:44,604 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-21 01:52:44,604 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-21 01:52:44,604 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-21 01:52:44,604 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-21 01:52:44,604 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_iowrite32 [2021-11-21 01:52:44,605 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_iowrite32 [2021-11-21 01:52:44,605 INFO L130 BoogieDeclarations]: Found specification of procedure eeprom_93cx6_multiread [2021-11-21 01:52:44,605 INFO L138 BoogieDeclarations]: Found implementation of procedure eeprom_93cx6_multiread [2021-11-21 01:52:44,605 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_set_anaparam2 [2021-11-21 01:52:44,606 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_set_anaparam2 [2021-11-21 01:52:44,610 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8225_write_phy_ofdm [2021-11-21 01:52:44,610 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8225_write_phy_ofdm [2021-11-21 01:52:44,610 INFO L130 BoogieDeclarations]: Found specification of procedure max2820_rf_calc_rssi [2021-11-21 01:52:44,610 INFO L138 BoogieDeclarations]: Found implementation of procedure max2820_rf_calc_rssi [2021-11-21 01:52:44,610 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_write_phy [2021-11-21 01:52:44,610 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_write_phy [2021-11-21 01:52:44,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:52:44,611 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_config [2021-11-21 01:52:44,611 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_config [2021-11-21 01:52:44,611 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8187se_three_wire_io [2021-11-21 01:52:44,612 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8187se_three_wire_io [2021-11-21 01:52:44,612 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_conf_basic_rates [2021-11-21 01:52:44,612 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_conf_basic_rates [2021-11-21 01:52:44,612 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8180_tx [2021-11-21 01:52:44,612 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8180_tx [2021-11-21 01:52:44,613 INFO L130 BoogieDeclarations]: Found specification of procedure rtl818x_iowrite16 [2021-11-21 01:52:44,613 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl818x_iowrite16 [2021-11-21 01:52:44,613 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-11-21 01:52:44,613 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-11-21 01:52:44,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2021-11-21 01:52:44,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:52:44,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:52:44,614 INFO L130 BoogieDeclarations]: Found specification of procedure IEEE80211_SKB_CB [2021-11-21 01:52:44,614 INFO L138 BoogieDeclarations]: Found implementation of procedure IEEE80211_SKB_CB [2021-11-21 01:52:45,711 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:52:45,716 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:52:46,062 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:52:54,513 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:52:56,363 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:52:56,363 INFO L301 CfgBuilder]: Removed 81 assume(true) statements. [2021-11-21 01:52:56,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:52:56 BoogieIcfgContainer [2021-11-21 01:52:56,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:52:56,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:52:56,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:52:56,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:52:56,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:52:39" (1/3) ... [2021-11-21 01:52:56,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b91402a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:52:56, skipping insertion in model container [2021-11-21 01:52:56,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:52:43" (2/3) ... [2021-11-21 01:52:56,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b91402a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:52:56, skipping insertion in model container [2021-11-21 01:52:56,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:52:56" (3/3) ... [2021-11-21 01:52:56,383 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rtl818x--rtl8180--rtl818x_pci.ko-entry_point.cil.out.i [2021-11-21 01:52:56,389 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:52:56,389 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:52:56,466 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:52:56,473 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:52:56,474 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:52:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 3174 states, 1626 states have (on average 1.3105781057810577) internal successors, (2131), 1781 states have internal predecessors, (2131), 1503 states have call successors, (1503), 122 states have call predecessors, (1503), 121 states have return successors, (1489), 1454 states have call predecessors, (1489), 1489 states have call successors, (1489) [2021-11-21 01:52:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 01:52:56,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:56,599 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-11-21 01:52:56,600 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:52:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:56,605 INFO L85 PathProgramCache]: Analyzing trace with hash 540936489, now seen corresponding path program 1 times [2021-11-21 01:52:56,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:56,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283173776] [2021-11-21 01:52:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:56,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:52:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:52:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-21 01:52:57,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:52:57,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283173776] [2021-11-21 01:52:57,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283173776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:52:57,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:52:57,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:52:57,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351013574] [2021-11-21 01:52:57,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:52:57,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:52:57,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:52:57,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:52:57,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:52:57,649 INFO L87 Difference]: Start difference. First operand has 3174 states, 1626 states have (on average 1.3105781057810577) internal successors, (2131), 1781 states have internal predecessors, (2131), 1503 states have call successors, (1503), 122 states have call predecessors, (1503), 121 states have return successors, (1489), 1454 states have call predecessors, (1489), 1489 states have call successors, (1489) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-21 01:53:01,658 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:53:04,311 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:05,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:05,227 INFO L93 Difference]: Finished difference Result 8979 states and 14569 transitions. [2021-11-21 01:53:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:53:05,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 70 [2021-11-21 01:53:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:05,332 INFO L225 Difference]: With dead ends: 8979 [2021-11-21 01:53:05,333 INFO L226 Difference]: Without dead ends: 5786 [2021-11-21 01:53:05,375 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:53:05,382 INFO L933 BasicCegarLoop]: 5810 mSDtfsCounter, 4557 mSDsluCounter, 4638 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4560 SdHoareTripleChecker+Valid, 10219 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:05,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4560 Valid, 10219 Invalid, 484 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 473 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2021-11-21 01:53:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-11-21 01:53:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 5785. [2021-11-21 01:53:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5785 states, 2745 states have (on average 1.2932604735883424) internal successors, (3550), 2886 states have internal predecessors, (3550), 2799 states have call successors, (2799), 241 states have call predecessors, (2799), 240 states have return successors, (2801), 2727 states have call predecessors, (2801), 2798 states have call successors, (2801) [2021-11-21 01:53:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5785 states to 5785 states and 9150 transitions. [2021-11-21 01:53:06,312 INFO L78 Accepts]: Start accepts. Automaton has 5785 states and 9150 transitions. Word has length 70 [2021-11-21 01:53:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:06,313 INFO L470 AbstractCegarLoop]: Abstraction has 5785 states and 9150 transitions. [2021-11-21 01:53:06,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-21 01:53:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5785 states and 9150 transitions. [2021-11-21 01:53:06,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:53:06,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:06,322 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-11-21 01:53:06,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:53:06,323 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:53:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:06,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1939261110, now seen corresponding path program 1 times [2021-11-21 01:53:06,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:06,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830835166] [2021-11-21 01:53:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:06,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-21 01:53:06,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:06,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830835166] [2021-11-21 01:53:06,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830835166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:06,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:53:06,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:53:06,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808999230] [2021-11-21 01:53:06,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:06,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:53:06,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:53:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:53:06,983 INFO L87 Difference]: Start difference. First operand 5785 states and 9150 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 01:53:09,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:10,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:14,724 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:53:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:15,955 INFO L93 Difference]: Finished difference Result 11542 states and 18338 transitions. [2021-11-21 01:53:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:53:15,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2021-11-21 01:53:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:16,112 INFO L225 Difference]: With dead ends: 11542 [2021-11-21 01:53:16,112 INFO L226 Difference]: Without dead ends: 11537 [2021-11-21 01:53:16,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:16,128 INFO L933 BasicCegarLoop]: 6158 mSDtfsCounter, 4571 mSDsluCounter, 11029 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4571 SdHoareTripleChecker+Valid, 16706 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:16,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4571 Valid, 16706 Invalid, 768 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 766 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2021-11-21 01:53:16,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2021-11-21 01:53:17,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 11528. [2021-11-21 01:53:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11528 states, 5463 states have (on average 1.2936115687351273) internal successors, (7067), 5746 states have internal predecessors, (7067), 5584 states have call successors, (5584), 481 states have call predecessors, (5584), 480 states have return successors, (5669), 5440 states have call predecessors, (5669), 5583 states have call successors, (5669) [2021-11-21 01:53:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11528 states to 11528 states and 18320 transitions. [2021-11-21 01:53:17,543 INFO L78 Accepts]: Start accepts. Automaton has 11528 states and 18320 transitions. Word has length 73 [2021-11-21 01:53:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:17,545 INFO L470 AbstractCegarLoop]: Abstraction has 11528 states and 18320 transitions. [2021-11-21 01:53:17,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 01:53:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 11528 states and 18320 transitions. [2021-11-21 01:53:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-21 01:53:17,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:17,566 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2021-11-21 01:53:17,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:53:17,566 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:53:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:17,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1057543957, now seen corresponding path program 1 times [2021-11-21 01:53:17,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:17,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312846923] [2021-11-21 01:53:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:17,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-21 01:53:17,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312846923] [2021-11-21 01:53:17,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312846923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:17,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:53:17,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:53:17,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847061554] [2021-11-21 01:53:17,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:17,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:53:17,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:53:17,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:53:17,998 INFO L87 Difference]: Start difference. First operand 11528 states and 18320 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2021-11-21 01:53:21,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:24,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:53:24,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:24,703 INFO L93 Difference]: Finished difference Result 31602 states and 50406 transitions. [2021-11-21 01:53:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:53:24,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 130 [2021-11-21 01:53:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:24,933 INFO L225 Difference]: With dead ends: 31602 [2021-11-21 01:53:24,933 INFO L226 Difference]: Without dead ends: 20093 [2021-11-21 01:53:25,058 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:53:25,062 INFO L933 BasicCegarLoop]: 5493 mSDtfsCounter, 3461 mSDsluCounter, 4520 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 9788 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:25,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3461 Valid, 9788 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 519 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-21 01:53:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20093 states. [2021-11-21 01:53:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20093 to 20086. [2021-11-21 01:53:27,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20086 states, 9203 states have (on average 1.2953384765837228) internal successors, (11921), 9652 states have internal predecessors, (11921), 10026 states have call successors, (10026), 857 states have call predecessors, (10026), 856 states have return successors, (10157), 9824 states have call predecessors, (10157), 10025 states have call successors, (10157) [2021-11-21 01:53:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20086 states to 20086 states and 32104 transitions. [2021-11-21 01:53:27,509 INFO L78 Accepts]: Start accepts. Automaton has 20086 states and 32104 transitions. Word has length 130 [2021-11-21 01:53:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:27,510 INFO L470 AbstractCegarLoop]: Abstraction has 20086 states and 32104 transitions. [2021-11-21 01:53:27,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2021-11-21 01:53:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 20086 states and 32104 transitions. [2021-11-21 01:53:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-21 01:53:27,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:27,534 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 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] [2021-11-21 01:53:27,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:53:27,535 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:53:27,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash -389926971, now seen corresponding path program 1 times [2021-11-21 01:53:27,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:27,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258463627] [2021-11-21 01:53:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:27,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:27,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:53:27,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045135712] [2021-11-21 01:53:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:27,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:53:27,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:53:27,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:53:27,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:53:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 4722 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:53:29,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:53:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-21 01:53:29,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:53:29,785 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:29,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258463627] [2021-11-21 01:53:29,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:53:29,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045135712] [2021-11-21 01:53:29,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045135712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:29,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:53:29,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:53:29,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939979904] [2021-11-21 01:53:29,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:29,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:53:29,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:53:29,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:29,789 INFO L87 Difference]: Start difference. First operand 20086 states and 32104 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:53:35,486 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:37,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:41,041 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:53:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:53:46,638 INFO L93 Difference]: Finished difference Result 60191 states and 96248 transitions. [2021-11-21 01:53:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:53:46,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 153 [2021-11-21 01:53:46,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:53:47,085 INFO L225 Difference]: With dead ends: 60191 [2021-11-21 01:53:47,085 INFO L226 Difference]: Without dead ends: 40124 [2021-11-21 01:53:47,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:53:47,236 INFO L933 BasicCegarLoop]: 5773 mSDtfsCounter, 4486 mSDsluCounter, 11001 mSDsCounter, 0 mSdLazyCounter, 6550 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4495 SdHoareTripleChecker+Valid, 16091 SdHoareTripleChecker+Invalid, 6567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 6550 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:53:47,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4495 Valid, 16091 Invalid, 6567 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 6550 Invalid, 2 Unknown, 0 Unchecked, 15.2s Time] [2021-11-21 01:53:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40124 states. [2021-11-21 01:53:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40124 to 40102. [2021-11-21 01:53:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40102 states, 18371 states have (on average 1.2958467149311415) internal successors, (23806), 19270 states have internal predecessors, (23806), 20014 states have call successors, (20014), 1709 states have call predecessors, (20014), 1716 states have return successors, (20311), 19610 states have call predecessors, (20311), 20013 states have call successors, (20311) [2021-11-21 01:53:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40102 states to 40102 states and 64131 transitions. [2021-11-21 01:53:51,421 INFO L78 Accepts]: Start accepts. Automaton has 40102 states and 64131 transitions. Word has length 153 [2021-11-21 01:53:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:53:51,422 INFO L470 AbstractCegarLoop]: Abstraction has 40102 states and 64131 transitions. [2021-11-21 01:53:51,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:53:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 40102 states and 64131 transitions. [2021-11-21 01:53:51,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-21 01:53:51,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:53:51,438 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 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] [2021-11-21 01:53:51,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:53:51,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:53:51,666 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:53:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:53:51,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2054849153, now seen corresponding path program 1 times [2021-11-21 01:53:51,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:53:51,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950849205] [2021-11-21 01:53:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:51,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:51,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:53:51,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439223005] [2021-11-21 01:53:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:53:51,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:53:51,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:53:51,829 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:53:51,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:53:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:53:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 4724 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:53:53,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:53:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-21 01:53:54,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:53:54,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:53:54,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950849205] [2021-11-21 01:53:54,138 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:53:54,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439223005] [2021-11-21 01:53:54,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439223005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:53:54,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:53:54,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:53:54,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669776244] [2021-11-21 01:53:54,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:53:54,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:53:54,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:53:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:53:54,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:53:54,141 INFO L87 Difference]: Start difference. First operand 40102 states and 64131 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:54:00,556 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:01,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:04,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:54:07,333 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:09,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:54:15,847 INFO L93 Difference]: Finished difference Result 80271 states and 128327 transitions. [2021-11-21 01:54:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:54:15,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 154 [2021-11-21 01:54:15,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:54:16,162 INFO L225 Difference]: With dead ends: 80271 [2021-11-21 01:54:16,163 INFO L226 Difference]: Without dead ends: 40188 [2021-11-21 01:54:16,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:54:16,541 INFO L933 BasicCegarLoop]: 5793 mSDtfsCounter, 4498 mSDsluCounter, 11029 mSDsCounter, 0 mSdLazyCounter, 6566 mSolverCounterSat, 15 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4505 SdHoareTripleChecker+Valid, 16135 SdHoareTripleChecker+Invalid, 6585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 6566 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:54:16,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4505 Valid, 16135 Invalid, 6585 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 6566 Invalid, 4 Unknown, 0 Unchecked, 19.6s Time] [2021-11-21 01:54:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40188 states. [2021-11-21 01:54:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40188 to 40162. [2021-11-21 01:54:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40162 states, 18403 states have (on average 1.2953322827799816) internal successors, (23838), 19302 states have internal predecessors, (23838), 20030 states have call successors, (20030), 1721 states have call predecessors, (20030), 1728 states have return successors, (20307), 19626 states have call predecessors, (20307), 20029 states have call successors, (20307) [2021-11-21 01:54:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40162 states to 40162 states and 64175 transitions. [2021-11-21 01:54:20,240 INFO L78 Accepts]: Start accepts. Automaton has 40162 states and 64175 transitions. Word has length 154 [2021-11-21 01:54:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:54:20,243 INFO L470 AbstractCegarLoop]: Abstraction has 40162 states and 64175 transitions. [2021-11-21 01:54:20,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:54:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 40162 states and 64175 transitions. [2021-11-21 01:54:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-21 01:54:20,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:54:20,265 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 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] [2021-11-21 01:54:20,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:54:20,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:54:20,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:54:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:54:20,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1365914298, now seen corresponding path program 1 times [2021-11-21 01:54:20,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:54:20,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983379334] [2021-11-21 01:54:20,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:20,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:54:21,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:54:21,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339306706] [2021-11-21 01:54:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:21,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:54:21,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:54:21,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:54:21,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:54:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:22,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 4720 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:54:22,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:54:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-21 01:54:23,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:54:23,188 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:54:23,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983379334] [2021-11-21 01:54:23,188 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:54:23,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339306706] [2021-11-21 01:54:23,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339306706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:54:23,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:54:23,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:54:23,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507833064] [2021-11-21 01:54:23,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:54:23,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:54:23,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:54:23,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:54:23,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:54:23,191 INFO L87 Difference]: Start difference. First operand 40162 states and 64175 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:54:28,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:32,459 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:54:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:54:40,094 INFO L93 Difference]: Finished difference Result 80331 states and 128359 transitions. [2021-11-21 01:54:40,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:54:40,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 152 [2021-11-21 01:54:40,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:54:40,333 INFO L225 Difference]: With dead ends: 80331 [2021-11-21 01:54:40,333 INFO L226 Difference]: Without dead ends: 40188 [2021-11-21 01:54:40,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:54:40,563 INFO L933 BasicCegarLoop]: 5789 mSDtfsCounter, 4487 mSDsluCounter, 9564 mSDsCounter, 0 mSdLazyCounter, 6540 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4496 SdHoareTripleChecker+Valid, 14674 SdHoareTripleChecker+Invalid, 6557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 6540 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:54:40,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4496 Valid, 14674 Invalid, 6557 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 6540 Invalid, 2 Unknown, 0 Unchecked, 14.5s Time] [2021-11-21 01:54:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40188 states. [2021-11-21 01:54:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40188 to 40162. [2021-11-21 01:54:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40162 states, 18403 states have (on average 1.2953322827799816) internal successors, (23838), 19302 states have internal predecessors, (23838), 20030 states have call successors, (20030), 1721 states have call predecessors, (20030), 1728 states have return successors, (20295), 19626 states have call predecessors, (20295), 20029 states have call successors, (20295) [2021-11-21 01:54:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40162 states to 40162 states and 64163 transitions. [2021-11-21 01:54:43,881 INFO L78 Accepts]: Start accepts. Automaton has 40162 states and 64163 transitions. Word has length 152 [2021-11-21 01:54:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:54:43,882 INFO L470 AbstractCegarLoop]: Abstraction has 40162 states and 64163 transitions. [2021-11-21 01:54:43,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:54:43,882 INFO L276 IsEmpty]: Start isEmpty. Operand 40162 states and 64163 transitions. [2021-11-21 01:54:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-21 01:54:43,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:54:43,900 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 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] [2021-11-21 01:54:43,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:54:44,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:54:44,114 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:54:44,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:54:44,115 INFO L85 PathProgramCache]: Analyzing trace with hash 66759724, now seen corresponding path program 1 times [2021-11-21 01:54:44,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:54:44,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089352717] [2021-11-21 01:54:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:44,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:54:44,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:54:44,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913798293] [2021-11-21 01:54:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:54:44,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:54:44,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:54:44,273 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:54:44,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:54:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:54:45,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 4718 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:54:45,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:54:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-21 01:54:46,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:54:46,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:54:46,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089352717] [2021-11-21 01:54:46,313 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:54:46,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913798293] [2021-11-21 01:54:46,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913798293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:54:46,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:54:46,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:54:46,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367824282] [2021-11-21 01:54:46,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:54:46,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:54:46,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:54:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:54:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:54:46,317 INFO L87 Difference]: Start difference. First operand 40162 states and 64163 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:54:52,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:56,951 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:55:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:03,555 INFO L93 Difference]: Finished difference Result 100343 states and 160330 transitions. [2021-11-21 01:55:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:55:03,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 151 [2021-11-21 01:55:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:03,919 INFO L225 Difference]: With dead ends: 100343 [2021-11-21 01:55:03,920 INFO L226 Difference]: Without dead ends: 60024 [2021-11-21 01:55:04,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:55:04,136 INFO L933 BasicCegarLoop]: 6382 mSDtfsCounter, 4484 mSDsluCounter, 10207 mSDsCounter, 0 mSdLazyCounter, 6671 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4493 SdHoareTripleChecker+Valid, 15848 SdHoareTripleChecker+Invalid, 6688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 6671 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:04,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4493 Valid, 15848 Invalid, 6688 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 6671 Invalid, 2 Unknown, 0 Unchecked, 14.3s Time] [2021-11-21 01:55:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60024 states. [2021-11-21 01:55:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60024 to 59970. [2021-11-21 01:55:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59970 states, 27443 states have (on average 1.295594504973946) internal successors, (35555), 28792 states have internal predecessors, (35555), 29954 states have call successors, (29954), 2565 states have call predecessors, (29954), 2572 states have return successors, (30337), 29316 states have call predecessors, (30337), 29953 states have call successors, (30337) [2021-11-21 01:55:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59970 states to 59970 states and 95846 transitions. [2021-11-21 01:55:08,814 INFO L78 Accepts]: Start accepts. Automaton has 59970 states and 95846 transitions. Word has length 151 [2021-11-21 01:55:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:08,815 INFO L470 AbstractCegarLoop]: Abstraction has 59970 states and 95846 transitions. [2021-11-21 01:55:08,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:55:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 59970 states and 95846 transitions. [2021-11-21 01:55:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-21 01:55:08,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:08,855 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2021-11-21 01:55:08,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 01:55:09,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:55:09,082 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:09,083 INFO L85 PathProgramCache]: Analyzing trace with hash -704273074, now seen corresponding path program 1 times [2021-11-21 01:55:09,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:09,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994913701] [2021-11-21 01:55:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:09,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:09,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:09,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994913701] [2021-11-21 01:55:09,397 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-21 01:55:09,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948055722] [2021-11-21 01:55:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:09,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:09,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:09,398 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:09,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:55:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:10,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 4767 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:55:10,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-21 01:55:11,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:55:11,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948055722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:11,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:11,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:55:11,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276625345] [2021-11-21 01:55:11,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:11,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:55:11,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:11,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:55:11,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:55:11,190 INFO L87 Difference]: Start difference. First operand 59970 states and 95846 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 01:55:17,246 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:21,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:55:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:29,368 INFO L93 Difference]: Finished difference Result 120015 states and 191829 transitions. [2021-11-21 01:55:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:55:29,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 168 [2021-11-21 01:55:29,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:29,898 INFO L225 Difference]: With dead ends: 120015 [2021-11-21 01:55:29,899 INFO L226 Difference]: Without dead ends: 60064 [2021-11-21 01:55:30,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:55:30,143 INFO L933 BasicCegarLoop]: 4358 mSDtfsCounter, 4527 mSDsluCounter, 3522 mSDsCounter, 0 mSdLazyCounter, 6312 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4536 SdHoareTripleChecker+Valid, 7420 SdHoareTripleChecker+Invalid, 6342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 6312 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:30,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4536 Valid, 7420 Invalid, 6342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 6312 Invalid, 2 Unknown, 0 Unchecked, 14.9s Time] [2021-11-21 01:55:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60064 states. [2021-11-21 01:55:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60064 to 60056. [2021-11-21 01:55:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60056 states, 27486 states have (on average 1.2951320672342284) internal successors, (35598), 28864 states have internal predecessors, (35598), 29954 states have call successors, (29954), 2579 states have call predecessors, (29954), 2615 states have return successors, (30411), 29316 states have call predecessors, (30411), 29953 states have call successors, (30411) [2021-11-21 01:55:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60056 states to 60056 states and 95963 transitions. [2021-11-21 01:55:34,860 INFO L78 Accepts]: Start accepts. Automaton has 60056 states and 95963 transitions. Word has length 168 [2021-11-21 01:55:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:34,861 INFO L470 AbstractCegarLoop]: Abstraction has 60056 states and 95963 transitions. [2021-11-21 01:55:34,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 01:55:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 60056 states and 95963 transitions. [2021-11-21 01:55:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-21 01:55:34,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:34,895 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2021-11-21 01:55:34,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:55:35,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:35,110 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:35,111 INFO L85 PathProgramCache]: Analyzing trace with hash -679863575, now seen corresponding path program 1 times [2021-11-21 01:55:35,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:35,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233197384] [2021-11-21 01:55:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:35,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:35,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:35,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233197384] [2021-11-21 01:55:35,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-21 01:55:35,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916235073] [2021-11-21 01:55:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:35,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:35,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:35,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:35,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:55:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 4769 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:55:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-21 01:55:37,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:55:37,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916235073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:37,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:37,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:55:37,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148671507] [2021-11-21 01:55:37,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:37,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:55:37,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:37,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:55:37,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:55:37,174 INFO L87 Difference]: Start difference. First operand 60056 states and 95963 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 01:55:42,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:44,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:46,307 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:50,459 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:55:59,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:59,365 INFO L93 Difference]: Finished difference Result 120095 states and 191899 transitions. [2021-11-21 01:55:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:55:59,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 169 [2021-11-21 01:55:59,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:59,728 INFO L225 Difference]: With dead ends: 120095 [2021-11-21 01:55:59,728 INFO L226 Difference]: Without dead ends: 60058 [2021-11-21 01:55:59,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:55:59,979 INFO L933 BasicCegarLoop]: 4358 mSDtfsCounter, 4491 mSDsluCounter, 3545 mSDsCounter, 0 mSdLazyCounter, 6327 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4498 SdHoareTripleChecker+Valid, 7441 SdHoareTripleChecker+Invalid, 6357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 6327 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:59,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4498 Valid, 7441 Invalid, 6357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 6327 Invalid, 2 Unknown, 0 Unchecked, 18.6s Time] [2021-11-21 01:56:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60058 states. [2021-11-21 01:56:04,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60058 to 60058. [2021-11-21 01:56:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60058 states, 27487 states have (on average 1.2951213300833122) internal successors, (35599), 28865 states have internal predecessors, (35599), 29954 states have call successors, (29954), 2580 states have call predecessors, (29954), 2616 states have return successors, (30375), 29316 states have call predecessors, (30375), 29953 states have call successors, (30375) [2021-11-21 01:56:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60058 states to 60058 states and 95928 transitions. [2021-11-21 01:56:05,433 INFO L78 Accepts]: Start accepts. Automaton has 60058 states and 95928 transitions. Word has length 169 [2021-11-21 01:56:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:05,434 INFO L470 AbstractCegarLoop]: Abstraction has 60058 states and 95928 transitions. [2021-11-21 01:56:05,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 01:56:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 60058 states and 95928 transitions. [2021-11-21 01:56:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-21 01:56:05,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:05,465 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2021-11-21 01:56:05,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:05,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:05,690 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:56:05,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1732775606, now seen corresponding path program 1 times [2021-11-21 01:56:05,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:05,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486090336] [2021-11-21 01:56:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:05,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:06,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:06,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486090336] [2021-11-21 01:56:06,006 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-21 01:56:06,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857253256] [2021-11-21 01:56:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:06,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:06,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:56:06,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:56:06,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c98cba-2079-47ce-92cb-35ef9a1f364b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:56:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:07,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 4765 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:56:07,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-21 01:56:08,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:56:08,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857253256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:08,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:08,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:56:08,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984218296] [2021-11-21 01:56:08,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:08,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:56:08,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:56:08,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:56:08,059 INFO L87 Difference]: Start difference. First operand 60058 states and 95928 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 01:56:15,357 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:20,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 01:56:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:29,869 INFO L93 Difference]: Finished difference Result 120105 states and 191840 transitions. [2021-11-21 01:56:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:56:29,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 167 [2021-11-21 01:56:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:30,184 INFO L225 Difference]: With dead ends: 120105 [2021-11-21 01:56:30,184 INFO L226 Difference]: Without dead ends: 60066 [2021-11-21 01:56:30,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:56:30,419 INFO L933 BasicCegarLoop]: 4358 mSDtfsCounter, 4480 mSDsluCounter, 3548 mSDsCounter, 0 mSdLazyCounter, 6307 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4489 SdHoareTripleChecker+Valid, 7445 SdHoareTripleChecker+Invalid, 6337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 6307 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:30,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4489 Valid, 7445 Invalid, 6337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 6307 Invalid, 2 Unknown, 0 Unchecked, 17.8s Time] [2021-11-21 01:56:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60066 states. [2021-11-21 01:56:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60066 to 60058. [2021-11-21 01:56:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60058 states, 27487 states have (on average 1.2951213300833122) internal successors, (35599), 28865 states have internal predecessors, (35599), 29954 states have call successors, (29954), 2580 states have call predecessors, (29954), 2616 states have return successors, (30339), 29316 states have call predecessors, (30339), 29953 states have call successors, (30339)