./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7 --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 d62cca735e5e5c3ed49d61d09e2b8d7696fac03708570c9e23afbb5bfdcaa275 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:54:47,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:54:47,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:54:48,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:54:48,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:54:48,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:54:48,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:54:48,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:54:48,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:54:48,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:54:48,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:54:48,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:54:48,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:54:48,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:54:48,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:54:48,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:54:48,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:54:48,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:54:48,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:54:48,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:54:48,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:54:48,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:54:48,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:54:48,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:54:48,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:54:48,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:54:48,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:54:48,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:54:48,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:54:48,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:54:48,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:54:48,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:54:48,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:54:48,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:54:48,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:54:48,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:54:48,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:54:48,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:54:48,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:54:48,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:54:48,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:54:48,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:54:48,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:54:48,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:54:48,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:54:48,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:54:48,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:54:48,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:54:48,156 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:54:48,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:54:48,156 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:54:48,156 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:54:48,157 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:54:48,158 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:54:48,158 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:54:48,158 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:54:48,159 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:54:48,159 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:54:48,159 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:54:48,159 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:54:48,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:54:48,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:54:48,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:54:48,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:54:48,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:54:48,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:54:48,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:54:48,162 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:54:48,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:54:48,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:54:48,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:54:48,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:54:48,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:54:48,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:54:48,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:54:48,166 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:54:48,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:54:48,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:54:48,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:54:48,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:54:48,167 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_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d62cca735e5e5c3ed49d61d09e2b8d7696fac03708570c9e23afbb5bfdcaa275 [2021-11-25 19:54:48,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:54:48,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:54:48,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:54:48,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:54:48,530 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:54:48,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-25 19:54:48,616 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/data/72574c6d6/c57c1497934c4a1cbabf165c48bb26e4/FLAG2aa76428b [2021-11-25 19:54:49,640 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:54:49,641 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-25 19:54:49,702 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/data/72574c6d6/c57c1497934c4a1cbabf165c48bb26e4/FLAG2aa76428b [2021-11-25 19:54:50,025 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/data/72574c6d6/c57c1497934c4a1cbabf165c48bb26e4 [2021-11-25 19:54:50,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:54:50,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:54:50,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:54:50,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:54:50,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:54:50,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:54:50" (1/1) ... [2021-11-25 19:54:50,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a3a264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:50, skipping insertion in model container [2021-11-25 19:54:50,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:54:50" (1/1) ... [2021-11-25 19:54:50,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:54:50,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:54:53,374 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_25cb301f-3892-4f2e-b2c3-070563f1ee96/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[361017,361030] [2021-11-25 19:54:53,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:54:53,607 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:54:54,112 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_25cb301f-3892-4f2e-b2c3-070563f1ee96/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[361017,361030] [2021-11-25 19:54:54,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:54:54,377 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:54:54,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54 WrapperNode [2021-11-25 19:54:54,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:54:54,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:54:54,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:54:54,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:54:54,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54" (1/1) ... [2021-11-25 19:54:54,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54" (1/1) ... [2021-11-25 19:54:54,935 INFO L137 Inliner]: procedures = 359, calls = 7215, calls flagged for inlining = 183, calls inlined = 137, statements flattened = 11745 [2021-11-25 19:54:54,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:54:54,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:54:54,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:54:54,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:54:54,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54" (1/1) ... [2021-11-25 19:54:54,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54" (1/1) ... [2021-11-25 19:54:55,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54" (1/1) ... [2021-11-25 19:54:55,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54" (1/1) ... [2021-11-25 19:54:55,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54" (1/1) ... [2021-11-25 19:54:55,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54" (1/1) ... [2021-11-25 19:54:55,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54" (1/1) ... [2021-11-25 19:54:55,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:54:55,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:54:55,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:54:55,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:54:55,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54" (1/1) ... [2021-11-25 19:54:55,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:54:55,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:55,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:54:55,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:54:55,748 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-25 19:54:55,749 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-25 19:54:55,749 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-25 19:54:55,749 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-25 19:54:55,749 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-25 19:54:55,749 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-25 19:54:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 19:54:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 19:54:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-25 19:54:55,750 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-25 19:54:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_recv_bulk_msg [2021-11-25 19:54:55,750 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_recv_bulk_msg [2021-11-25 19:54:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 19:54:55,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 19:54:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_save_screen [2021-11-25 19:54:55,751 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_save_screen [2021-11-25 19:54:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_free_buffers [2021-11-25 19:54:55,752 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_free_buffers [2021-11-25 19:54:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_disconnect [2021-11-25 19:54:55,752 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_disconnect [2021-11-25 19:54:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_deinit [2021-11-25 19:54:55,752 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_deinit [2021-11-25 19:54:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_memio_byte [2021-11-25 19:54:55,753 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_memio_byte [2021-11-25 19:54:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 19:54:55,753 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 19:54:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-25 19:54:55,753 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-25 19:54:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 19:54:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 19:54:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_set_cursor [2021-11-25 19:54:55,755 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_set_cursor [2021-11-25 19:54:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister_dev [2021-11-25 19:54:55,755 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister_dev [2021-11-25 19:54:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-25 19:54:55,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-25 19:54:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_memio_word [2021-11-25 19:54:55,756 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_memio_word [2021-11-25 19:54:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 19:54:55,756 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 19:54:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetReg [2021-11-25 19:54:55,757 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetReg [2021-11-25 19:54:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-25 19:54:55,757 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-25 19:54:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_get_sisusb_lock_and_check [2021-11-25 19:54:55,757 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_get_sisusb_lock_and_check [2021-11-25 19:54:55,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:54:55,758 INFO L130 BoogieDeclarations]: Found specification of procedure take_over_console [2021-11-25 19:54:55,758 INFO L138 BoogieDeclarations]: Found implementation of procedure take_over_console [2021-11-25 19:54:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_sisusb_valid [2021-11-25 19:54:55,760 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_sisusb_valid [2021-11-25 19:54:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:54:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegOR [2021-11-25 19:54:55,760 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegOR [2021-11-25 19:54:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_sisusb_usb_data [2021-11-25 19:54:55,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_sisusb_usb_data [2021-11-25 19:54:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-25 19:54:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_check_rbc [2021-11-25 19:54:55,761 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_check_rbc [2021-11-25 19:54:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:54:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:54:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-25 19:54:55,762 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-25 19:54:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_outurb_available [2021-11-25 19:54:55,763 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_outurb_available [2021-11-25 19:54:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_kill_all_busy [2021-11-25 19:54:55,763 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_kill_all_busy [2021-11-25 19:54:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-25 19:54:55,763 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-25 19:54:55,764 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-25 19:54:55,764 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-25 19:54:55,764 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_getidxreg [2021-11-25 19:54:55,765 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_getidxreg [2021-11-25 19:54:55,765 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-25 19:54:55,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-25 19:54:55,765 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-25 19:54:55,765 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-25 19:54:55,766 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_writeb [2021-11-25 19:54:55,766 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_writeb [2021-11-25 19:54:55,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 19:54:55,766 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-25 19:54:55,766 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-25 19:54:55,766 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_set_default_mode [2021-11-25 19:54:55,767 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_set_default_mode [2021-11-25 19:54:55,768 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_memio_byte [2021-11-25 19:54:55,768 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_memio_byte [2021-11-25 19:54:55,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 19:54:55,768 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_DisplayOn [2021-11-25 19:54:55,768 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_DisplayOn [2021-11-25 19:54:55,769 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxregandor [2021-11-25 19:54:55,769 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxregandor [2021-11-25 19:54:55,770 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_mem_bulk [2021-11-25 19:54:55,770 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_mem_bulk [2021-11-25 19:54:55,770 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2021-11-25 19:54:55,770 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2021-11-25 19:54:55,770 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbdummycon_init [2021-11-25 19:54:55,771 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbdummycon_init [2021-11-25 19:54:55,771 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2021-11-25 19:54:55,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2021-11-25 19:54:55,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:54:55,771 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_GetReg [2021-11-25 19:54:55,771 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_GetReg [2021-11-25 19:54:55,772 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_do_font_op [2021-11-25 19:54:55,772 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_do_font_op [2021-11-25 19:54:55,772 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_init_gfxdevice [2021-11-25 19:54:55,773 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_init_gfxdevice [2021-11-25 19:54:55,773 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegByte [2021-11-25 19:54:55,773 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegByte [2021-11-25 19:54:55,773 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_free_urbs [2021-11-25 19:54:55,773 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_free_urbs [2021-11-25 19:54:55,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 19:54:55,775 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 19:54:55,777 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_send_bridge_packet [2021-11-25 19:54:55,778 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_send_bridge_packet [2021-11-25 19:54:55,778 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-25 19:54:55,778 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-25 19:54:55,779 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-25 19:54:55,780 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-25 19:54:55,781 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_ioctl [2021-11-25 19:54:55,781 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_ioctl [2021-11-25 19:54:55,781 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_memio_word [2021-11-25 19:54:55,787 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_memio_word [2021-11-25 19:54:55,787 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_get_sisusb [2021-11-25 19:54:55,788 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_get_sisusb [2021-11-25 19:54:55,788 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 19:54:55,788 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 19:54:55,788 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_cursor [2021-11-25 19:54:55,788 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_cursor [2021-11-25 19:54:55,788 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_is_inactive [2021-11-25 19:54:55,789 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_is_inactive [2021-11-25 19:54:55,789 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-11-25 19:54:55,789 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-11-25 19:54:55,789 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_clear_vram [2021-11-25 19:54:55,789 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_clear_vram [2021-11-25 19:54:55,789 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_pci_config [2021-11-25 19:54:55,790 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_pci_config [2021-11-25 19:54:55,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:54:55,790 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-25 19:54:55,790 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-25 19:54:55,790 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_send_bulk_msg [2021-11-25 19:54:55,790 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_send_bulk_msg [2021-11-25 19:54:55,790 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-25 19:54:55,791 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-25 19:54:55,791 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 19:54:55,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 19:54:55,791 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_readb [2021-11-25 19:54:55,791 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_readb [2021-11-25 19:54:55,791 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxregor [2021-11-25 19:54:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxregor [2021-11-25 19:54:55,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:54:55,792 INFO L130 BoogieDeclarations]: Found specification of procedure vmalloc [2021-11-25 19:54:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure vmalloc [2021-11-25 19:54:55,792 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-25 19:54:55,792 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-25 19:54:55,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:54:55,793 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_send_packet [2021-11-25 19:54:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_send_packet [2021-11-25 19:54:55,793 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_memio_long [2021-11-25 19:54:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_memio_long [2021-11-25 19:54:55,793 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_reset_text_mode [2021-11-25 19:54:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_reset_text_mode [2021-11-25 19:54:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure SiSUSB_InitPtr [2021-11-25 19:54:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure SiSUSB_InitPtr [2021-11-25 19:54:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:54:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_pci_config [2021-11-25 19:54:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_pci_config [2021-11-25 19:54:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 19:54:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxreg [2021-11-25 19:54:55,795 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxreg [2021-11-25 19:54:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegANDOR [2021-11-25 19:54:55,795 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegANDOR [2021-11-25 19:54:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 19:54:55,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 19:54:55,796 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_wait_all_out_complete [2021-11-25 19:54:55,796 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_wait_all_out_complete [2021-11-25 19:54:55,796 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-25 19:54:55,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-25 19:54:55,796 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegAND [2021-11-25 19:54:55,796 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegAND [2021-11-25 19:54:55,796 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxregand [2021-11-25 19:54:55,797 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxregand [2021-11-25 19:54:55,797 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-25 19:54:55,797 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-25 19:54:55,797 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetSegmentReg [2021-11-25 19:54:55,797 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetSegmentReg [2021-11-25 19:54:55,797 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_copy_memory [2021-11-25 19:54:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_copy_memory [2021-11-25 19:54:55,798 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setreg [2021-11-25 19:54:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setreg [2021-11-25 19:54:55,798 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_sisusb_usb_data [2021-11-25 19:54:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_sisusb_usb_data [2021-11-25 19:54:55,798 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_set_start_address [2021-11-25 19:54:55,798 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_set_start_address [2021-11-25 19:54:55,799 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-11-25 19:54:55,799 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-11-25 19:54:55,799 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 19:54:55,799 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 19:54:55,799 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_WriteDAC [2021-11-25 19:54:55,799 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_WriteDAC [2021-11-25 19:54:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_mem_bulk [2021-11-25 19:54:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_mem_bulk [2021-11-25 19:54:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_getreg [2021-11-25 19:54:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_getreg [2021-11-25 19:54:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure SiSUSBSetMode [2021-11-25 19:54:55,800 INFO L138 BoogieDeclarations]: Found implementation of procedure SiSUSBSetMode [2021-11-25 19:54:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure vc_resize [2021-11-25 19:54:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure vc_resize [2021-11-25 19:54:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_init [2021-11-25 19:54:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_init [2021-11-25 19:54:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout [2021-11-25 19:54:55,801 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout [2021-11-25 19:54:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:54:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_memio_long [2021-11-25 19:54:55,802 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_memio_long [2021-11-25 19:54:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_GetRegByte [2021-11-25 19:54:55,802 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_GetRegByte [2021-11-25 19:54:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 19:54:55,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 19:54:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_triggersr16 [2021-11-25 19:54:55,803 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_triggersr16 [2021-11-25 19:54:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-25 19:54:55,803 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-25 19:54:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:54:55,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:54:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_all_free [2021-11-25 19:54:55,804 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_all_free [2021-11-25 19:54:56,879 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:54:56,884 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:55:30,659 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:55:32,797 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:55:32,798 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:55:32,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:55:32 BoogieIcfgContainer [2021-11-25 19:55:32,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:55:32,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:55:32,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:55:32,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:55:32,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:54:50" (1/3) ... [2021-11-25 19:55:32,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749f74d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:55:32, skipping insertion in model container [2021-11-25 19:55:32,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:54" (2/3) ... [2021-11-25 19:55:32,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749f74d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:55:32, skipping insertion in model container [2021-11-25 19:55:32,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:55:32" (3/3) ... [2021-11-25 19:55:32,817 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-25 19:55:32,826 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:55:32,826 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:55:32,906 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:55:32,916 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 [2021-11-25 19:55:32,917 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:55:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 2233 states, 1362 states have (on average 1.3193832599118942) internal successors, (1797), 1389 states have internal predecessors, (1797), 765 states have call successors, (765), 104 states have call predecessors, (765), 104 states have return successors, (765), 761 states have call predecessors, (765), 765 states have call successors, (765) [2021-11-25 19:55:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:55:33,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:55:33,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:55:33,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:55:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:55:33,026 INFO L85 PathProgramCache]: Analyzing trace with hash 258264672, now seen corresponding path program 1 times [2021-11-25 19:55:33,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:55:33,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549805845] [2021-11-25 19:55:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:55:33,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:55:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:55:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:55:34,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:55:34,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549805845] [2021-11-25 19:55:34,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549805845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:55:34,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:55:34,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:55:34,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187104829] [2021-11-25 19:55:34,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:55:34,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:55:34,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:55:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:55:34,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:55:34,311 INFO L87 Difference]: Start difference. First operand has 2233 states, 1362 states have (on average 1.3193832599118942) internal successors, (1797), 1389 states have internal predecessors, (1797), 765 states have call successors, (765), 104 states have call predecessors, (765), 104 states have return successors, (765), 761 states have call predecessors, (765), 765 states have call successors, (765) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:55:38,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:55:40,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:55:43,567 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:55:44,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:55:44,093 INFO L93 Difference]: Finished difference Result 4459 states and 6713 transitions. [2021-11-25 19:55:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:55:44,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-25 19:55:44,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:55:44,145 INFO L225 Difference]: With dead ends: 4459 [2021-11-25 19:55:44,146 INFO L226 Difference]: Without dead ends: 2229 [2021-11-25 19:55:44,168 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 [2021-11-25 19:55:44,173 INFO L933 BasicCegarLoop]: 3034 mSDtfsCounter, 0 mSDsluCounter, 3317 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6067 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:55:44,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6067 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 570 Invalid, 3 Unknown, 0 Unchecked, 9.4s Time] [2021-11-25 19:55:44,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-11-25 19:55:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 2229. [2021-11-25 19:55:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 1361 states have (on average 1.3181484202792064) internal successors, (1794), 1386 states have internal predecessors, (1794), 765 states have call successors, (765), 104 states have call predecessors, (765), 102 states have return successors, (759), 755 states have call predecessors, (759), 759 states have call successors, (759) [2021-11-25 19:55:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 3318 transitions. [2021-11-25 19:55:44,439 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 3318 transitions. Word has length 14 [2021-11-25 19:55:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:55:44,441 INFO L470 AbstractCegarLoop]: Abstraction has 2229 states and 3318 transitions. [2021-11-25 19:55:44,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:55:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 3318 transitions. [2021-11-25 19:55:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:55:44,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:55:44,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:55:44,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:55:44,444 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:55:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:55:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1990268969, now seen corresponding path program 1 times [2021-11-25 19:55:44,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:55:44,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704443574] [2021-11-25 19:55:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:55:44,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:55:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:55:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:55:45,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:55:45,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704443574] [2021-11-25 19:55:45,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704443574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:55:45,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439216385] [2021-11-25 19:55:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:55:45,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:55:45,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:55:45,015 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:55:45,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:55:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:55:47,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 8399 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:55:47,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:55:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:55:47,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:55:47,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439216385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:55:47,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:55:47,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 19:55:47,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903088139] [2021-11-25 19:55:47,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:55:47,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:55:47,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:55:47,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:55:47,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:55:47,276 INFO L87 Difference]: Start difference. First operand 2229 states and 3318 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:55:50,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:55:53,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:55:55,819 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:55:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:55:56,498 INFO L93 Difference]: Finished difference Result 2774 states and 4098 transitions. [2021-11-25 19:55:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:55:56,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-11-25 19:55:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:55:56,530 INFO L225 Difference]: With dead ends: 2774 [2021-11-25 19:55:56,531 INFO L226 Difference]: Without dead ends: 2771 [2021-11-25 19:55:56,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:55:56,536 INFO L933 BasicCegarLoop]: 3361 mSDtfsCounter, 2886 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2891 SdHoareTripleChecker+Valid, 4430 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:55:56,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2891 Valid, 4430 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 417 Invalid, 3 Unknown, 0 Unchecked, 9.0s Time] [2021-11-25 19:55:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-11-25 19:55:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2768. [2021-11-25 19:55:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 1692 states have (on average 1.3132387706855793) internal successors, (2222), 1720 states have internal predecessors, (2222), 937 states have call successors, (937), 140 states have call predecessors, (937), 138 states have return successors, (932), 928 states have call predecessors, (932), 932 states have call successors, (932) [2021-11-25 19:55:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 4091 transitions. [2021-11-25 19:55:56,740 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 4091 transitions. Word has length 15 [2021-11-25 19:55:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:55:56,741 INFO L470 AbstractCegarLoop]: Abstraction has 2768 states and 4091 transitions. [2021-11-25 19:55:56,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:55:56,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 4091 transitions. [2021-11-25 19:55:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:55:56,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:55:56,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:55:56,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:55:56,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:55:56,944 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:55:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:55:56,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1566427158, now seen corresponding path program 1 times [2021-11-25 19:55:56,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:55:56,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192811334] [2021-11-25 19:55:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:55:56,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:55:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:55:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:55:57,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:55:57,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192811334] [2021-11-25 19:55:57,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192811334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:55:57,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213354012] [2021-11-25 19:55:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:55:57,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:55:57,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:55:57,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:55:57,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:55:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:55:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 8401 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:55:59,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:55:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:55:59,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:55:59,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213354012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:55:59,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:55:59,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 19:55:59,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101017140] [2021-11-25 19:55:59,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:55:59,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:55:59,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:55:59,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:55:59,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:55:59,605 INFO L87 Difference]: Start difference. First operand 2768 states and 4091 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:56:03,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:56:06,141 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:56:09,484 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:56:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:10,208 INFO L93 Difference]: Finished difference Result 7520 states and 11121 transitions. [2021-11-25 19:56:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-25 19:56:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:10,261 INFO L225 Difference]: With dead ends: 7520 [2021-11-25 19:56:10,262 INFO L226 Difference]: Without dead ends: 4761 [2021-11-25 19:56:10,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:56:10,289 INFO L933 BasicCegarLoop]: 4717 mSDtfsCounter, 2369 mSDsluCounter, 3089 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 7537 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:10,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2369 Valid, 7537 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 678 Invalid, 3 Unknown, 0 Unchecked, 10.3s Time] [2021-11-25 19:56:10,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-11-25 19:56:10,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 4758. [2021-11-25 19:56:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 2912 states have (on average 1.3066620879120878) internal successors, (3805), 2971 states have internal predecessors, (3805), 1595 states have call successors, (1595), 249 states have call predecessors, (1595), 250 states have return successors, (1602), 1571 states have call predecessors, (1602), 1577 states have call successors, (1602) [2021-11-25 19:56:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 7002 transitions. [2021-11-25 19:56:10,905 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 7002 transitions. Word has length 16 [2021-11-25 19:56:10,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:10,905 INFO L470 AbstractCegarLoop]: Abstraction has 4758 states and 7002 transitions. [2021-11-25 19:56:10,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:56:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 7002 transitions. [2021-11-25 19:56:10,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:56:10,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:10,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:10,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:56:11,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:56:11,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:11,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:11,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1312237772, now seen corresponding path program 1 times [2021-11-25 19:56:11,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:11,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239744766] [2021-11-25 19:56:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:11,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:11,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:11,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239744766] [2021-11-25 19:56:11,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239744766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:56:11,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460554606] [2021-11-25 19:56:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:11,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:56:11,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:56:11,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:56:11,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:56:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:13,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 8403 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:56:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:56:13,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:56:13,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460554606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:13,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:56:13,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 19:56:13,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787430591] [2021-11-25 19:56:13,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:13,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:13,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:56:13,593 INFO L87 Difference]: Start difference. First operand 4758 states and 7002 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:56:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:16,475 INFO L93 Difference]: Finished difference Result 4760 states and 7003 transitions. [2021-11-25 19:56:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:16,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-25 19:56:16,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:16,528 INFO L225 Difference]: With dead ends: 4760 [2021-11-25 19:56:16,528 INFO L226 Difference]: Without dead ends: 4751 [2021-11-25 19:56:16,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:56:16,537 INFO L933 BasicCegarLoop]: 3027 mSDtfsCounter, 3299 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3299 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:16,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3299 Valid, 3028 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:56:16,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-11-25 19:56:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 4751. [2021-11-25 19:56:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4751 states, 2908 states have (on average 1.3046767537826685) internal successors, (3794), 2966 states have internal predecessors, (3794), 1592 states have call successors, (1592), 248 states have call predecessors, (1592), 250 states have return successors, (1601), 1570 states have call predecessors, (1601), 1576 states have call successors, (1601) [2021-11-25 19:56:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4751 states to 4751 states and 6987 transitions. [2021-11-25 19:56:17,011 INFO L78 Accepts]: Start accepts. Automaton has 4751 states and 6987 transitions. Word has length 17 [2021-11-25 19:56:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:17,012 INFO L470 AbstractCegarLoop]: Abstraction has 4751 states and 6987 transitions. [2021-11-25 19:56:17,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:56:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4751 states and 6987 transitions. [2021-11-25 19:56:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:56:17,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:17,022 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 19:56:17,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:56:17,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:56:17,237 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:17,237 INFO L85 PathProgramCache]: Analyzing trace with hash -147111788, now seen corresponding path program 1 times [2021-11-25 19:56:17,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:17,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101962190] [2021-11-25 19:56:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:17,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:56:17,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:17,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101962190] [2021-11-25 19:56:17,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101962190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:56:17,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057134940] [2021-11-25 19:56:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:17,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:56:17,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:56:17,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:56:17,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:56:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:19,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 8581 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:56:19,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:56:19,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:56:19,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057134940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:19,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:56:19,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 19:56:19,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357385648] [2021-11-25 19:56:19,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:19,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:19,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:56:19,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:19,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:56:19,751 INFO L87 Difference]: Start difference. First operand 4751 states and 6987 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:56:21,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:56:25,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:56:28,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:56:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:29,118 INFO L93 Difference]: Finished difference Result 9705 states and 14321 transitions. [2021-11-25 19:56:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:29,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-11-25 19:56:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:29,168 INFO L225 Difference]: With dead ends: 9705 [2021-11-25 19:56:29,168 INFO L226 Difference]: Without dead ends: 4963 [2021-11-25 19:56:29,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:56:29,205 INFO L933 BasicCegarLoop]: 3060 mSDtfsCounter, 137 mSDsluCounter, 3241 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 6024 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:29,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 6024 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 583 Invalid, 2 Unknown, 0 Unchecked, 9.1s Time] [2021-11-25 19:56:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4963 states. [2021-11-25 19:56:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4963 to 4939. [2021-11-25 19:56:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 3034 states have (on average 1.3114700065919578) internal successors, (3979), 3099 states have internal predecessors, (3979), 1654 states have call successors, (1654), 248 states have call predecessors, (1654), 250 states have return successors, (1668), 1631 states have call predecessors, (1668), 1638 states have call successors, (1668) [2021-11-25 19:56:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 7301 transitions. [2021-11-25 19:56:29,548 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 7301 transitions. Word has length 36 [2021-11-25 19:56:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:29,549 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 7301 transitions. [2021-11-25 19:56:29,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:56:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 7301 transitions. [2021-11-25 19:56:29,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 19:56:29,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:29,554 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 19:56:29,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:56:29,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:56:29,767 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:29,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1420211316, now seen corresponding path program 1 times [2021-11-25 19:56:29,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:29,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796949638] [2021-11-25 19:56:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:29,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:56:30,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:56:30,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796949638] [2021-11-25 19:56:30,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796949638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:56:30,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885508086] [2021-11-25 19:56:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:30,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:56:30,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:56:30,303 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:56:30,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cb301f-3892-4f2e-b2c3-070563f1ee96/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:56:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:32,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 8573 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:56:32,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:32,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:56:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:56:32,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885508086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:56:32,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1389737231] [2021-11-25 19:56:32,595 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2021-11-25 19:56:32,595 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:56:32,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:56:32,616 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:56:32,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:57:35,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 551 treesize of output 443 [2021-11-25 19:57:41,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 551 treesize of output 443 [2021-11-25 20:01:24,237 WARN L227 SmtUtils]: Spent 13.54s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:01:37,865 WARN L227 SmtUtils]: Spent 13.58s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:01:52,791 WARN L227 SmtUtils]: Spent 14.78s on a formula simplification. DAG size of input: 13885 DAG size of output: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:02:06,832 WARN L227 SmtUtils]: Spent 13.89s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:02:20,765 WARN L227 SmtUtils]: Spent 13.90s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:02:35,518 WARN L227 SmtUtils]: Spent 14.72s on a formula simplification. DAG size of input: 13885 DAG size of output: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:02:49,525 WARN L227 SmtUtils]: Spent 13.89s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:03:02,848 WARN L227 SmtUtils]: Spent 13.30s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:03:16,647 WARN L227 SmtUtils]: Spent 13.77s on a formula simplification. DAG size of input: 13885 DAG size of output: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:03:29,683 WARN L227 SmtUtils]: Spent 12.95s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:03:42,663 WARN L227 SmtUtils]: Spent 12.96s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:03:56,428 WARN L227 SmtUtils]: Spent 13.74s on a formula simplification. DAG size of input: 13885 DAG size of output: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:07:01,563 WARN L227 SmtUtils]: Spent 12.95s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:07:14,588 WARN L227 SmtUtils]: Spent 13.00s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:07:28,593 WARN L227 SmtUtils]: Spent 13.88s on a formula simplification. DAG size of input: 13885 DAG size of output: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:07:41,662 WARN L227 SmtUtils]: Spent 12.98s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:07:54,683 WARN L227 SmtUtils]: Spent 12.98s on a formula simplification that was a NOOP. DAG size: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-25 20:08:08,502 WARN L227 SmtUtils]: Spent 13.79s on a formula simplification. DAG size of input: 13885 DAG size of output: 13766 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)