./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V --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 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:53:36,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:53:36,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:53:36,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:53:36,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:53:36,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:53:36,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:53:36,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:53:36,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:53:36,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:53:36,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:53:36,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:53:36,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:53:36,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:53:36,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:53:36,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:53:36,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:53:36,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:53:36,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:53:36,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:53:36,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:53:36,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:53:36,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:53:36,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:53:36,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:53:36,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:53:36,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:53:36,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:53:36,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:53:36,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:53:36,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:53:36,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:53:36,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:53:36,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:53:36,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:53:36,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:53:36,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:53:36,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:53:36,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:53:36,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:53:36,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:53:36,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:53:36,454 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:53:36,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:53:36,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:53:36,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:53:36,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:53:36,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:53:36,457 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:53:36,457 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:53:36,457 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:53:36,458 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:53:36,459 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:53:36,459 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:53:36,459 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:53:36,460 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:53:36,460 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:53:36,460 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:53:36,461 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:53:36,461 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:53:36,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:53:36,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:53:36,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:53:36,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:53:36,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:53:36,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:53:36,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:53:36,464 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:53:36,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:53:36,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:53:36,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:53:36,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:53:36,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:53:36,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:53:36,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:53:36,466 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:53:36,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:53:36,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:53:36,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:53:36,467 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:53:36,467 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_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 375c8b791fa06d541fb014bd5076ab9979e5fb4b76e2515aaac1f292cd2a1d79 [2021-11-23 02:53:36,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:53:36,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:53:36,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:53:36,853 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:53:36,854 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:53:36,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-23 02:53:36,937 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/data/4dfc531a0/e8fc8b1588ca4e6d93208e76dce2f4b1/FLAG9fa0e97cd [2021-11-23 02:53:37,901 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:53:37,902 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-23 02:53:37,965 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/data/4dfc531a0/e8fc8b1588ca4e6d93208e76dce2f4b1/FLAG9fa0e97cd [2021-11-23 02:53:38,324 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/data/4dfc531a0/e8fc8b1588ca4e6d93208e76dce2f4b1 [2021-11-23 02:53:38,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:53:38,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:53:38,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:53:38,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:53:38,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:53:38,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:53:38" (1/1) ... [2021-11-23 02:53:38,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7701eee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:38, skipping insertion in model container [2021-11-23 02:53:38,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:53:38" (1/1) ... [2021-11-23 02:53:38,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:53:38,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:53:40,561 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_67206d64-230b-4591-b284-f3aa93697445/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-23 02:53:40,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:53:40,727 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:53:41,173 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_67206d64-230b-4591-b284-f3aa93697445/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i[258653,258666] [2021-11-23 02:53:41,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:53:41,400 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:53:41,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41 WrapperNode [2021-11-23 02:53:41,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:53:41,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:53:41,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:53:41,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:53:41,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41" (1/1) ... [2021-11-23 02:53:41,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41" (1/1) ... [2021-11-23 02:53:41,766 INFO L137 Inliner]: procedures = 226, calls = 1428, calls flagged for inlining = 121, calls inlined = 118, statements flattened = 3761 [2021-11-23 02:53:41,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:53:41,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:53:41,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:53:41,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:53:41,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41" (1/1) ... [2021-11-23 02:53:41,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41" (1/1) ... [2021-11-23 02:53:41,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41" (1/1) ... [2021-11-23 02:53:41,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41" (1/1) ... [2021-11-23 02:53:42,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41" (1/1) ... [2021-11-23 02:53:42,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41" (1/1) ... [2021-11-23 02:53:42,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41" (1/1) ... [2021-11-23 02:53:42,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:53:42,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:53:42,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:53:42,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:53:42,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41" (1/1) ... [2021-11-23 02:53:42,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:53:42,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:53:42,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:53:42,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:53:42,221 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_get_drvinfo [2021-11-23 02:53:42,222 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_get_drvinfo [2021-11-23 02:53:42,222 INFO L130 BoogieDeclarations]: Found specification of procedure check_if_running [2021-11-23 02:53:42,222 INFO L138 BoogieDeclarations]: Found implementation of procedure check_if_running [2021-11-23 02:53:42,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:53:42,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:53:42,223 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 02:53:42,223 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 02:53:42,223 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:53:42,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:53:42,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:53:42,223 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:53:42,224 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-23 02:53:42,224 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-23 02:53:42,224 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 02:53:42,224 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 02:53:42,224 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-23 02:53:42,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-23 02:53:42,225 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:53:42,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:53:42,225 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2021-11-23 02:53:42,225 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2021-11-23 02:53:42,226 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:53:42,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:53:42,226 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-23 02:53:42,226 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-23 02:53:42,226 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 02:53:42,226 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 02:53:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:53:42,227 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:53:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:53:42,227 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:53:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:53:42,228 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:53:42,229 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-23 02:53:42,230 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-23 02:53:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-23 02:53:42,230 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-23 02:53:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:53:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-23 02:53:42,231 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-23 02:53:42,231 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-23 02:53:42,231 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-23 02:53:42,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:53:42,231 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-23 02:53:42,232 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-23 02:53:42,232 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:53:42,233 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:53:42,233 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:53:42,234 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:53:42,235 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-23 02:53:42,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-23 02:53:42,235 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-23 02:53:42,235 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-23 02:53:42,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:53:42,236 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-23 02:53:42,236 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-23 02:53:42,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:53:42,236 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-23 02:53:42,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-23 02:53:42,237 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-23 02:53:42,238 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-23 02:53:42,238 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:53:42,238 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:53:42,238 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:53:42,238 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:53:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:53:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:53:42,239 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:53:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:53:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-23 02:53:42,239 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-23 02:53:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:53:42,241 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-23 02:53:42,241 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-23 02:53:42,241 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:53:42,241 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:53:42,241 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 02:53:42,242 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 02:53:42,242 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_ioctl [2021-11-23 02:53:42,242 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_ioctl [2021-11-23 02:53:42,242 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-23 02:53:42,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-23 02:53:42,243 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-23 02:53:42,244 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-23 02:53:42,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:53:42,244 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-23 02:53:42,244 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-23 02:53:42,244 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:53:42,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:53:42,246 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:53:42,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:53:42,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:53:42,247 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:53:42,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:53:42,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:53:42,247 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:53:42,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:53:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:53:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-23 02:53:42,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-23 02:53:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_get_stats [2021-11-23 02:53:42,249 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_get_stats [2021-11-23 02:53:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2021-11-23 02:53:42,249 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2021-11-23 02:53:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-23 02:53:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-23 02:53:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure hamachi_tx_timeout [2021-11-23 02:53:42,251 INFO L138 BoogieDeclarations]: Found implementation of procedure hamachi_tx_timeout [2021-11-23 02:53:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-23 02:53:42,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-23 02:53:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-23 02:53:42,255 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-23 02:53:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-23 02:53:42,256 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-23 02:53:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-23 02:53:42,257 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-23 02:53:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 02:53:42,259 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 02:53:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:53:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-23 02:53:42,265 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-23 02:53:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-23 02:53:42,266 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-23 02:53:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-23 02:53:42,266 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-23 02:53:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-23 02:53:42,267 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-23 02:53:42,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:53:42,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:53:43,000 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:53:43,003 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:53:44,020 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:53:45,954 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:53:46,965 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:53:46,965 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:53:46,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:53:46 BoogieIcfgContainer [2021-11-23 02:53:46,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:53:46,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:53:46,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:53:46,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:53:46,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:53:38" (1/3) ... [2021-11-23 02:53:46,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a62be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:53:46, skipping insertion in model container [2021-11-23 02:53:46,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:41" (2/3) ... [2021-11-23 02:53:46,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a62be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:53:46, skipping insertion in model container [2021-11-23 02:53:46,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:53:46" (3/3) ... [2021-11-23 02:53:46,982 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--packetengines--hamachi.ko-entry_point.cil.out.i [2021-11-23 02:53:46,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:53:46,989 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:53:47,076 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:53:47,096 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 [2021-11-23 02:53:47,105 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:53:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 537 states have (on average 1.366852886405959) internal successors, (734), 565 states have internal predecessors, (734), 285 states have call successors, (285), 57 states have call predecessors, (285), 56 states have return successors, (277), 267 states have call predecessors, (277), 277 states have call successors, (277) [2021-11-23 02:53:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 02:53:47,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:47,208 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:47,210 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:53:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:47,216 INFO L85 PathProgramCache]: Analyzing trace with hash 590748891, now seen corresponding path program 1 times [2021-11-23 02:53:47,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:47,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949918774] [2021-11-23 02:53:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:47,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:53:47,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:47,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949918774] [2021-11-23 02:53:47,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949918774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:47,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:47,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:53:47,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423289260] [2021-11-23 02:53:47,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:47,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:53:47,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:47,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:53:47,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:53:47,929 INFO L87 Difference]: Start difference. First operand has 880 states, 537 states have (on average 1.366852886405959) internal successors, (734), 565 states have internal predecessors, (734), 285 states have call successors, (285), 57 states have call predecessors, (285), 56 states have return successors, (277), 267 states have call predecessors, (277), 277 states have call successors, (277) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:53:50,461 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 [] [2021-11-23 02:53:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:51,480 INFO L93 Difference]: Finished difference Result 2235 states and 3276 transitions. [2021-11-23 02:53:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:53:51,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-23 02:53:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:51,515 INFO L225 Difference]: With dead ends: 2235 [2021-11-23 02:53:51,516 INFO L226 Difference]: Without dead ends: 1347 [2021-11-23 02:53:51,529 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 [2021-11-23 02:53:51,532 INFO L933 BasicCegarLoop]: 1277 mSDtfsCounter, 720 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:51,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 2323 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 353 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 02:53:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-11-23 02:53:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1342. [2021-11-23 02:53:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 836 states have (on average 1.332535885167464) internal successors, (1114), 863 states have internal predecessors, (1114), 407 states have call successors, (407), 99 states have call predecessors, (407), 98 states have return successors, (406), 392 states have call predecessors, (406), 406 states have call successors, (406) [2021-11-23 02:53:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1927 transitions. [2021-11-23 02:53:51,724 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1927 transitions. Word has length 120 [2021-11-23 02:53:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:51,725 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1927 transitions. [2021-11-23 02:53:51,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:53:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1927 transitions. [2021-11-23 02:53:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 02:53:51,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:51,731 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:51,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:53:51,732 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:53:51,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:51,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1779453808, now seen corresponding path program 1 times [2021-11-23 02:53:51,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:51,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082464478] [2021-11-23 02:53:51,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:51,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:53:52,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:52,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082464478] [2021-11-23 02:53:52,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082464478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:52,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:52,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:53:52,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138476274] [2021-11-23 02:53:52,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:52,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:53:52,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:52,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:53:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:53:52,072 INFO L87 Difference]: Start difference. First operand 1342 states and 1927 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:53:54,782 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 [] [2021-11-23 02:53:55,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:55,912 INFO L93 Difference]: Finished difference Result 3159 states and 4515 transitions. [2021-11-23 02:53:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:53:55,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2021-11-23 02:53:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:55,932 INFO L225 Difference]: With dead ends: 3159 [2021-11-23 02:53:55,932 INFO L226 Difference]: Without dead ends: 1841 [2021-11-23 02:53:55,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:53:55,941 INFO L933 BasicCegarLoop]: 1254 mSDtfsCounter, 685 mSDsluCounter, 4014 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 4845 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:55,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 4845 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 588 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-11-23 02:53:55,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-11-23 02:53:56,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1829. [2021-11-23 02:53:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1147 states have (on average 1.3251961639058414) internal successors, (1520), 1182 states have internal predecessors, (1520), 540 states have call successors, (540), 142 states have call predecessors, (540), 141 states have return successors, (539), 523 states have call predecessors, (539), 539 states have call successors, (539) [2021-11-23 02:53:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 2599 transitions. [2021-11-23 02:53:56,068 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 2599 transitions. Word has length 134 [2021-11-23 02:53:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:56,069 INFO L470 AbstractCegarLoop]: Abstraction has 1829 states and 2599 transitions. [2021-11-23 02:53:56,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:53:56,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 2599 transitions. [2021-11-23 02:53:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 02:53:56,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:56,074 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:56,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:53:56,074 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:53:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:56,075 INFO L85 PathProgramCache]: Analyzing trace with hash 464061107, now seen corresponding path program 1 times [2021-11-23 02:53:56,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:56,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053617868] [2021-11-23 02:53:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:56,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:53:56,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:56,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053617868] [2021-11-23 02:53:56,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053617868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:56,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:56,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:53:56,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336367063] [2021-11-23 02:53:56,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:56,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:53:56,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:56,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:53:56,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:53:56,372 INFO L87 Difference]: Start difference. First operand 1829 states and 2599 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:53:59,555 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 [] [2021-11-23 02:54:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:00,308 INFO L93 Difference]: Finished difference Result 4141 states and 5867 transitions. [2021-11-23 02:54:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:54:00,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 132 [2021-11-23 02:54:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:00,329 INFO L225 Difference]: With dead ends: 4141 [2021-11-23 02:54:00,329 INFO L226 Difference]: Without dead ends: 2336 [2021-11-23 02:54:00,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:54:00,339 INFO L933 BasicCegarLoop]: 1259 mSDtfsCounter, 689 mSDsluCounter, 4032 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 4862 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:00,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 4862 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 600 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 02:54:00,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-11-23 02:54:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2311. [2021-11-23 02:54:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 1454 states have (on average 1.3218707015130673) internal successors, (1922), 1500 states have internal predecessors, (1922), 672 states have call successors, (672), 185 states have call predecessors, (672), 184 states have return successors, (671), 650 states have call predecessors, (671), 671 states have call successors, (671) [2021-11-23 02:54:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3265 transitions. [2021-11-23 02:54:00,556 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3265 transitions. Word has length 132 [2021-11-23 02:54:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:00,557 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 3265 transitions. [2021-11-23 02:54:00,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:54:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3265 transitions. [2021-11-23 02:54:00,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 02:54:00,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:00,562 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:00,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:54:00,562 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:00,563 INFO L85 PathProgramCache]: Analyzing trace with hash 763678798, now seen corresponding path program 1 times [2021-11-23 02:54:00,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:00,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870753166] [2021-11-23 02:54:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:00,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:54:00,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:00,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870753166] [2021-11-23 02:54:00,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870753166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:00,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:00,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:54:00,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195447556] [2021-11-23 02:54:00,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:00,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:54:00,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:00,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:54:00,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:54:00,784 INFO L87 Difference]: Start difference. First operand 2311 states and 3265 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:54:03,541 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 [] [2021-11-23 02:54:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:04,684 INFO L93 Difference]: Finished difference Result 4380 states and 6179 transitions. [2021-11-23 02:54:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:54:04,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 133 [2021-11-23 02:54:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:04,705 INFO L225 Difference]: With dead ends: 4380 [2021-11-23 02:54:04,705 INFO L226 Difference]: Without dead ends: 2336 [2021-11-23 02:54:04,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:54:04,716 INFO L933 BasicCegarLoop]: 1254 mSDtfsCounter, 685 mSDsluCounter, 4014 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 4845 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:04,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 4845 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 588 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 02:54:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-11-23 02:54:04,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2315. [2021-11-23 02:54:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 1458 states have (on average 1.3209876543209877) internal successors, (1926), 1503 states have internal predecessors, (1926), 671 states have call successors, (671), 186 states have call predecessors, (671), 185 states have return successors, (670), 650 states have call predecessors, (670), 670 states have call successors, (670) [2021-11-23 02:54:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3267 transitions. [2021-11-23 02:54:04,868 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3267 transitions. Word has length 133 [2021-11-23 02:54:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:04,869 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 3267 transitions. [2021-11-23 02:54:04,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:54:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3267 transitions. [2021-11-23 02:54:04,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 02:54:04,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:04,875 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:04,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:54:04,875 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash -773698069, now seen corresponding path program 1 times [2021-11-23 02:54:04,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:04,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254276119] [2021-11-23 02:54:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:04,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:54:05,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:05,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254276119] [2021-11-23 02:54:05,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254276119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:05,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:05,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:54:05,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115020102] [2021-11-23 02:54:05,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:05,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:54:05,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:05,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:54:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:54:05,196 INFO L87 Difference]: Start difference. First operand 2315 states and 3267 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:54:08,065 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 [] [2021-11-23 02:54:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:09,221 INFO L93 Difference]: Finished difference Result 4165 states and 5878 transitions. [2021-11-23 02:54:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:54:09,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 135 [2021-11-23 02:54:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:09,241 INFO L225 Difference]: With dead ends: 4165 [2021-11-23 02:54:09,241 INFO L226 Difference]: Without dead ends: 2116 [2021-11-23 02:54:09,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:54:09,255 INFO L933 BasicCegarLoop]: 1254 mSDtfsCounter, 682 mSDsluCounter, 4014 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 4845 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:09,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 4845 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 588 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 02:54:09,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-11-23 02:54:09,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 2098. [2021-11-23 02:54:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1324 states have (on average 1.3270392749244713) internal successors, (1757), 1364 states have internal predecessors, (1757), 605 states have call successors, (605), 169 states have call predecessors, (605), 168 states have return successors, (604), 587 states have call predecessors, (604), 604 states have call successors, (604) [2021-11-23 02:54:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2966 transitions. [2021-11-23 02:54:09,417 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2966 transitions. Word has length 135 [2021-11-23 02:54:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:09,418 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 2966 transitions. [2021-11-23 02:54:09,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:54:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2966 transitions. [2021-11-23 02:54:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 02:54:09,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:09,426 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:09,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:54:09,426 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:09,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:09,427 INFO L85 PathProgramCache]: Analyzing trace with hash -565687776, now seen corresponding path program 1 times [2021-11-23 02:54:09,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:09,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712964234] [2021-11-23 02:54:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:09,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-23 02:54:09,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:09,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712964234] [2021-11-23 02:54:09,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712964234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:54:09,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57848514] [2021-11-23 02:54:09,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:09,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:09,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:09,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:09,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:54:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:10,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 2624 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:54:10,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:54:11,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:54:11,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57848514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:11,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:54:11,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-23 02:54:11,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839563560] [2021-11-23 02:54:11,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:11,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:54:11,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:11,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:54:11,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:54:11,095 INFO L87 Difference]: Start difference. First operand 2098 states and 2966 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:54:14,584 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 [] [2021-11-23 02:54:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:16,694 INFO L93 Difference]: Finished difference Result 5433 states and 7683 transitions. [2021-11-23 02:54:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:54:16,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 146 [2021-11-23 02:54:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:16,725 INFO L225 Difference]: With dead ends: 5433 [2021-11-23 02:54:16,725 INFO L226 Difference]: Without dead ends: 3618 [2021-11-23 02:54:16,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:54:16,736 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 1091 mSDsluCounter, 9033 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 9809 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:16,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 9809 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1237 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 02:54:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-11-23 02:54:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 3578. [2021-11-23 02:54:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 2275 states have (on average 1.3314285714285714) internal successors, (3029), 2351 states have internal predecessors, (3029), 1011 states have call successors, (1011), 289 states have call predecessors, (1011), 291 states have return successors, (1019), 976 states have call predecessors, (1019), 1010 states have call successors, (1019) [2021-11-23 02:54:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 5059 transitions. [2021-11-23 02:54:16,945 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 5059 transitions. Word has length 146 [2021-11-23 02:54:16,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:16,946 INFO L470 AbstractCegarLoop]: Abstraction has 3578 states and 5059 transitions. [2021-11-23 02:54:16,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:54:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 5059 transitions. [2021-11-23 02:54:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 02:54:16,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:16,952 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:16,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:17,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:17,166 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:17,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:17,166 INFO L85 PathProgramCache]: Analyzing trace with hash -76183936, now seen corresponding path program 1 times [2021-11-23 02:54:17,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:17,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262753336] [2021-11-23 02:54:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:17,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:54:17,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:17,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262753336] [2021-11-23 02:54:17,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262753336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:54:17,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154615107] [2021-11-23 02:54:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:17,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:17,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:17,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:17,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:54:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:18,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 2626 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:54:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:54:18,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:54:18,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154615107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:18,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:54:18,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-23 02:54:18,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657209886] [2021-11-23 02:54:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:18,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:54:18,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:54:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:54:18,710 INFO L87 Difference]: Start difference. First operand 3578 states and 5059 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:54:22,318 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 [] [2021-11-23 02:54:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:24,347 INFO L93 Difference]: Finished difference Result 8412 states and 11886 transitions. [2021-11-23 02:54:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:54:24,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 147 [2021-11-23 02:54:24,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:24,438 INFO L225 Difference]: With dead ends: 8412 [2021-11-23 02:54:24,442 INFO L226 Difference]: Without dead ends: 5117 [2021-11-23 02:54:24,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:54:24,458 INFO L933 BasicCegarLoop]: 1792 mSDtfsCounter, 1091 mSDsluCounter, 9257 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 10047 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:24,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 10047 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1284 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 02:54:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-11-23 02:54:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 5069. [2021-11-23 02:54:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5069 states, 3233 states have (on average 1.3325085060315496) internal successors, (4308), 3350 states have internal predecessors, (4308), 1417 states have call successors, (1417), 409 states have call predecessors, (1417), 418 states have return successors, (1440), 1364 states have call predecessors, (1440), 1416 states have call successors, (1440) [2021-11-23 02:54:24,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 7165 transitions. [2021-11-23 02:54:24,816 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 7165 transitions. Word has length 147 [2021-11-23 02:54:24,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:24,819 INFO L470 AbstractCegarLoop]: Abstraction has 5069 states and 7165 transitions. [2021-11-23 02:54:24,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:54:24,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 7165 transitions. [2021-11-23 02:54:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-23 02:54:24,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:24,827 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:24,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:25,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:25,041 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:25,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2084420647, now seen corresponding path program 1 times [2021-11-23 02:54:25,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:25,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605844061] [2021-11-23 02:54:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:25,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:54:25,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:25,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605844061] [2021-11-23 02:54:25,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605844061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:54:25,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825459523] [2021-11-23 02:54:25,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:25,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:25,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:25,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:25,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:54:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:26,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:54:26,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:54:26,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:54:26,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825459523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:26,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:54:26,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-23 02:54:26,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321044955] [2021-11-23 02:54:26,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:26,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:54:26,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:26,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:54:26,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:54:26,708 INFO L87 Difference]: Start difference. First operand 5069 states and 7165 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:54:30,105 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 [] [2021-11-23 02:54:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:32,281 INFO L93 Difference]: Finished difference Result 11390 states and 16090 transitions. [2021-11-23 02:54:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:54:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 148 [2021-11-23 02:54:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:32,336 INFO L225 Difference]: With dead ends: 11390 [2021-11-23 02:54:32,337 INFO L226 Difference]: Without dead ends: 6604 [2021-11-23 02:54:32,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:54:32,359 INFO L933 BasicCegarLoop]: 1792 mSDtfsCounter, 1091 mSDsluCounter, 9257 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 10047 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:32,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 10047 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1284 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-23 02:54:32,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2021-11-23 02:54:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 5071. [2021-11-23 02:54:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 3235 states have (on average 1.3323029366306027) internal successors, (4310), 3350 states have internal predecessors, (4310), 1417 states have call successors, (1417), 409 states have call predecessors, (1417), 418 states have return successors, (1440), 1366 states have call predecessors, (1440), 1416 states have call successors, (1440) [2021-11-23 02:54:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 7167 transitions. [2021-11-23 02:54:32,648 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 7167 transitions. Word has length 148 [2021-11-23 02:54:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:32,649 INFO L470 AbstractCegarLoop]: Abstraction has 5071 states and 7167 transitions. [2021-11-23 02:54:32,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:54:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 7167 transitions. [2021-11-23 02:54:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-23 02:54:32,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:32,658 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:32,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 02:54:32,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:32,873 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash 214573415, now seen corresponding path program 1 times [2021-11-23 02:54:32,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:32,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271336912] [2021-11-23 02:54:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:32,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:54:33,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271336912] [2021-11-23 02:54:33,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271336912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:54:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266655986] [2021-11-23 02:54:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:33,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:33,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:33,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:33,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:54:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:54:34,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-23 02:54:34,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:54:34,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266655986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:34,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:54:34,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-23 02:54:34,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242705522] [2021-11-23 02:54:34,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:34,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:54:34,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:54:34,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:54:34,451 INFO L87 Difference]: Start difference. First operand 5071 states and 7167 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:54:37,883 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 [] [2021-11-23 02:54:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:39,861 INFO L93 Difference]: Finished difference Result 11396 states and 16096 transitions. [2021-11-23 02:54:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:54:39,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 149 [2021-11-23 02:54:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:39,910 INFO L225 Difference]: With dead ends: 11396 [2021-11-23 02:54:39,910 INFO L226 Difference]: Without dead ends: 6608 [2021-11-23 02:54:39,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:54:39,933 INFO L933 BasicCegarLoop]: 1792 mSDtfsCounter, 1091 mSDsluCounter, 9257 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 10047 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:39,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 10047 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1284 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 02:54:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2021-11-23 02:54:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 5073. [2021-11-23 02:54:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 3237 states have (on average 1.3320976212542477) internal successors, (4312), 3350 states have internal predecessors, (4312), 1417 states have call successors, (1417), 409 states have call predecessors, (1417), 418 states have return successors, (1440), 1368 states have call predecessors, (1440), 1416 states have call successors, (1440) [2021-11-23 02:54:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 7169 transitions. [2021-11-23 02:54:40,209 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 7169 transitions. Word has length 149 [2021-11-23 02:54:40,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:40,210 INFO L470 AbstractCegarLoop]: Abstraction has 5073 states and 7169 transitions. [2021-11-23 02:54:40,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:54:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 7169 transitions. [2021-11-23 02:54:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-23 02:54:40,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:40,219 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:40,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:40,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 02:54:40,432 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:40,433 INFO L85 PathProgramCache]: Analyzing trace with hash -579030723, now seen corresponding path program 1 times [2021-11-23 02:54:40,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:40,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014130153] [2021-11-23 02:54:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:40,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-23 02:54:40,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:40,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014130153] [2021-11-23 02:54:40,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014130153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:54:40,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500673109] [2021-11-23 02:54:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:40,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:40,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:40,686 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:40,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:54:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:41,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 2699 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:54:41,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-23 02:54:42,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:54:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 02:54:42,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500673109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:54:42,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841349673] [2021-11-23 02:54:42,946 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2021-11-23 02:54:42,946 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:54:42,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:54:42,960 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:54:42,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:54:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:54:47,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:54:47,562 INFO L244 Elim1Store]: Index analysis took 667 ms [2021-11-23 02:54:58,067 WARN L227 SmtUtils]: Spent 10.47s on a formula simplification. DAG size of input: 658 DAG size of output: 381 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:54:58,073 INFO L354 Elim1Store]: treesize reduction 1263, result has 33.9 percent of original size [2021-11-23 02:54:58,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1489 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 55 case distinctions, treesize of input 285 treesize of output 822 [2021-11-23 02:54:59,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:55:00,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:55:00,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:55:00,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:55:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:02,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:02,389 INFO L244 Elim1Store]: Index analysis took 1243 ms [2021-11-23 02:55:22,690 WARN L227 SmtUtils]: Spent 20.28s on a formula simplification. DAG size of input: 879 DAG size of output: 439 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:55:22,695 INFO L354 Elim1Store]: treesize reduction 2074, result has 25.4 percent of original size [2021-11-23 02:55:22,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 58 select indices, 58 select index equivalence classes, 1544 disjoint index pairs (out of 1653 index pairs), introduced 58 new quantified variables, introduced 165 case distinctions, treesize of input 304 treesize of output 901 [2021-11-23 02:55:23,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:55:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:55:24,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:55:24,338 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-23 02:55:24,406 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-23 02:55:24,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 02:55:24,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:55:24,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-23 02:55:24,975 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-23 02:55:26,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:26,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:26,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:55:26,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:26,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:26,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:27,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:55:27,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:27,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:27,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:27,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:27,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:29,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:29,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:29,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:55:29,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:29,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:29,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:30,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:30,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:55:30,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:30,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:30,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:30,582 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:32,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:32,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:55:32,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:32,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:32,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:32,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:33,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:33,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:55:33,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:33,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:33,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:33,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:34,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:34,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:34,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:55:35,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:35,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:55:35,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:37,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:37,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:37,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:55:37,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:37,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:37,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:38,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:38,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:55:39,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:55:39,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:39,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:39,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:55:47,190 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-23 02:55:47,529 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-23 02:55:47,624 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_memset with input of size 359 for LOIs [2021-11-23 02:55:49,174 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_init_zalloc with input of size 279 for LOIs [2021-11-23 02:55:50,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:55:51,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 02:55:52,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:55:52,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 02:55:54,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 02:55:54,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:55:57,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 02:55:57,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:55:57,667 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 290 for LOIs [2021-11-23 02:55:58,160 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 266 for LOIs [2021-11-23 02:55:58,320 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 359 for LOIs [2021-11-23 02:55:58,752 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:56:07,696 WARN L227 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 279 DAG size of output: 274 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:56:16,074 WARN L227 SmtUtils]: Spent 7.46s on a formula simplification. DAG size of input: 296 DAG size of output: 291 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:56:24,660 WARN L227 SmtUtils]: Spent 7.59s on a formula simplification. DAG size of input: 290 DAG size of output: 287 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:56:33,505 WARN L227 SmtUtils]: Spent 7.74s on a formula simplification. DAG size of input: 292 DAG size of output: 289 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:57:00,556 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 323 DAG size of output: 306 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:57:11,017 WARN L227 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 344 DAG size of output: 320 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:57:30,769 WARN L227 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 386 DAG size of output: 352 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:57:43,095 WARN L227 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 407 DAG size of output: 367 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:58:03,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1841349673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:58:03,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:58:03,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [8, 10, 10] total 45 [2021-11-23 02:58:03,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348078579] [2021-11-23 02:58:03,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:58:03,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 02:58:03,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:58:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 02:58:03,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 02:58:03,614 INFO L87 Difference]: Start difference. First operand 5073 states and 7169 transitions. Second operand has 29 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 11 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-23 02:58:27,455 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 [] [2021-11-23 02:58:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:46,750 INFO L93 Difference]: Finished difference Result 10146 states and 14334 transitions. [2021-11-23 02:58:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 02:58:46,751 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 11 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) Word has length 163 [2021-11-23 02:58:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:46,781 INFO L225 Difference]: With dead ends: 10146 [2021-11-23 02:58:46,781 INFO L226 Difference]: Without dead ends: 5087 [2021-11-23 02:58:46,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 450 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 125.1s TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 02:58:46,805 INFO L933 BasicCegarLoop]: 1108 mSDtfsCounter, 5 mSDsluCounter, 15579 mSDsCounter, 0 mSdLazyCounter, 6291 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 15660 SdHoareTripleChecker+Invalid, 8107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 6291 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1802 IncrementalHoareTripleChecker+Unchecked, 42.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:46,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 15660 Invalid, 8107 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [13 Valid, 6291 Invalid, 1 Unknown, 1802 Unchecked, 42.5s Time] [2021-11-23 02:58:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5087 states. [2021-11-23 02:58:47,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5087 to 5087. [2021-11-23 02:58:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5087 states, 3245 states have (on average 1.3312788906009245) internal successors, (4320), 3357 states have internal predecessors, (4320), 1420 states have call successors, (1420), 414 states have call predecessors, (1420), 421 states have return successors, (1443), 1370 states have call predecessors, (1443), 1419 states have call successors, (1443) [2021-11-23 02:58:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5087 states to 5087 states and 7183 transitions. [2021-11-23 02:58:47,111 INFO L78 Accepts]: Start accepts. Automaton has 5087 states and 7183 transitions. Word has length 163 [2021-11-23 02:58:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:47,112 INFO L470 AbstractCegarLoop]: Abstraction has 5087 states and 7183 transitions. [2021-11-23 02:58:47,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 11 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-23 02:58:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 5087 states and 7183 transitions. [2021-11-23 02:58:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 02:58:47,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:47,122 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:47,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:58:47,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:58:47,338 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:47,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:47,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1715709402, now seen corresponding path program 1 times [2021-11-23 02:58:47,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:58:47,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670109182] [2021-11-23 02:58:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:47,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:58:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-23 02:58:47,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:58:47,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670109182] [2021-11-23 02:58:47,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670109182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:58:47,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160082748] [2021-11-23 02:58:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:47,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:58:47,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:58:47,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:58:47,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:58:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:48,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 2705 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:58:48,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:58:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-23 02:58:49,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:58:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-23 02:58:49,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160082748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:58:49,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [958917048] [2021-11-23 02:58:49,822 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2021-11-23 02:58:49,822 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:58:49,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:58:49,823 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:58:49,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:58:53,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:58:54,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:54,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:54,272 INFO L244 Elim1Store]: Index analysis took 923 ms [2021-11-23 02:59:09,688 WARN L227 SmtUtils]: Spent 15.40s on a formula simplification. DAG size of input: 658 DAG size of output: 381 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:59:09,689 INFO L354 Elim1Store]: treesize reduction 1263, result has 33.9 percent of original size [2021-11-23 02:59:09,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 55 select indices, 55 select index equivalence classes, 1489 disjoint index pairs (out of 1485 index pairs), introduced 55 new quantified variables, introduced 55 case distinctions, treesize of input 285 treesize of output 822 [2021-11-23 02:59:10,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:59:10,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:59:11,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:59:12,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 02:59:16,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:17,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:18,161 INFO L244 Elim1Store]: Index analysis took 5733 ms [2021-11-23 03:00:19,436 WARN L227 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 879 DAG size of output: 439 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:00:19,438 INFO L354 Elim1Store]: treesize reduction 2074, result has 25.4 percent of original size [2021-11-23 03:00:19,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 58 select indices, 58 select index equivalence classes, 1544 disjoint index pairs (out of 1653 index pairs), introduced 58 new quantified variables, introduced 165 case distinctions, treesize of input 304 treesize of output 901 [2021-11-23 03:00:20,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:00:20,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 03:00:20,602 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-23 03:00:20,659 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-23 03:00:20,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:00:20,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:00:20,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-23 03:00:21,072 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-23 03:00:22,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:22,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:22,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:22,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:22,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:22,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:22,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:23,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:23,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:23,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:23,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:23,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:23,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:23,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:23,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:24,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:24,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:24,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:25,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:25,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:25,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:25,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:25,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:25,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:26,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:26,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:26,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:27,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:27,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:27,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:28,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:28,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:28,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:28,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:28,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:28,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:29,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:00:29,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:00:29,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:00:29,557 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-23 03:00:29,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 97 [2021-11-23 03:00:29,581 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-23 03:00:29,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2021-11-23 03:00:29,604 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-23 03:00:29,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-11-23 03:00:29,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:00:29,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:00:29,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:00:30,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:30,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:00:34,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:34,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:35,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:35,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:37,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:37,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:38,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:38,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 03:00:55,573 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-23 03:00:55,831 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 53 [2021-11-23 03:00:55,884 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_memset with input of size 442 for LOIs [2021-11-23 03:00:59,166 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_irq_1 with input of size 303 for LOIs [2021-11-23 03:00:59,736 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_init_zalloc with input of size 279 for LOIs [2021-11-23 03:01:00,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:01:01,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:01:02,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:01:02,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:01:04,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:01:04,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:01:07,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:01:07,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:01:07,441 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 290 for LOIs [2021-11-23 03:01:07,882 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 266 for LOIs [2021-11-23 03:01:08,026 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 442 for LOIs [2021-11-23 03:01:08,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:01:08,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:01:08,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-23 03:01:08,932 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:01:18,032 WARN L227 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 279 DAG size of output: 274 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:01:26,033 WARN L227 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 296 DAG size of output: 291 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:01:34,895 WARN L227 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 290 DAG size of output: 287 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:01:43,847 WARN L227 SmtUtils]: Spent 7.76s on a formula simplification. DAG size of input: 292 DAG size of output: 289 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:02:51,824 WARN L227 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 442 DAG size of output: 297 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:03:08,379 WARN L227 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 456 DAG size of output: 306 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:03:45,774 WARN L227 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 418 DAG size of output: 303 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:04:20,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [958917048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:04:20,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:04:20,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [8, 10, 10] total 65 [2021-11-23 03:04:20,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420184107] [2021-11-23 03:04:20,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:04:20,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 03:04:20,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:04:20,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 03:04:20,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=3811, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 03:04:20,380 INFO L87 Difference]: Start difference. First operand 5087 states and 7183 transitions. Second operand has 49 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2021-11-23 03:05:02,081 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 [] [2021-11-23 03:05:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:05:16,024 INFO L93 Difference]: Finished difference Result 10277 states and 14529 transitions. [2021-11-23 03:05:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 03:05:16,025 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) Word has length 164 [2021-11-23 03:05:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:05:16,044 INFO L225 Difference]: With dead ends: 10277 [2021-11-23 03:05:16,044 INFO L226 Difference]: Without dead ends: 5225 [2021-11-23 03:05:16,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 431 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 214.2s TimeCoverageRelationStatistics Valid=435, Invalid=4677, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 03:05:16,061 INFO L933 BasicCegarLoop]: 1085 mSDtfsCounter, 74 mSDsluCounter, 15840 mSDsCounter, 0 mSdLazyCounter, 6164 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 15660 SdHoareTripleChecker+Invalid, 9115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 6164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 2895 IncrementalHoareTripleChecker+Unchecked, 32.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:05:16,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 15660 Invalid, 9115 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [55 Valid, 6164 Invalid, 1 Unknown, 2895 Unchecked, 32.5s Time] [2021-11-23 03:05:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2021-11-23 03:05:16,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 5180. [2021-11-23 03:05:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5180 states, 3334 states have (on average 1.3314337132573486) internal successors, (4439), 3446 states have internal predecessors, (4439), 1422 states have call successors, (1422), 416 states have call predecessors, (1422), 423 states have return successors, (1445), 1372 states have call predecessors, (1445), 1421 states have call successors, (1445) [2021-11-23 03:05:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5180 states to 5180 states and 7306 transitions. [2021-11-23 03:05:16,451 INFO L78 Accepts]: Start accepts. Automaton has 5180 states and 7306 transitions. Word has length 164 [2021-11-23 03:05:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:05:16,452 INFO L470 AbstractCegarLoop]: Abstraction has 5180 states and 7306 transitions. [2021-11-23 03:05:16,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2021-11-23 03:05:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 5180 states and 7306 transitions. [2021-11-23 03:05:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-23 03:05:16,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:05:16,461 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:05:16,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:05:16,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:05:16,676 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:05:16,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:05:16,676 INFO L85 PathProgramCache]: Analyzing trace with hash 673339367, now seen corresponding path program 1 times [2021-11-23 03:05:16,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:05:16,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293608468] [2021-11-23 03:05:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:05:16,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:05:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-23 03:05:16,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:05:16,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293608468] [2021-11-23 03:05:16,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293608468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:05:16,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436917785] [2021-11-23 03:05:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:05:16,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:05:16,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:05:16,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:05:16,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67206d64-230b-4591-b284-f3aa93697445/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:05:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:17,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 2707 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:05:17,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:05:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-23 03:05:18,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:05:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-23 03:05:18,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436917785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:05:18,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977078178] [2021-11-23 03:05:18,533 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2021-11-23 03:05:18,533 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:05:18,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:05:18,534 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:05:18,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:05:23,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:24,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:24,585 INFO L244 Elim1Store]: Index analysis took 3322 ms