./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:41:27,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:41:27,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:41:27,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:41:27,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:41:27,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:41:27,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:41:27,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:41:27,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:41:27,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:41:27,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:41:27,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:41:27,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:41:27,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:41:27,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:41:27,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:41:27,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:41:27,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:41:27,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:41:27,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:41:27,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:41:27,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:41:27,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:41:27,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:41:27,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:41:27,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:41:27,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:41:27,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:41:27,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:41:27,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:41:27,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:41:27,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:41:27,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:41:27,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:41:27,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:41:27,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:41:27,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:41:27,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:41:27,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:41:27,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:41:27,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:41:27,431 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:41:27,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:41:27,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:41:27,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:41:27,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:41:27,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:41:27,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:41:27,462 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:41:27,462 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:41:27,462 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:41:27,463 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:41:27,463 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:41:27,463 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:41:27,464 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:41:27,464 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:41:27,464 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:41:27,465 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:41:27,465 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:41:27,466 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:41:27,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:41:27,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:41:27,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:41:27,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:41:27,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:41:27,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:41:27,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:41:27,469 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:41:27,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:41:27,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:41:27,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:41:27,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:27,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:41:27,471 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:41:27,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:41:27,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:41:27,472 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:41:27,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:41:27,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:41:27,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:41:27,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d [2022-11-03 02:41:27,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:41:27,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:41:27,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:41:27,876 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:41:27,878 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:41:27,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2022-11-03 02:41:27,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/data/e8dfd3835/1ab7b1896b804c129310fd0906ab9c96/FLAGe4ddbf138 [2022-11-03 02:41:28,896 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:41:28,897 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2022-11-03 02:41:28,942 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/data/e8dfd3835/1ab7b1896b804c129310fd0906ab9c96/FLAGe4ddbf138 [2022-11-03 02:41:29,367 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/data/e8dfd3835/1ab7b1896b804c129310fd0906ab9c96 [2022-11-03 02:41:29,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:41:29,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:41:29,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:29,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:41:29,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:41:29,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:29" (1/1) ... [2022-11-03 02:41:29,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af19ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:29, skipping insertion in model container [2022-11-03 02:41:29,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:29" (1/1) ... [2022-11-03 02:41:29,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:41:29,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:41:30,711 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_daa2418b-00bf-4a58-afb7-dfca69470c76/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2022-11-03 02:41:31,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:31,581 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:41:31,838 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_daa2418b-00bf-4a58-afb7-dfca69470c76/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2022-11-03 02:41:32,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:32,263 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:41:32,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32 WrapperNode [2022-11-03 02:41:32,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:32,265 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:32,265 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:41:32,265 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:41:32,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (1/1) ... [2022-11-03 02:41:32,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (1/1) ... [2022-11-03 02:41:32,505 INFO L138 Inliner]: procedures = 197, calls = 1031, calls flagged for inlining = 87, calls inlined = 80, statements flattened = 2429 [2022-11-03 02:41:32,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:32,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:41:32,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:41:32,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:41:32,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (1/1) ... [2022-11-03 02:41:32,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (1/1) ... [2022-11-03 02:41:32,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (1/1) ... [2022-11-03 02:41:32,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (1/1) ... [2022-11-03 02:41:32,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (1/1) ... [2022-11-03 02:41:32,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (1/1) ... [2022-11-03 02:41:32,651 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (1/1) ... [2022-11-03 02:41:32,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (1/1) ... [2022-11-03 02:41:32,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:41:32,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:41:32,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:41:32,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:41:32,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (1/1) ... [2022-11-03 02:41:32,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:32,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:32,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:41:32,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:41:32,817 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-03 02:41:32,817 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-03 02:41:32,818 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 02:41:32,819 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 02:41:32,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:41:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:41:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:41:32,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:41:32,820 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-03 02:41:32,821 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-03 02:41:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-03 02:41:32,821 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-03 02:41:32,821 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-11-03 02:41:32,821 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-11-03 02:41:32,822 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:41:32,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:41:32,823 INFO L130 BoogieDeclarations]: Found specification of procedure pull_skb [2022-11-03 02:41:32,823 INFO L138 BoogieDeclarations]: Found implementation of procedure pull_skb [2022-11-03 02:41:32,823 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-03 02:41:32,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-03 02:41:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure free_skb_pool [2022-11-03 02:41:32,824 INFO L138 BoogieDeclarations]: Found implementation of procedure free_skb_pool [2022-11-03 02:41:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-03 02:41:32,824 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-03 02:41:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:41:32,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:41:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2022-11-03 02:41:32,825 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2022-11-03 02:41:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2022-11-03 02:41:32,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2022-11-03 02:41:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2022-11-03 02:41:32,827 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2022-11-03 02:41:32,827 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 02:41:32,827 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 02:41:32,827 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:41:32,827 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:41:32,828 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-03 02:41:32,828 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-03 02:41:32,829 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2022-11-03 02:41:32,829 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2022-11-03 02:41:32,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:41:32,829 INFO L130 BoogieDeclarations]: Found specification of procedure fill_skb_pool [2022-11-03 02:41:32,829 INFO L138 BoogieDeclarations]: Found implementation of procedure fill_skb_pool [2022-11-03 02:41:32,830 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-03 02:41:32,830 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-03 02:41:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:41:32,831 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-03 02:41:32,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-03 02:41:32,833 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-03 02:41:32,834 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-03 02:41:32,834 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-03 02:41:32,835 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-03 02:41:32,836 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_set_mac_address [2022-11-03 02:41:32,836 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_set_mac_address [2022-11-03 02:41:32,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:41:32,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:41:32,837 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_set_multicast [2022-11-03 02:41:32,837 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_set_multicast [2022-11-03 02:41:32,838 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-03 02:41:32,838 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-03 02:41:32,838 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:41:32,838 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:41:32,839 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2022-11-03 02:41:32,839 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2022-11-03 02:41:32,839 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 02:41:32,839 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 02:41:32,839 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-03 02:41:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-03 02:41:32,840 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 02:41:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 02:41:32,840 INFO L130 BoogieDeclarations]: Found specification of procedure free_all_urbs [2022-11-03 02:41:32,840 INFO L138 BoogieDeclarations]: Found implementation of procedure free_all_urbs [2022-11-03 02:41:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure __printk_ratelimit [2022-11-03 02:41:32,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __printk_ratelimit [2022-11-03 02:41:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-03 02:41:32,843 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-03 02:41:32,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:41:32,843 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 02:41:32,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 02:41:32,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:41:32,844 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_tx_timeout [2022-11-03 02:41:32,844 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_tx_timeout [2022-11-03 02:41:32,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:41:32,846 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-03 02:41:32,846 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-03 02:41:32,846 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_ioctl [2022-11-03 02:41:32,846 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_ioctl [2022-11-03 02:41:32,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:41:32,848 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:41:32,848 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-03 02:41:32,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-03 02:41:32,849 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 02:41:32,850 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 02:41:32,850 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 02:41:32,850 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 02:41:32,850 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 02:41:32,850 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 02:41:32,851 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:41:32,851 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:41:32,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:41:32,851 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_reset [2022-11-03 02:41:32,851 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_reset [2022-11-03 02:41:32,852 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:41:32,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:41:32,852 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_disconnect [2022-11-03 02:41:32,853 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_disconnect [2022-11-03 02:41:32,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:41:32,853 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-11-03 02:41:32,853 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-11-03 02:41:32,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:41:32,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:41:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2022-11-03 02:41:32,859 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2022-11-03 02:41:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-03 02:41:32,859 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-03 02:41:32,861 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-03 02:41:32,862 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-03 02:41:32,862 INFO L130 BoogieDeclarations]: Found specification of procedure get_registers [2022-11-03 02:41:32,862 INFO L138 BoogieDeclarations]: Found implementation of procedure get_registers [2022-11-03 02:41:32,863 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 02:41:32,868 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 02:41:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:41:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure set_registers [2022-11-03 02:41:32,869 INFO L138 BoogieDeclarations]: Found implementation of procedure set_registers [2022-11-03 02:41:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:41:32,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:41:33,694 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:41:33,702 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:41:33,926 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:41:37,074 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:41:37,795 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:41:37,795 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:41:37,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:37 BoogieIcfgContainer [2022-11-03 02:41:37,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:41:37,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:41:37,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:41:37,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:41:37,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:41:29" (1/3) ... [2022-11-03 02:41:37,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc47159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:37, skipping insertion in model container [2022-11-03 02:41:37,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:32" (2/3) ... [2022-11-03 02:41:37,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc47159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:37, skipping insertion in model container [2022-11-03 02:41:37,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:37" (3/3) ... [2022-11-03 02:41:37,825 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2022-11-03 02:41:37,850 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:41:37,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:41:37,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:41:37,949 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@312dc45b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:41:37,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:41:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 666 states, 422 states have (on average 1.3554502369668247) internal successors, (572), 438 states have internal predecessors, (572), 188 states have call successors, (188), 55 states have call predecessors, (188), 54 states have return successors, (183), 181 states have call predecessors, (183), 183 states have call successors, (183) [2022-11-03 02:41:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:41:37,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:37,974 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:37,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:37,982 INFO L85 PathProgramCache]: Analyzing trace with hash -782051548, now seen corresponding path program 1 times [2022-11-03 02:41:37,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:37,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099893288] [2022-11-03 02:41:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:37,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:41:38,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:38,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099893288] [2022-11-03 02:41:38,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099893288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:38,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:38,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:38,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020712385] [2022-11-03 02:41:38,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:38,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:38,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:38,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:38,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:38,847 INFO L87 Difference]: Start difference. First operand has 666 states, 422 states have (on average 1.3554502369668247) internal successors, (572), 438 states have internal predecessors, (572), 188 states have call successors, (188), 55 states have call predecessors, (188), 54 states have return successors, (183), 181 states have call predecessors, (183), 183 states have call successors, (183) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:41:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:41,682 INFO L93 Difference]: Finished difference Result 1956 states and 2791 transitions. [2022-11-03 02:41:41,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:41,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 48 [2022-11-03 02:41:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:41,717 INFO L225 Difference]: With dead ends: 1956 [2022-11-03 02:41:41,718 INFO L226 Difference]: Without dead ends: 1290 [2022-11-03 02:41:41,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:41,736 INFO L413 NwaCegarLoop]: 1000 mSDtfsCounter, 898 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:41,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 1814 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:41:41,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-11-03 02:41:42,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1290. [2022-11-03 02:41:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 826 states have (on average 1.3329297820823245) internal successors, (1101), 844 states have internal predecessors, (1101), 357 states have call successors, (357), 107 states have call predecessors, (357), 106 states have return successors, (356), 352 states have call predecessors, (356), 356 states have call successors, (356) [2022-11-03 02:41:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1814 transitions. [2022-11-03 02:41:42,160 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1814 transitions. Word has length 48 [2022-11-03 02:41:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:42,162 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 1814 transitions. [2022-11-03 02:41:42,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:41:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1814 transitions. [2022-11-03 02:41:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:41:42,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:42,180 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:42,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:41:42,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2105907500, now seen corresponding path program 1 times [2022-11-03 02:41:42,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:42,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144076413] [2022-11-03 02:41:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:42,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:41:43,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144076413] [2022-11-03 02:41:43,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144076413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:43,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:43,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:41:43,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071190208] [2022-11-03 02:41:43,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:43,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:43,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:43,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:43,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:43,054 INFO L87 Difference]: Start difference. First operand 1290 states and 1814 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:41:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:46,687 INFO L93 Difference]: Finished difference Result 2566 states and 3627 transitions. [2022-11-03 02:41:46,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:41:46,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2022-11-03 02:41:46,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:46,711 INFO L225 Difference]: With dead ends: 2566 [2022-11-03 02:41:46,712 INFO L226 Difference]: Without dead ends: 2561 [2022-11-03 02:41:46,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:46,717 INFO L413 NwaCegarLoop]: 998 mSDtfsCounter, 906 mSDsluCounter, 2014 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 2794 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:46,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 2794 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 02:41:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2022-11-03 02:41:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2553. [2022-11-03 02:41:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 1633 states have (on average 1.333129210042866) internal successors, (2177), 1669 states have internal predecessors, (2177), 707 states have call successors, (707), 213 states have call predecessors, (707), 212 states have return successors, (726), 698 states have call predecessors, (726), 706 states have call successors, (726) [2022-11-03 02:41:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 3610 transitions. [2022-11-03 02:41:46,926 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 3610 transitions. Word has length 57 [2022-11-03 02:41:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:46,927 INFO L495 AbstractCegarLoop]: Abstraction has 2553 states and 3610 transitions. [2022-11-03 02:41:46,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:41:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 3610 transitions. [2022-11-03 02:41:46,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:41:46,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:46,942 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:46,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:41:46,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:46,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:46,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1926188460, now seen corresponding path program 1 times [2022-11-03 02:41:46,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:46,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966861954] [2022-11-03 02:41:46,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:46,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:41:47,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:47,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966861954] [2022-11-03 02:41:47,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966861954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:47,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:47,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:47,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482716057] [2022-11-03 02:41:47,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:47,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:47,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:47,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:47,404 INFO L87 Difference]: Start difference. First operand 2553 states and 3610 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:41:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:50,255 INFO L93 Difference]: Finished difference Result 6635 states and 9323 transitions. [2022-11-03 02:41:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:50,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 122 [2022-11-03 02:41:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:50,285 INFO L225 Difference]: With dead ends: 6635 [2022-11-03 02:41:50,286 INFO L226 Difference]: Without dead ends: 4096 [2022-11-03 02:41:50,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:50,300 INFO L413 NwaCegarLoop]: 964 mSDtfsCounter, 555 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:50,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 1744 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:41:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4096 states. [2022-11-03 02:41:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4096 to 4089. [2022-11-03 02:41:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4089 states, 2607 states have (on average 1.3291139240506329) internal successors, (3465), 2659 states have internal predecessors, (3465), 1120 states have call successors, (1120), 362 states have call predecessors, (1120), 361 states have return successors, (1139), 1107 states have call predecessors, (1139), 1119 states have call successors, (1139) [2022-11-03 02:41:50,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 5724 transitions. [2022-11-03 02:41:50,590 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 5724 transitions. Word has length 122 [2022-11-03 02:41:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:50,593 INFO L495 AbstractCegarLoop]: Abstraction has 4089 states and 5724 transitions. [2022-11-03 02:41:50,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:41:50,594 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 5724 transitions. [2022-11-03 02:41:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:41:50,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:50,662 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:50,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:41:50,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:50,665 INFO L85 PathProgramCache]: Analyzing trace with hash -947411894, now seen corresponding path program 1 times [2022-11-03 02:41:50,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:50,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292704640] [2022-11-03 02:41:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:50,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 02:41:51,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:51,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292704640] [2022-11-03 02:41:51,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292704640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:51,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:51,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:51,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833236090] [2022-11-03 02:41:51,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:51,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:51,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:51,171 INFO L87 Difference]: Start difference. First operand 4089 states and 5724 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:41:55,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:55,139 INFO L93 Difference]: Finished difference Result 9877 states and 13777 transitions. [2022-11-03 02:41:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 134 [2022-11-03 02:41:55,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:55,179 INFO L225 Difference]: With dead ends: 9877 [2022-11-03 02:41:55,180 INFO L226 Difference]: Without dead ends: 5808 [2022-11-03 02:41:55,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:55,197 INFO L413 NwaCegarLoop]: 1272 mSDtfsCounter, 700 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:55,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1964 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-03 02:41:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2022-11-03 02:41:55,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5801. [2022-11-03 02:41:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5801 states, 3711 states have (on average 1.326866073834546) internal successors, (4924), 3779 states have internal predecessors, (4924), 1552 states have call successors, (1552), 538 states have call predecessors, (1552), 537 states have return successors, (1575), 1535 states have call predecessors, (1575), 1551 states have call successors, (1575) [2022-11-03 02:41:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5801 states to 5801 states and 8051 transitions. [2022-11-03 02:41:55,590 INFO L78 Accepts]: Start accepts. Automaton has 5801 states and 8051 transitions. Word has length 134 [2022-11-03 02:41:55,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:55,591 INFO L495 AbstractCegarLoop]: Abstraction has 5801 states and 8051 transitions. [2022-11-03 02:41:55,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:41:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 5801 states and 8051 transitions. [2022-11-03 02:41:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 02:41:55,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:55,619 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:55,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:41:55,620 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:55,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:55,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2097383598, now seen corresponding path program 1 times [2022-11-03 02:41:55,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:55,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804981664] [2022-11-03 02:41:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:55,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 02:41:57,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:57,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804981664] [2022-11-03 02:41:57,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804981664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:57,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400790887] [2022-11-03 02:41:57,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:57,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:57,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:57,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:57,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:41:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:58,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 2289 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:41:58,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 02:41:58,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:58,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400790887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:58,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:41:58,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-03 02:41:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969487956] [2022-11-03 02:41:58,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:58,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:41:58,421 INFO L87 Difference]: Start difference. First operand 5801 states and 8051 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:42:00,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:42:01,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:01,601 INFO L93 Difference]: Finished difference Result 11630 states and 16166 transitions. [2022-11-03 02:42:01,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:01,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 147 [2022-11-03 02:42:01,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:01,645 INFO L225 Difference]: With dead ends: 11630 [2022-11-03 02:42:01,645 INFO L226 Difference]: Without dead ends: 5849 [2022-11-03 02:42:01,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:42:01,672 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 3 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:01,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1616 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 02:42:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2022-11-03 02:42:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 5813. [2022-11-03 02:42:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5813 states, 3723 states have (on average 1.325812516787537) internal successors, (4936), 3791 states have internal predecessors, (4936), 1552 states have call successors, (1552), 538 states have call predecessors, (1552), 537 states have return successors, (1575), 1535 states have call predecessors, (1575), 1551 states have call successors, (1575) [2022-11-03 02:42:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5813 states to 5813 states and 8063 transitions. [2022-11-03 02:42:02,136 INFO L78 Accepts]: Start accepts. Automaton has 5813 states and 8063 transitions. Word has length 147 [2022-11-03 02:42:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:02,137 INFO L495 AbstractCegarLoop]: Abstraction has 5813 states and 8063 transitions. [2022-11-03 02:42:02,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:42:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5813 states and 8063 transitions. [2022-11-03 02:42:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-03 02:42:02,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:02,159 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:02,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:42:02,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:02,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:02,380 INFO L85 PathProgramCache]: Analyzing trace with hash -618923304, now seen corresponding path program 1 times [2022-11-03 02:42:02,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:02,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527585875] [2022-11-03 02:42:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:02,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 02:42:03,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527585875] [2022-11-03 02:42:03,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527585875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357337632] [2022-11-03 02:42:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:03,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:03,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:03,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:03,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:42:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:04,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:42:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 02:42:04,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:04,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357337632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:04,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:04,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-03 02:42:04,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229691759] [2022-11-03 02:42:04,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:04,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:04,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:04,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:42:04,949 INFO L87 Difference]: Start difference. First operand 5813 states and 8063 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:42:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:07,172 INFO L93 Difference]: Finished difference Result 8735 states and 12148 transitions. [2022-11-03 02:42:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:07,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 148 [2022-11-03 02:42:07,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:07,220 INFO L225 Difference]: With dead ends: 8735 [2022-11-03 02:42:07,220 INFO L226 Difference]: Without dead ends: 5829 [2022-11-03 02:42:07,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:42:07,240 INFO L413 NwaCegarLoop]: 810 mSDtfsCounter, 4 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:07,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1614 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:42:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5829 states. [2022-11-03 02:42:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5829 to 5829. [2022-11-03 02:42:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5829 states, 3735 states have (on average 1.3247657295850066) internal successors, (4948), 3807 states have internal predecessors, (4948), 1552 states have call successors, (1552), 538 states have call predecessors, (1552), 541 states have return successors, (1581), 1535 states have call predecessors, (1581), 1551 states have call successors, (1581) [2022-11-03 02:42:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5829 states to 5829 states and 8081 transitions. [2022-11-03 02:42:07,616 INFO L78 Accepts]: Start accepts. Automaton has 5829 states and 8081 transitions. Word has length 148 [2022-11-03 02:42:07,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:07,618 INFO L495 AbstractCegarLoop]: Abstraction has 5829 states and 8081 transitions. [2022-11-03 02:42:07,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:42:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 5829 states and 8081 transitions. [2022-11-03 02:42:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-03 02:42:07,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:07,639 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:07,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:07,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:42:07,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash -713023536, now seen corresponding path program 1 times [2022-11-03 02:42:07,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:07,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608633404] [2022-11-03 02:42:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:07,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 02:42:09,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:09,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608633404] [2022-11-03 02:42:09,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608633404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:09,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913768760] [2022-11-03 02:42:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:09,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:09,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:09,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:09,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:42:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:10,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 2318 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:42:10,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:42:10,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:10,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913768760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:10,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:10,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 02:42:10,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451751194] [2022-11-03 02:42:10,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:10,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:42:10,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:10,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:42:10,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:42:10,624 INFO L87 Difference]: Start difference. First operand 5829 states and 8081 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:42:18,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:18,443 INFO L93 Difference]: Finished difference Result 11728 states and 16282 transitions. [2022-11-03 02:42:18,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:42:18,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 149 [2022-11-03 02:42:18,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:18,484 INFO L225 Difference]: With dead ends: 11728 [2022-11-03 02:42:18,485 INFO L226 Difference]: Without dead ends: 5919 [2022-11-03 02:42:18,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:42:18,511 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 1044 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 2421 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 1961 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 2421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:18,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 1961 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 2421 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-03 02:42:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2022-11-03 02:42:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 5835. [2022-11-03 02:42:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5835 states, 3739 states have (on average 1.32281358652046) internal successors, (4946), 3811 states have internal predecessors, (4946), 1554 states have call successors, (1554), 538 states have call predecessors, (1554), 541 states have return successors, (1563), 1537 states have call predecessors, (1563), 1553 states have call successors, (1563) [2022-11-03 02:42:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5835 states to 5835 states and 8063 transitions. [2022-11-03 02:42:18,959 INFO L78 Accepts]: Start accepts. Automaton has 5835 states and 8063 transitions. Word has length 149 [2022-11-03 02:42:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:18,960 INFO L495 AbstractCegarLoop]: Abstraction has 5835 states and 8063 transitions. [2022-11-03 02:42:18,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 02:42:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 5835 states and 8063 transitions. [2022-11-03 02:42:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-03 02:42:18,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:18,983 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:19,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:19,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:42:19,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:19,201 INFO L85 PathProgramCache]: Analyzing trace with hash -5669143, now seen corresponding path program 1 times [2022-11-03 02:42:19,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:19,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123022465] [2022-11-03 02:42:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:19,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-03 02:42:19,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:19,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123022465] [2022-11-03 02:42:19,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123022465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:19,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:19,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:42:19,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119562881] [2022-11-03 02:42:19,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:19,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:42:19,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:19,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:42:19,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:42:19,712 INFO L87 Difference]: Start difference. First operand 5835 states and 8063 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:42:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:25,605 INFO L93 Difference]: Finished difference Result 19997 states and 29550 transitions. [2022-11-03 02:42:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:42:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 196 [2022-11-03 02:42:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:25,711 INFO L225 Difference]: With dead ends: 19997 [2022-11-03 02:42:25,711 INFO L226 Difference]: Without dead ends: 14182 [2022-11-03 02:42:25,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:25,747 INFO L413 NwaCegarLoop]: 1454 mSDtfsCounter, 1221 mSDsluCounter, 2833 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 3975 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:25,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 3975 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-03 02:42:25,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14182 states. [2022-11-03 02:42:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14182 to 5843. [2022-11-03 02:42:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5843 states, 3747 states have (on average 1.3221243661595943) internal successors, (4954), 3819 states have internal predecessors, (4954), 1554 states have call successors, (1554), 538 states have call predecessors, (1554), 541 states have return successors, (1563), 1537 states have call predecessors, (1563), 1553 states have call successors, (1563) [2022-11-03 02:42:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5843 states to 5843 states and 8071 transitions. [2022-11-03 02:42:26,526 INFO L78 Accepts]: Start accepts. Automaton has 5843 states and 8071 transitions. Word has length 196 [2022-11-03 02:42:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:26,527 INFO L495 AbstractCegarLoop]: Abstraction has 5843 states and 8071 transitions. [2022-11-03 02:42:26,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:42:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 5843 states and 8071 transitions. [2022-11-03 02:42:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:42:26,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:26,550 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:26,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:42:26,551 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash -179638435, now seen corresponding path program 1 times [2022-11-03 02:42:26,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:26,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213516902] [2022-11-03 02:42:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:26,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-11-03 02:42:27,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:27,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213516902] [2022-11-03 02:42:27,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213516902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:27,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585671984] [2022-11-03 02:42:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:27,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:27,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:27,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:27,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:42:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:28,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 2867 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:42:28,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 02:42:29,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:29,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585671984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:29,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:29,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-03 02:42:29,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112891788] [2022-11-03 02:42:29,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:29,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:42:29,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:29,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:42:29,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:42:29,176 INFO L87 Difference]: Start difference. First operand 5843 states and 8071 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:42:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:38,727 INFO L93 Difference]: Finished difference Result 23000 states and 33041 transitions. [2022-11-03 02:42:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:42:38,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 218 [2022-11-03 02:42:38,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:38,865 INFO L225 Difference]: With dead ends: 23000 [2022-11-03 02:42:38,865 INFO L226 Difference]: Without dead ends: 22995 [2022-11-03 02:42:38,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:42:38,879 INFO L413 NwaCegarLoop]: 1881 mSDtfsCounter, 2559 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 2245 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2651 SdHoareTripleChecker+Valid, 4595 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:38,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2651 Valid, 4595 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2245 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-11-03 02:42:38,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22995 states. [2022-11-03 02:42:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22995 to 17471. [2022-11-03 02:42:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17471 states, 11203 states have (on average 1.322592162813532) internal successors, (14817), 11427 states have internal predecessors, (14817), 4646 states have call successors, (4646), 1610 states have call predecessors, (4646), 1621 states have return successors, (4675), 4589 states have call predecessors, (4675), 4645 states have call successors, (4675) [2022-11-03 02:42:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17471 states to 17471 states and 24138 transitions. [2022-11-03 02:42:40,448 INFO L78 Accepts]: Start accepts. Automaton has 17471 states and 24138 transitions. Word has length 218 [2022-11-03 02:42:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:40,449 INFO L495 AbstractCegarLoop]: Abstraction has 17471 states and 24138 transitions. [2022-11-03 02:42:40,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:42:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 17471 states and 24138 transitions. [2022-11-03 02:42:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-11-03 02:42:40,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:40,504 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:40,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:40,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:40,720 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:40,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1698956399, now seen corresponding path program 1 times [2022-11-03 02:42:40,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:40,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575640121] [2022-11-03 02:42:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:40,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-03 02:42:40,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:40,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575640121] [2022-11-03 02:42:40,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575640121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:40,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:40,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:42:40,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546811041] [2022-11-03 02:42:40,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:40,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:41,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:41,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:42:41,002 INFO L87 Difference]: Start difference. First operand 17471 states and 24138 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:42:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:44,006 INFO L93 Difference]: Finished difference Result 27047 states and 37361 transitions. [2022-11-03 02:42:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:44,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 221 [2022-11-03 02:42:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:44,058 INFO L225 Difference]: With dead ends: 27047 [2022-11-03 02:42:44,058 INFO L226 Difference]: Without dead ends: 9593 [2022-11-03 02:42:44,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:42:44,117 INFO L413 NwaCegarLoop]: 810 mSDtfsCounter, 5 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:44,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1617 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:42:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9593 states. [2022-11-03 02:42:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9593 to 9586. [2022-11-03 02:42:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9586 states, 6143 states have (on average 1.3237831678333063) internal successors, (8132), 6263 states have internal predecessors, (8132), 2545 states have call successors, (2545), 892 states have call predecessors, (2545), 897 states have return successors, (2559), 2514 states have call predecessors, (2559), 2544 states have call successors, (2559) [2022-11-03 02:42:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9586 states to 9586 states and 13236 transitions. [2022-11-03 02:42:45,029 INFO L78 Accepts]: Start accepts. Automaton has 9586 states and 13236 transitions. Word has length 221 [2022-11-03 02:42:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:45,030 INFO L495 AbstractCegarLoop]: Abstraction has 9586 states and 13236 transitions. [2022-11-03 02:42:45,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:42:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 9586 states and 13236 transitions. [2022-11-03 02:42:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-11-03 02:42:45,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:45,061 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:45,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:42:45,061 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:45,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:45,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1970831685, now seen corresponding path program 1 times [2022-11-03 02:42:45,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:45,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919032471] [2022-11-03 02:42:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:45,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-11-03 02:42:45,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:45,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919032471] [2022-11-03 02:42:45,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919032471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:45,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033511430] [2022-11-03 02:42:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:45,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:45,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:45,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:45,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:42:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 2953 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:42:47,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-03 02:42:47,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:47,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033511430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:47,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:47,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:42:47,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434826225] [2022-11-03 02:42:47,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:47,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:47,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:47,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:47,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:42:47,614 INFO L87 Difference]: Start difference. First operand 9586 states and 13236 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2022-11-03 02:42:50,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:50,890 INFO L93 Difference]: Finished difference Result 17635 states and 24330 transitions. [2022-11-03 02:42:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:50,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 227 [2022-11-03 02:42:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:50,943 INFO L225 Difference]: With dead ends: 17635 [2022-11-03 02:42:50,943 INFO L226 Difference]: Without dead ends: 7685 [2022-11-03 02:42:50,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:42:50,982 INFO L413 NwaCegarLoop]: 1262 mSDtfsCounter, 767 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:50,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 1756 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 02:42:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7685 states. [2022-11-03 02:42:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7685 to 7301. [2022-11-03 02:42:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7301 states, 4675 states have (on average 1.3159358288770053) internal successors, (6152), 4771 states have internal predecessors, (6152), 1933 states have call successors, (1933), 687 states have call predecessors, (1933), 692 states have return successors, (1947), 1908 states have call predecessors, (1947), 1932 states have call successors, (1947) [2022-11-03 02:42:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7301 states to 7301 states and 10032 transitions. [2022-11-03 02:42:51,618 INFO L78 Accepts]: Start accepts. Automaton has 7301 states and 10032 transitions. Word has length 227 [2022-11-03 02:42:51,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:51,619 INFO L495 AbstractCegarLoop]: Abstraction has 7301 states and 10032 transitions. [2022-11-03 02:42:51,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2022-11-03 02:42:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand 7301 states and 10032 transitions. [2022-11-03 02:42:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-03 02:42:51,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:51,639 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:51,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:51,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:51,860 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:51,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:51,860 INFO L85 PathProgramCache]: Analyzing trace with hash 65249319, now seen corresponding path program 1 times [2022-11-03 02:42:51,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:51,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841679498] [2022-11-03 02:42:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:51,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-11-03 02:42:52,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841679498] [2022-11-03 02:42:52,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841679498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:52,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:42:52,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:42:52,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680340975] [2022-11-03 02:42:52,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:52,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:42:52,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:52,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:42:52,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:42:52,162 INFO L87 Difference]: Start difference. First operand 7301 states and 10032 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:42:54,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:54,481 INFO L93 Difference]: Finished difference Result 16458 states and 22461 transitions. [2022-11-03 02:42:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:42:54,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 235 [2022-11-03 02:42:54,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:54,527 INFO L225 Difference]: With dead ends: 16458 [2022-11-03 02:42:54,528 INFO L226 Difference]: Without dead ends: 9121 [2022-11-03 02:42:54,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:42:54,554 INFO L413 NwaCegarLoop]: 901 mSDtfsCounter, 523 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:54,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1608 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:42:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9121 states. [2022-11-03 02:42:55,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9121 to 9016. [2022-11-03 02:42:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9016 states, 5854 states have (on average 1.3168773488213188) internal successors, (7709), 5990 states have internal predecessors, (7709), 2249 states have call successors, (2249), 901 states have call predecessors, (2249), 912 states have return successors, (2290), 2200 states have call predecessors, (2290), 2248 states have call successors, (2290) [2022-11-03 02:42:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9016 states to 9016 states and 12248 transitions. [2022-11-03 02:42:55,180 INFO L78 Accepts]: Start accepts. Automaton has 9016 states and 12248 transitions. Word has length 235 [2022-11-03 02:42:55,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:55,181 INFO L495 AbstractCegarLoop]: Abstraction has 9016 states and 12248 transitions. [2022-11-03 02:42:55,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:42:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 9016 states and 12248 transitions. [2022-11-03 02:42:55,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-03 02:42:55,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:55,196 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:42:55,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:42:55,197 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:55,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2029796823, now seen corresponding path program 1 times [2022-11-03 02:42:55,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:42:55,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337948607] [2022-11-03 02:42:55,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:55,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:42:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-11-03 02:42:56,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:42:56,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337948607] [2022-11-03 02:42:56,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337948607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:56,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671959014] [2022-11-03 02:42:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:56,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:56,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:56,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:56,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:42:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:57,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 3014 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:42:57,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-03 02:42:57,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:57,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671959014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:57,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:57,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2022-11-03 02:42:57,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696159552] [2022-11-03 02:42:57,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:57,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:42:57,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:42:57,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:42:57,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:42:57,295 INFO L87 Difference]: Start difference. First operand 9016 states and 12248 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-03 02:43:00,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:00,969 INFO L93 Difference]: Finished difference Result 18014 states and 24542 transitions. [2022-11-03 02:43:00,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:00,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) Word has length 239 [2022-11-03 02:43:00,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:01,055 INFO L225 Difference]: With dead ends: 18014 [2022-11-03 02:43:01,055 INFO L226 Difference]: Without dead ends: 9092 [2022-11-03 02:43:01,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:01,086 INFO L413 NwaCegarLoop]: 806 mSDtfsCounter, 2 mSDsluCounter, 2745 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3209 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:01,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3209 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:43:01,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9092 states. [2022-11-03 02:43:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9092 to 9064. [2022-11-03 02:43:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9064 states, 5890 states have (on average 1.3149405772495755) internal successors, (7745), 6026 states have internal predecessors, (7745), 2249 states have call successors, (2249), 901 states have call predecessors, (2249), 924 states have return successors, (2309), 2212 states have call predecessors, (2309), 2248 states have call successors, (2309) [2022-11-03 02:43:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9064 states to 9064 states and 12303 transitions. [2022-11-03 02:43:02,046 INFO L78 Accepts]: Start accepts. Automaton has 9064 states and 12303 transitions. Word has length 239 [2022-11-03 02:43:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:02,047 INFO L495 AbstractCegarLoop]: Abstraction has 9064 states and 12303 transitions. [2022-11-03 02:43:02,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-03 02:43:02,047 INFO L276 IsEmpty]: Start isEmpty. Operand 9064 states and 12303 transitions. [2022-11-03 02:43:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-03 02:43:02,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:02,062 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:02,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:02,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:43:02,276 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:02,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2139151997, now seen corresponding path program 1 times [2022-11-03 02:43:02,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:02,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214593622] [2022-11-03 02:43:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:02,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-11-03 02:43:03,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214593622] [2022-11-03 02:43:03,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214593622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470918348] [2022-11-03 02:43:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:03,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:03,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:03,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:03,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:43:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:05,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 3055 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:43:05,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-03 02:43:05,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:05,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470918348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:05,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:05,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2022-11-03 02:43:05,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489501093] [2022-11-03 02:43:05,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:05,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:05,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:05,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:05,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:05,109 INFO L87 Difference]: Start difference. First operand 9064 states and 12303 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 02:43:09,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:09,210 INFO L93 Difference]: Finished difference Result 22143 states and 31071 transitions. [2022-11-03 02:43:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:09,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 243 [2022-11-03 02:43:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:09,279 INFO L225 Difference]: With dead ends: 22143 [2022-11-03 02:43:09,279 INFO L226 Difference]: Without dead ends: 13173 [2022-11-03 02:43:09,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:09,312 INFO L413 NwaCegarLoop]: 1093 mSDtfsCounter, 293 mSDsluCounter, 3395 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 4122 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:09,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 4122 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:43:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13173 states. [2022-11-03 02:43:10,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13173 to 9112. [2022-11-03 02:43:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9112 states, 5926 states have (on average 1.3130273371582855) internal successors, (7781), 6062 states have internal predecessors, (7781), 2249 states have call successors, (2249), 901 states have call predecessors, (2249), 936 states have return successors, (2345), 2224 states have call predecessors, (2345), 2248 states have call successors, (2345) [2022-11-03 02:43:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9112 states to 9112 states and 12375 transitions. [2022-11-03 02:43:10,085 INFO L78 Accepts]: Start accepts. Automaton has 9112 states and 12375 transitions. Word has length 243 [2022-11-03 02:43:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:10,085 INFO L495 AbstractCegarLoop]: Abstraction has 9112 states and 12375 transitions. [2022-11-03 02:43:10,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 02:43:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 9112 states and 12375 transitions. [2022-11-03 02:43:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-03 02:43:10,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:10,099 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:10,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:10,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:43:10,316 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:10,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1759173666, now seen corresponding path program 1 times [2022-11-03 02:43:10,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:10,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109631863] [2022-11-03 02:43:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:10,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-11-03 02:43:12,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:12,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109631863] [2022-11-03 02:43:12,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109631863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:12,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350831064] [2022-11-03 02:43:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:12,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:12,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:12,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:12,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:43:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:14,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:43:14,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-03 02:43:14,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:14,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350831064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:14,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:14,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-03 02:43:14,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636165948] [2022-11-03 02:43:14,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:14,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:14,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:14,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:14,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:43:14,472 INFO L87 Difference]: Start difference. First operand 9112 states and 12375 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) [2022-11-03 02:43:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:17,913 INFO L93 Difference]: Finished difference Result 18642 states and 25499 transitions. [2022-11-03 02:43:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:17,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) Word has length 247 [2022-11-03 02:43:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:17,963 INFO L225 Difference]: With dead ends: 18642 [2022-11-03 02:43:17,963 INFO L226 Difference]: Without dead ends: 9608 [2022-11-03 02:43:17,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:17,997 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 330 mSDsluCounter, 3151 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 3823 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:17,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 3823 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 02:43:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2022-11-03 02:43:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 9124. [2022-11-03 02:43:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9124 states, 5946 states have (on average 1.3119744365960309) internal successors, (7801), 6086 states have internal predecessors, (7801), 2237 states have call successors, (2237), 901 states have call predecessors, (2237), 940 states have return successors, (2337), 2212 states have call predecessors, (2337), 2236 states have call successors, (2337) [2022-11-03 02:43:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9124 states to 9124 states and 12375 transitions. [2022-11-03 02:43:19,085 INFO L78 Accepts]: Start accepts. Automaton has 9124 states and 12375 transitions. Word has length 247 [2022-11-03 02:43:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:19,086 INFO L495 AbstractCegarLoop]: Abstraction has 9124 states and 12375 transitions. [2022-11-03 02:43:19,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 2 states have call predecessors, (35), 3 states have call successors, (35) [2022-11-03 02:43:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 9124 states and 12375 transitions. [2022-11-03 02:43:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 02:43:19,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:19,104 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:19,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-03 02:43:19,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:19,320 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:19,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1098327381, now seen corresponding path program 1 times [2022-11-03 02:43:19,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:19,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035377565] [2022-11-03 02:43:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:19,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-11-03 02:43:21,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:21,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035377565] [2022-11-03 02:43:21,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035377565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861896756] [2022-11-03 02:43:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:21,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:21,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:21,934 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:21,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:43:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:23,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:43:23,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-03 02:43:23,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-11-03 02:43:23,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861896756] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:23,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:43:23,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 11 [2022-11-03 02:43:23,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441781256] [2022-11-03 02:43:23,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:23,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:23,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:23,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:23,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:23,545 INFO L87 Difference]: Start difference. First operand 9124 states and 12375 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-03 02:43:27,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:43:27,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:27,783 INFO L93 Difference]: Finished difference Result 18182 states and 24737 transitions. [2022-11-03 02:43:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:43:27,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 248 [2022-11-03 02:43:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:27,826 INFO L225 Difference]: With dead ends: 18182 [2022-11-03 02:43:27,826 INFO L226 Difference]: Without dead ends: 9152 [2022-11-03 02:43:27,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:27,864 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 3 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2397 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:27,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2397 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 02:43:27,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9152 states. [2022-11-03 02:43:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9152 to 9144. [2022-11-03 02:43:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9144 states, 5966 states have (on average 1.3109285953737848) internal successors, (7821), 6106 states have internal predecessors, (7821), 2237 states have call successors, (2237), 901 states have call predecessors, (2237), 940 states have return successors, (2337), 2212 states have call predecessors, (2337), 2236 states have call successors, (2337) [2022-11-03 02:43:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9144 states to 9144 states and 12395 transitions. [2022-11-03 02:43:28,807 INFO L78 Accepts]: Start accepts. Automaton has 9144 states and 12395 transitions. Word has length 248 [2022-11-03 02:43:28,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:28,808 INFO L495 AbstractCegarLoop]: Abstraction has 9144 states and 12395 transitions. [2022-11-03 02:43:28,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-03 02:43:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 9144 states and 12395 transitions. [2022-11-03 02:43:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-03 02:43:28,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:28,821 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:28,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:29,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:43:29,032 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:29,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1775876348, now seen corresponding path program 1 times [2022-11-03 02:43:29,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:29,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751219008] [2022-11-03 02:43:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:29,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-03 02:43:31,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:31,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751219008] [2022-11-03 02:43:31,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751219008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:31,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313841254] [2022-11-03 02:43:31,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:31,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:31,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:31,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:31,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:43:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:32,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 3207 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:43:32,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-03 02:43:32,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:32,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313841254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:32,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:32,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2022-11-03 02:43:32,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266493831] [2022-11-03 02:43:32,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:32,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:43:32,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:33,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:43:33,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:33,000 INFO L87 Difference]: Start difference. First operand 9144 states and 12395 transitions. Second operand has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (36), 4 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-03 02:43:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:37,015 INFO L93 Difference]: Finished difference Result 18274 states and 24797 transitions. [2022-11-03 02:43:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:43:37,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (36), 4 states have call predecessors, (36), 2 states have call successors, (36) Word has length 249 [2022-11-03 02:43:37,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:37,055 INFO L225 Difference]: With dead ends: 18274 [2022-11-03 02:43:37,056 INFO L226 Difference]: Without dead ends: 9224 [2022-11-03 02:43:37,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:37,091 INFO L413 NwaCegarLoop]: 806 mSDtfsCounter, 0 mSDsluCounter, 4579 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4822 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:37,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4822 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 02:43:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9224 states. [2022-11-03 02:43:37,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9224 to 9188. [2022-11-03 02:43:37,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9188 states, 5998 states have (on average 1.3092697565855285) internal successors, (7853), 6128 states have internal predecessors, (7853), 2237 states have call successors, (2237), 901 states have call predecessors, (2237), 952 states have return successors, (2377), 2234 states have call predecessors, (2377), 2236 states have call successors, (2377) [2022-11-03 02:43:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9188 states to 9188 states and 12467 transitions. [2022-11-03 02:43:37,736 INFO L78 Accepts]: Start accepts. Automaton has 9188 states and 12467 transitions. Word has length 249 [2022-11-03 02:43:37,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:37,737 INFO L495 AbstractCegarLoop]: Abstraction has 9188 states and 12467 transitions. [2022-11-03 02:43:37,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (36), 4 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-03 02:43:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand 9188 states and 12467 transitions. [2022-11-03 02:43:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-11-03 02:43:37,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:37,748 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:37,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:37,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:43:37,964 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1569389148, now seen corresponding path program 2 times [2022-11-03 02:43:37,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:37,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821597275] [2022-11-03 02:43:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:37,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-11-03 02:43:40,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:40,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821597275] [2022-11-03 02:43:40,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821597275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:40,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370818119] [2022-11-03 02:43:40,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:43:40,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:40,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:40,480 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:40,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:43:41,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:43:41,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:41,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:43:41,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-03 02:43:42,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:42,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370818119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:42,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:43:42,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2022-11-03 02:43:42,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189508697] [2022-11-03 02:43:42,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:42,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:43:42,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:42,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:43:42,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:43:42,052 INFO L87 Difference]: Start difference. First operand 9188 states and 12467 transitions. Second operand has 10 states, 9 states have (on average 14.222222222222221) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (37), 5 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-03 02:43:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:48,832 INFO L93 Difference]: Finished difference Result 18460 states and 25140 transitions. [2022-11-03 02:43:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:43:48,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 14.222222222222221) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (37), 5 states have call predecessors, (37), 2 states have call successors, (37) Word has length 257 [2022-11-03 02:43:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:48,874 INFO L225 Difference]: With dead ends: 18460 [2022-11-03 02:43:48,875 INFO L226 Difference]: Without dead ends: 9366 [2022-11-03 02:43:48,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:43:48,904 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 13 mSDsluCounter, 7430 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 7338 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:48,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 7338 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-03 02:43:48,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9366 states. [2022-11-03 02:43:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9366 to 9248. [2022-11-03 02:43:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9248 states, 6046 states have (on average 1.3048296394310288) internal successors, (7889), 6170 states have internal predecessors, (7889), 2237 states have call successors, (2237), 901 states have call predecessors, (2237), 964 states have return successors, (2395), 2252 states have call predecessors, (2395), 2236 states have call successors, (2395) [2022-11-03 02:43:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9248 states to 9248 states and 12521 transitions. [2022-11-03 02:43:49,595 INFO L78 Accepts]: Start accepts. Automaton has 9248 states and 12521 transitions. Word has length 257 [2022-11-03 02:43:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:49,596 INFO L495 AbstractCegarLoop]: Abstraction has 9248 states and 12521 transitions. [2022-11-03 02:43:49,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 14.222222222222221) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (37), 5 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-03 02:43:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 9248 states and 12521 transitions. [2022-11-03 02:43:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-03 02:43:49,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:49,605 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:49,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:49,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:43:49,806 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:49,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:49,807 INFO L85 PathProgramCache]: Analyzing trace with hash 969831436, now seen corresponding path program 1 times [2022-11-03 02:43:49,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:49,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182099753] [2022-11-03 02:43:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:49,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-03 02:43:50,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:43:50,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182099753] [2022-11-03 02:43:50,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182099753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:43:50,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452922854] [2022-11-03 02:43:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:50,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:50,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:50,272 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:50,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:43:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:51,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 3305 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:43:51,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-03 02:43:51,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-03 02:43:51,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452922854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:51,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500622558] [2022-11-03 02:43:51,890 INFO L159 IcfgInterpreter]: Started Sifa with 160 locations of interest [2022-11-03 02:43:51,890 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:43:51,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:43:51,902 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:43:51,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:43:53,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:53,488 INFO L244 Elim1Store]: Index analysis took 103 ms [2022-11-03 02:43:57,480 INFO L356 Elim1Store]: treesize reduction 1008, result has 33.4 percent of original size [2022-11-03 02:43:57,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 59 select indices, 59 select index equivalence classes, 1655 disjoint index pairs (out of 1711 index pairs), introduced 59 new quantified variables, introduced 112 case distinctions, treesize of input 302 treesize of output 697 [2022-11-03 02:43:57,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1244 treesize of output 982 [2022-11-03 02:43:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:58,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1654 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 462 [2022-11-03 02:43:59,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1244 treesize of output 982 [2022-11-03 02:44:02,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:44:03,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:44:03,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:44:05,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:05,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 58 select indices, 58 select index equivalence classes, 1654 disjoint index pairs (out of 1653 index pairs), introduced 58 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 175 [2022-11-03 02:44:05,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:05,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 59 select indices, 59 select index equivalence classes, 1711 disjoint index pairs (out of 1711 index pairs), introduced 59 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 178 [2022-11-03 02:44:06,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:06,583 INFO L244 Elim1Store]: Index analysis took 338 ms [2022-11-03 02:44:06,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 112 select indices, 112 select index equivalence classes, 4185 disjoint index pairs (out of 6216 index pairs), introduced 112 new quantified variables, introduced 0 case distinctions, treesize of input 1001 treesize of output 337 [2022-11-03 02:44:11,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:11,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:11,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,212 INFO L244 Elim1Store]: Index analysis took 220 ms [2022-11-03 02:44:12,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 112 select indices, 112 select index equivalence classes, 4185 disjoint index pairs (out of 6216 index pairs), introduced 112 new quantified variables, introduced 0 case distinctions, treesize of input 1001 treesize of output 337 [2022-11-03 02:44:12,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:12,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 58 select indices, 58 select index equivalence classes, 1654 disjoint index pairs (out of 1653 index pairs), introduced 58 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 175 [2022-11-03 02:44:13,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:44:13,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 59 select indices, 59 select index equivalence classes, 1711 disjoint index pairs (out of 1711 index pairs), introduced 59 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 178 [2022-11-03 02:44:16,026 INFO L390 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 [2022-11-03 02:44:16,058 INFO L390 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 [2022-11-03 02:44:16,094 INFO L390 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 [2022-11-03 02:44:17,310 INFO L390 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 [2022-11-03 02:44:17,341 INFO L390 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 [2022-11-03 02:44:17,374 INFO L390 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 [2022-11-03 02:44:19,688 INFO L390 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 [2022-11-03 02:44:19,724 INFO L390 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 [2022-11-03 02:44:19,760 INFO L390 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 [2022-11-03 02:44:21,357 INFO L390 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 [2022-11-03 02:44:21,392 INFO L390 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 [2022-11-03 02:44:21,441 INFO L390 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 [2022-11-03 02:44:29,295 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 115 for LOIs [2022-11-03 02:44:29,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:44:29,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:44:29,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:44:30,034 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 136 for LOIs [2022-11-03 02:44:30,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:45:23,590 WARN L234 SmtUtils]: Spent 53.24s on a formula simplification. DAG size of input: 1725 DAG size of output: 1611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:50,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1500622558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:50,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:45:50,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [4, 4, 4] total 27 [2022-11-03 02:45:50,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501485639] [2022-11-03 02:45:50,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:50,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:45:50,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:50,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:45:50,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:45:50,768 INFO L87 Difference]: Start difference. First operand 9248 states and 12521 transitions. Second operand has 22 states, 14 states have (on average 8.142857142857142) internal successors, (114), 12 states have internal predecessors, (114), 8 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2022-11-03 02:46:29,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:46:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:31,546 INFO L93 Difference]: Finished difference Result 18477 states and 25022 transitions. [2022-11-03 02:46:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:46:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 14 states have (on average 8.142857142857142) internal successors, (114), 12 states have internal predecessors, (114), 8 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 259 [2022-11-03 02:46:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:31,579 INFO L225 Difference]: With dead ends: 18477 [2022-11-03 02:46:31,580 INFO L226 Difference]: Without dead ends: 9251 [2022-11-03 02:46:31,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 754 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 92.5s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:46:31,701 INFO L413 NwaCegarLoop]: 790 mSDtfsCounter, 14 mSDsluCounter, 10904 mSDsCounter, 0 mSdLazyCounter, 3498 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10724 SdHoareTripleChecker+Invalid, 4073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 555 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:31,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 10724 Invalid, 4073 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [20 Valid, 3498 Invalid, 0 Unknown, 555 Unchecked, 28.1s Time] [2022-11-03 02:46:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9251 states. [2022-11-03 02:46:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9251 to 9249. [2022-11-03 02:46:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9249 states, 6047 states have (on average 1.3047792293699354) internal successors, (7890), 6171 states have internal predecessors, (7890), 2237 states have call successors, (2237), 901 states have call predecessors, (2237), 964 states have return successors, (2395), 2252 states have call predecessors, (2395), 2236 states have call successors, (2395) [2022-11-03 02:46:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9249 states to 9249 states and 12522 transitions. [2022-11-03 02:46:32,240 INFO L78 Accepts]: Start accepts. Automaton has 9249 states and 12522 transitions. Word has length 259 [2022-11-03 02:46:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:32,240 INFO L495 AbstractCegarLoop]: Abstraction has 9249 states and 12522 transitions. [2022-11-03 02:46:32,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 14 states have (on average 8.142857142857142) internal successors, (114), 12 states have internal predecessors, (114), 8 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2022-11-03 02:46:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 9249 states and 12522 transitions. [2022-11-03 02:46:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-11-03 02:46:32,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:32,252 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:32,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:32,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:32,480 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:32,480 INFO L85 PathProgramCache]: Analyzing trace with hash -157836008, now seen corresponding path program 1 times [2022-11-03 02:46:32,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:32,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14329272] [2022-11-03 02:46:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:32,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-11-03 02:46:32,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:32,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14329272] [2022-11-03 02:46:32,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14329272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:32,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645829148] [2022-11-03 02:46:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:32,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:32,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:32,844 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:32,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:46:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:34,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 3295 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:46:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-11-03 02:46:34,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-11-03 02:46:34,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645829148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:34,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [844855465] [2022-11-03 02:46:34,447 INFO L159 IcfgInterpreter]: Started Sifa with 160 locations of interest [2022-11-03 02:46:34,448 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:46:34,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:46:34,449 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:46:34,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:46:35,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1244 treesize of output 982 [2022-11-03 02:46:35,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:39,796 INFO L356 Elim1Store]: treesize reduction 1008, result has 33.4 percent of original size [2022-11-03 02:46:39,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 59 select indices, 59 select index equivalence classes, 1655 disjoint index pairs (out of 1711 index pairs), introduced 59 new quantified variables, introduced 112 case distinctions, treesize of input 302 treesize of output 697 [2022-11-03 02:46:40,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:40,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 57 select indices, 57 select index equivalence classes, 1654 disjoint index pairs (out of 1596 index pairs), introduced 57 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 462 [2022-11-03 02:46:40,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1244 treesize of output 982 [2022-11-03 02:46:44,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:46:44,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:46:44,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:46:46,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,429 INFO L244 Elim1Store]: Index analysis took 244 ms [2022-11-03 02:46:46,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 112 select indices, 112 select index equivalence classes, 4185 disjoint index pairs (out of 6216 index pairs), introduced 112 new quantified variables, introduced 0 case distinctions, treesize of input 1001 treesize of output 337 [2022-11-03 02:46:46,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:46,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 59 select indices, 59 select index equivalence classes, 1711 disjoint index pairs (out of 1711 index pairs), introduced 59 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 178 [2022-11-03 02:46:47,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:47,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 58 select indices, 58 select index equivalence classes, 1654 disjoint index pairs (out of 1653 index pairs), introduced 58 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 175 [2022-11-03 02:46:52,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:52,650 INFO L244 Elim1Store]: Index analysis took 220 ms [2022-11-03 02:46:52,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 112 select indices, 112 select index equivalence classes, 4185 disjoint index pairs (out of 6216 index pairs), introduced 112 new quantified variables, introduced 0 case distinctions, treesize of input 1001 treesize of output 337 [2022-11-03 02:46:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:53,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 59 select indices, 59 select index equivalence classes, 1711 disjoint index pairs (out of 1711 index pairs), introduced 59 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 178 [2022-11-03 02:46:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:53,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 58 select indices, 58 select index equivalence classes, 1654 disjoint index pairs (out of 1653 index pairs), introduced 58 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 175 [2022-11-03 02:47:15,239 INFO L390 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 [2022-11-03 02:47:15,426 INFO L390 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 [2022-11-03 02:47:15,647 INFO L390 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 [2022-11-03 02:47:34,935 INFO L390 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 [2022-11-03 02:47:35,023 INFO L390 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 [2022-11-03 02:47:35,236 INFO L390 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 [2022-11-03 02:47:38,701 INFO L390 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 [2022-11-03 02:47:38,744 INFO L390 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 [2022-11-03 02:47:38,774 INFO L390 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 [2022-11-03 02:47:40,101 INFO L390 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 [2022-11-03 02:47:40,136 INFO L390 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 [2022-11-03 02:47:40,170 INFO L390 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 [2022-11-03 02:47:41,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:47:41,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:47:41,666 INFO L356 Elim1Store]: treesize reduction 16, result has 52.9 percent of original size [2022-11-03 02:47:41,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 406 treesize of output 418 [2022-11-03 02:47:42,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:42,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2022-11-03 02:47:42,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 10 [2022-11-03 02:47:43,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:47:43,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:47:43,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:48:04,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:04,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:04,505 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:48:04,511 INFO L158 Benchmark]: Toolchain (without parser) took 395139.98ms. Allocated memory was 123.7MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 78.2MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 1.7GB. Max. memory is 16.1GB. [2022-11-03 02:48:04,512 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 123.7MB. Free memory is still 104.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:48:04,512 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2884.40ms. Allocated memory was 123.7MB in the beginning and 165.7MB in the end (delta: 41.9MB). Free memory was 78.0MB in the beginning and 112.0MB in the end (delta: -34.0MB). Peak memory consumption was 57.0MB. Max. memory is 16.1GB. [2022-11-03 02:48:04,513 INFO L158 Benchmark]: Boogie Procedure Inliner took 240.92ms. Allocated memory is still 165.7MB. Free memory was 112.0MB in the beginning and 97.1MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:48:04,513 INFO L158 Benchmark]: Boogie Preprocessor took 180.25ms. Allocated memory is still 165.7MB. Free memory was 97.1MB in the beginning and 80.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 02:48:04,514 INFO L158 Benchmark]: RCFGBuilder took 5123.45ms. Allocated memory was 165.7MB in the beginning and 278.9MB in the end (delta: 113.2MB). Free memory was 80.3MB in the beginning and 154.2MB in the end (delta: -73.9MB). Peak memory consumption was 101.2MB. Max. memory is 16.1GB. [2022-11-03 02:48:04,514 INFO L158 Benchmark]: TraceAbstraction took 386695.04ms. Allocated memory was 278.9MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 154.2MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 1.7GB. Max. memory is 16.1GB. [2022-11-03 02:48:04,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 123.7MB. Free memory is still 104.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2884.40ms. Allocated memory was 123.7MB in the beginning and 165.7MB in the end (delta: 41.9MB). Free memory was 78.0MB in the beginning and 112.0MB in the end (delta: -34.0MB). Peak memory consumption was 57.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 240.92ms. Allocated memory is still 165.7MB. Free memory was 112.0MB in the beginning and 97.1MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 180.25ms. Allocated memory is still 165.7MB. Free memory was 97.1MB in the beginning and 80.3MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * RCFGBuilder took 5123.45ms. Allocated memory was 165.7MB in the beginning and 278.9MB in the end (delta: 113.2MB). Free memory was 80.3MB in the beginning and 154.2MB in the end (delta: -73.9MB). Peak memory consumption was 101.2MB. Max. memory is 16.1GB. * TraceAbstraction took 386695.04ms. Allocated memory was 278.9MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 154.2MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 1.7GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:48:04,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:48:07,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:48:07,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:48:07,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:48:07,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:48:07,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:48:07,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:48:07,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:48:07,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:48:07,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:48:07,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:48:07,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:48:07,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:48:07,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:48:07,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:48:07,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:48:07,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:48:07,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:48:07,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:48:07,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:48:07,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:48:07,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:48:07,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:48:07,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:48:07,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:48:07,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:48:07,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:48:07,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:48:07,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:48:07,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:48:07,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:48:07,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:48:07,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:48:07,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:48:07,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:48:07,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:48:07,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:48:07,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:48:07,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:48:07,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:48:07,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:48:07,583 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:48:07,655 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:48:07,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:48:07,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:48:07,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:48:07,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:48:07,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:48:07,659 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:48:07,659 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:48:07,659 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:48:07,660 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:48:07,663 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:48:07,663 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:48:07,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:48:07,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:48:07,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:48:07,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:48:07,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:48:07,667 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:48:07,667 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:48:07,667 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:48:07,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:48:07,668 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:48:07,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:48:07,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:48:07,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:48:07,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:48:07,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:48:07,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:48:07,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:48:07,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:48:07,670 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:48:07,670 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:07,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:48:07,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:48:07,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:48:07,672 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d [2022-11-03 02:48:08,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:48:08,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:48:08,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:48:08,202 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:48:08,203 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:48:08,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2022-11-03 02:48:08,305 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/data/f965666ba/9608eebb0f504bf7ad64ba472a7bd6d0/FLAG58dc40eb0 [2022-11-03 02:48:09,386 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:48:09,387 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2022-11-03 02:48:09,430 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/data/f965666ba/9608eebb0f504bf7ad64ba472a7bd6d0/FLAG58dc40eb0 [2022-11-03 02:48:09,801 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/data/f965666ba/9608eebb0f504bf7ad64ba472a7bd6d0 [2022-11-03 02:48:09,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:48:09,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:48:09,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:48:09,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:48:09,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:48:09,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:48:09" (1/1) ... [2022-11-03 02:48:09,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7889f9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:09, skipping insertion in model container [2022-11-03 02:48:09,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:48:09" (1/1) ... [2022-11-03 02:48:09,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:48:09,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:48:11,017 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_daa2418b-00bf-4a58-afb7-dfca69470c76/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2022-11-03 02:48:11,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:48:12,059 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:48:12,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:48:12,318 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_daa2418b-00bf-4a58-afb7-dfca69470c76/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2022-11-03 02:48:12,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:48:12,591 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:48:12,809 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_daa2418b-00bf-4a58-afb7-dfca69470c76/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2022-11-03 02:48:12,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:48:13,170 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:48:13,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13 WrapperNode [2022-11-03 02:48:13,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:48:13,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:48:13,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:48:13,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:48:13,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (1/1) ... [2022-11-03 02:48:13,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (1/1) ... [2022-11-03 02:48:13,520 INFO L138 Inliner]: procedures = 212, calls = 1031, calls flagged for inlining = 87, calls inlined = 80, statements flattened = 2343 [2022-11-03 02:48:13,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:48:13,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:48:13,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:48:13,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:48:13,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (1/1) ... [2022-11-03 02:48:13,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (1/1) ... [2022-11-03 02:48:13,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (1/1) ... [2022-11-03 02:48:13,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (1/1) ... [2022-11-03 02:48:13,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (1/1) ... [2022-11-03 02:48:13,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (1/1) ... [2022-11-03 02:48:13,795 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (1/1) ... [2022-11-03 02:48:13,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (1/1) ... [2022-11-03 02:48:13,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:48:13,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:48:13,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:48:13,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:48:13,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (1/1) ... [2022-11-03 02:48:13,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:48:13,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:13,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:48:13,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:48:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 02:48:13,972 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-03 02:48:13,972 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-03 02:48:13,972 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 02:48:13,972 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 02:48:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-03 02:48:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:48:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:48:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-11-03 02:48:13,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:48:13,974 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:48:13,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:48:13,974 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-03 02:48:13,975 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-03 02:48:13,975 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-03 02:48:13,975 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-03 02:48:13,975 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-11-03 02:48:13,976 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-11-03 02:48:13,976 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:48:13,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:48:13,976 INFO L130 BoogieDeclarations]: Found specification of procedure pull_skb [2022-11-03 02:48:13,976 INFO L138 BoogieDeclarations]: Found implementation of procedure pull_skb [2022-11-03 02:48:13,977 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-03 02:48:13,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-03 02:48:13,977 INFO L130 BoogieDeclarations]: Found specification of procedure free_skb_pool [2022-11-03 02:48:13,977 INFO L138 BoogieDeclarations]: Found implementation of procedure free_skb_pool [2022-11-03 02:48:13,978 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-03 02:48:13,978 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-03 02:48:13,978 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:48:13,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:48:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2022-11-03 02:48:13,979 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2022-11-03 02:48:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2022-11-03 02:48:13,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2022-11-03 02:48:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2022-11-03 02:48:13,980 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2022-11-03 02:48:13,981 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 02:48:13,981 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 02:48:13,981 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:48:13,981 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:48:13,981 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-03 02:48:13,982 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-03 02:48:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2022-11-03 02:48:13,982 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2022-11-03 02:48:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:48:13,983 INFO L130 BoogieDeclarations]: Found specification of procedure fill_skb_pool [2022-11-03 02:48:13,984 INFO L138 BoogieDeclarations]: Found implementation of procedure fill_skb_pool [2022-11-03 02:48:13,984 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-03 02:48:13,986 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-03 02:48:13,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:48:13,986 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-03 02:48:13,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-03 02:48:13,988 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-03 02:48:13,988 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-03 02:48:13,988 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-03 02:48:13,989 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-03 02:48:13,989 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_set_mac_address [2022-11-03 02:48:13,989 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_set_mac_address [2022-11-03 02:48:13,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-03 02:48:13,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-03 02:48:13,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-11-03 02:48:13,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:48:13,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:48:13,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:48:13,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-11-03 02:48:13,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:48:13,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-03 02:48:13,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-11-03 02:48:13,993 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_set_multicast [2022-11-03 02:48:13,994 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_set_multicast [2022-11-03 02:48:13,994 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-03 02:48:13,994 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-03 02:48:13,994 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:48:13,995 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:48:13,995 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2022-11-03 02:48:13,996 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2022-11-03 02:48:13,996 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 02:48:13,996 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 02:48:13,996 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-03 02:48:13,996 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-03 02:48:13,997 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 02:48:13,998 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 02:48:13,998 INFO L130 BoogieDeclarations]: Found specification of procedure free_all_urbs [2022-11-03 02:48:13,999 INFO L138 BoogieDeclarations]: Found implementation of procedure free_all_urbs [2022-11-03 02:48:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure __printk_ratelimit [2022-11-03 02:48:13,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __printk_ratelimit [2022-11-03 02:48:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-03 02:48:14,001 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-03 02:48:14,001 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 02:48:14,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 02:48:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_tx_timeout [2022-11-03 02:48:14,003 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_tx_timeout [2022-11-03 02:48:14,003 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-03 02:48:14,003 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-03 02:48:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_ioctl [2022-11-03 02:48:14,004 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_ioctl [2022-11-03 02:48:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:48:14,004 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:48:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-03 02:48:14,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-03 02:48:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 02:48:14,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 02:48:14,006 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 02:48:14,006 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 02:48:14,006 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 02:48:14,007 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 02:48:14,007 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:48:14,007 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:48:14,008 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_reset [2022-11-03 02:48:14,009 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_reset [2022-11-03 02:48:14,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-11-03 02:48:14,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2022-11-03 02:48:14,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-03 02:48:14,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-11-03 02:48:14,014 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:48:14,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:48:14,016 INFO L130 BoogieDeclarations]: Found specification of procedure rtl8150_disconnect [2022-11-03 02:48:14,016 INFO L138 BoogieDeclarations]: Found implementation of procedure rtl8150_disconnect [2022-11-03 02:48:14,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:48:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-11-03 02:48:14,023 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-11-03 02:48:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:48:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:48:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2022-11-03 02:48:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2022-11-03 02:48:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-11-03 02:48:14,025 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2022-11-03 02:48:14,025 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2022-11-03 02:48:14,025 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-03 02:48:14,025 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-03 02:48:14,025 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-03 02:48:14,026 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-03 02:48:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure get_registers [2022-11-03 02:48:14,026 INFO L138 BoogieDeclarations]: Found implementation of procedure get_registers [2022-11-03 02:48:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 02:48:14,027 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 02:48:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-11-03 02:48:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure set_registers [2022-11-03 02:48:14,027 INFO L138 BoogieDeclarations]: Found implementation of procedure set_registers [2022-11-03 02:48:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:48:14,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:48:14,906 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:48:14,913 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:48:15,251 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:48:38,014 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:48:38,040 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:48:38,043 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:48:38,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:48:38 BoogieIcfgContainer [2022-11-03 02:48:38,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:48:38,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:48:38,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:48:38,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:48:38,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:48:09" (1/3) ... [2022-11-03 02:48:38,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1102ef09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:48:38, skipping insertion in model container [2022-11-03 02:48:38,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:48:13" (2/3) ... [2022-11-03 02:48:38,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1102ef09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:48:38, skipping insertion in model container [2022-11-03 02:48:38,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:48:38" (3/3) ... [2022-11-03 02:48:38,061 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2022-11-03 02:48:38,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:48:38,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:48:38,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:48:38,212 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@77b6875a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:48:38,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:48:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 849 states, 605 states have (on average 1.3305785123966942) internal successors, (805), 621 states have internal predecessors, (805), 188 states have call successors, (188), 55 states have call predecessors, (188), 54 states have return successors, (183), 181 states have call predecessors, (183), 183 states have call successors, (183) [2022-11-03 02:48:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:48:38,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:38,261 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:38,261 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:38,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:38,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1627128050, now seen corresponding path program 1 times [2022-11-03 02:48:38,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:38,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558729462] [2022-11-03 02:48:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:38,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:38,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:38,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:38,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:48:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:39,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:48:39,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:48:39,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:48:39,517 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558729462] [2022-11-03 02:48:39,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558729462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:39,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:48:39,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:48:39,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548085242] [2022-11-03 02:48:39,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:39,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:48:39,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:48:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:48:39,586 INFO L87 Difference]: Start difference. First operand has 849 states, 605 states have (on average 1.3305785123966942) internal successors, (805), 621 states have internal predecessors, (805), 188 states have call successors, (188), 55 states have call predecessors, (188), 54 states have return successors, (183), 181 states have call predecessors, (183), 183 states have call successors, (183) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:48:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:39,804 INFO L93 Difference]: Finished difference Result 1694 states and 2383 transitions. [2022-11-03 02:48:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:48:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2022-11-03 02:48:39,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:39,833 INFO L225 Difference]: With dead ends: 1694 [2022-11-03 02:48:39,833 INFO L226 Difference]: Without dead ends: 838 [2022-11-03 02:48:39,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:48:39,850 INFO L413 NwaCegarLoop]: 1165 mSDtfsCounter, 0 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:39,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2328 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:48:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-11-03 02:48:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 838. [2022-11-03 02:48:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 601 states have (on average 1.3094841930116472) internal successors, (787), 610 states have internal predecessors, (787), 183 states have call successors, (183), 54 states have call predecessors, (183), 53 states have return successors, (182), 180 states have call predecessors, (182), 182 states have call successors, (182) [2022-11-03 02:48:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1152 transitions. [2022-11-03 02:48:39,990 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1152 transitions. Word has length 56 [2022-11-03 02:48:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:39,993 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1152 transitions. [2022-11-03 02:48:39,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:48:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1152 transitions. [2022-11-03 02:48:39,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:48:39,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:39,998 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:40,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:40,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:40,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash -847093427, now seen corresponding path program 1 times [2022-11-03 02:48:40,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:40,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676618451] [2022-11-03 02:48:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:40,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:40,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:40,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:40,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:48:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:41,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:48:41,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:48:41,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:48:41,653 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:41,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676618451] [2022-11-03 02:48:41,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676618451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:41,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [966313836] [2022-11-03 02:48:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:41,654 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:41,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:41,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:41,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-03 02:48:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:48:42,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 02:48:42,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:48:42,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [966313836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:42,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:42,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-03 02:48:42,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929596316] [2022-11-03 02:48:42,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:42,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:48:42,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:42,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:48:42,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:48:42,781 INFO L87 Difference]: Start difference. First operand 838 states and 1152 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:48:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:43,132 INFO L93 Difference]: Finished difference Result 2457 states and 3383 transitions. [2022-11-03 02:48:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:48:43,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2022-11-03 02:48:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:43,145 INFO L225 Difference]: With dead ends: 2457 [2022-11-03 02:48:43,146 INFO L226 Difference]: Without dead ends: 1638 [2022-11-03 02:48:43,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:48:43,151 INFO L413 NwaCegarLoop]: 1332 mSDtfsCounter, 1104 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 2464 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:43,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1104 Valid, 2464 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:48:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2022-11-03 02:48:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1638. [2022-11-03 02:48:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1174 states have (on average 1.3126064735945486) internal successors, (1541), 1192 states have internal predecessors, (1541), 357 states have call successors, (357), 107 states have call predecessors, (357), 106 states have return successors, (356), 352 states have call predecessors, (356), 356 states have call successors, (356) [2022-11-03 02:48:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2254 transitions. [2022-11-03 02:48:43,330 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2254 transitions. Word has length 57 [2022-11-03 02:48:43,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:43,331 INFO L495 AbstractCegarLoop]: Abstraction has 1638 states and 2254 transitions. [2022-11-03 02:48:43,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 02:48:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2254 transitions. [2022-11-03 02:48:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:48:43,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:43,337 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:43,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:43,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:43,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:43,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1845898046, now seen corresponding path program 1 times [2022-11-03 02:48:43,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:43,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402259866] [2022-11-03 02:48:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:43,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:43,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:43,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:43,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:48:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:44,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:48:44,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:48:44,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:48:45,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:45,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402259866] [2022-11-03 02:48:45,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402259866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2074874114] [2022-11-03 02:48:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:45,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:45,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:45,049 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:45,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-03 02:48:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:46,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:48:46,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 02:48:46,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:48:46,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2074874114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:46,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:46,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 9 [2022-11-03 02:48:46,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503013920] [2022-11-03 02:48:46,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:46,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:48:46,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:46,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:48:46,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:48:46,368 INFO L87 Difference]: Start difference. First operand 1638 states and 2254 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:48:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:47,001 INFO L93 Difference]: Finished difference Result 4873 states and 6732 transitions. [2022-11-03 02:48:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:48:47,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-11-03 02:48:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:47,022 INFO L225 Difference]: With dead ends: 4873 [2022-11-03 02:48:47,022 INFO L226 Difference]: Without dead ends: 3248 [2022-11-03 02:48:47,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:48:47,037 INFO L413 NwaCegarLoop]: 1341 mSDtfsCounter, 1120 mSDsluCounter, 3807 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 5148 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:47,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1120 Valid, 5148 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:48:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2022-11-03 02:48:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 3240. [2022-11-03 02:48:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 2320 states have (on average 1.3129310344827587) internal successors, (3046), 2356 states have internal predecessors, (3046), 707 states have call successors, (707), 213 states have call predecessors, (707), 212 states have return successors, (726), 698 states have call predecessors, (726), 706 states have call successors, (726) [2022-11-03 02:48:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 4479 transitions. [2022-11-03 02:48:47,269 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 4479 transitions. Word has length 67 [2022-11-03 02:48:47,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:47,270 INFO L495 AbstractCegarLoop]: Abstraction has 3240 states and 4479 transitions. [2022-11-03 02:48:47,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:48:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 4479 transitions. [2022-11-03 02:48:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-03 02:48:47,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:47,289 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:47,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:47,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:47,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:47,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:47,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:47,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1484486064, now seen corresponding path program 1 times [2022-11-03 02:48:47,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:47,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027571726] [2022-11-03 02:48:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:47,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:47,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:47,722 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:47,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:48:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:49,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:48:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 02:48:49,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 02:48:49,575 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:49,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027571726] [2022-11-03 02:48:49,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027571726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:49,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1940691486] [2022-11-03 02:48:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:49,582 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:49,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:49,588 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:49,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 02:48:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:51,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:48:51,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:48:51,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:48:51,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1940691486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:51,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:51,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-03 02:48:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403077765] [2022-11-03 02:48:51,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:51,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:48:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:51,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:48:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:48:51,125 INFO L87 Difference]: Start difference. First operand 3240 states and 4479 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:48:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:51,730 INFO L93 Difference]: Finished difference Result 8377 states and 11533 transitions. [2022-11-03 02:48:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:48:51,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2022-11-03 02:48:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:51,767 INFO L225 Difference]: With dead ends: 8377 [2022-11-03 02:48:51,767 INFO L226 Difference]: Without dead ends: 5156 [2022-11-03 02:48:51,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:48:51,783 INFO L413 NwaCegarLoop]: 1361 mSDtfsCounter, 683 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:51,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 2463 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:48:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5156 states. [2022-11-03 02:48:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5156 to 5145. [2022-11-03 02:48:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5145 states, 3663 states have (on average 1.3123123123123124) internal successors, (4807), 3715 states have internal predecessors, (4807), 1120 states have call successors, (1120), 362 states have call predecessors, (1120), 361 states have return successors, (1139), 1107 states have call predecessors, (1139), 1119 states have call successors, (1139) [2022-11-03 02:48:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5145 states to 5145 states and 7066 transitions. [2022-11-03 02:48:52,216 INFO L78 Accepts]: Start accepts. Automaton has 5145 states and 7066 transitions. Word has length 154 [2022-11-03 02:48:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:52,217 INFO L495 AbstractCegarLoop]: Abstraction has 5145 states and 7066 transitions. [2022-11-03 02:48:52,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:48:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5145 states and 7066 transitions. [2022-11-03 02:48:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-03 02:48:52,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:52,242 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:52,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:52,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-03 02:48:52,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:48:52,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:52,653 INFO L85 PathProgramCache]: Analyzing trace with hash 164275885, now seen corresponding path program 1 times [2022-11-03 02:48:52,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:52,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232870136] [2022-11-03 02:48:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:52,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:52,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:52,658 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:52,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:48:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:54,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:48:54,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-03 02:48:54,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-03 02:48:54,481 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232870136] [2022-11-03 02:48:54,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232870136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [735980650] [2022-11-03 02:48:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:54,482 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:54,484 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:54,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 02:48:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:55,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:48:55,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-03 02:48:55,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:48:55,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [735980650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:48:55,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:55,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-03 02:48:55,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031023418] [2022-11-03 02:48:55,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:48:55,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:48:55,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:55,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:48:55,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:48:55,977 INFO L87 Difference]: Start difference. First operand 5145 states and 7066 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:48:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:56,215 INFO L93 Difference]: Finished difference Result 7721 states and 10630 transitions. [2022-11-03 02:48:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:48:56,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 170 [2022-11-03 02:48:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:56,250 INFO L225 Difference]: With dead ends: 7721 [2022-11-03 02:48:56,250 INFO L226 Difference]: Without dead ends: 5153 [2022-11-03 02:48:56,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:48:56,264 INFO L413 NwaCegarLoop]: 1150 mSDtfsCounter, 5 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2292 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:56,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2292 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:48:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5153 states. [2022-11-03 02:48:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5153 to 5153. [2022-11-03 02:48:56,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5153 states, 3669 states have (on average 1.3118015808122103) internal successors, (4813), 3723 states have internal predecessors, (4813), 1120 states have call successors, (1120), 362 states have call predecessors, (1120), 363 states have return successors, (1143), 1107 states have call predecessors, (1143), 1119 states have call successors, (1143) [2022-11-03 02:48:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5153 states to 5153 states and 7076 transitions. [2022-11-03 02:48:56,705 INFO L78 Accepts]: Start accepts. Automaton has 5153 states and 7076 transitions. Word has length 170 [2022-11-03 02:48:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:56,705 INFO L495 AbstractCegarLoop]: Abstraction has 5153 states and 7076 transitions. [2022-11-03 02:48:56,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:48:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 5153 states and 7076 transitions. [2022-11-03 02:48:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-03 02:48:56,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:56,724 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:56,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:56,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:57,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:57,144 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash -697237810, now seen corresponding path program 1 times [2022-11-03 02:48:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:57,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907255257] [2022-11-03 02:48:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:57,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:57,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:57,150 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:57,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:48:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:58,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:48:58,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-03 02:48:58,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-03 02:48:58,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907255257] [2022-11-03 02:48:58,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907255257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [98180536] [2022-11-03 02:48:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:58,982 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:58,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:58,983 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:58,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:49:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:00,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:49:00,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-03 02:49:00,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:00,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [98180536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:00,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:49:00,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2022-11-03 02:49:00,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391642694] [2022-11-03 02:49:00,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:00,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:00,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:00,590 INFO L87 Difference]: Start difference. First operand 5153 states and 7076 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:49:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:01,331 INFO L93 Difference]: Finished difference Result 12417 states and 17001 transitions. [2022-11-03 02:49:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:01,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 172 [2022-11-03 02:49:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:01,380 INFO L225 Difference]: With dead ends: 12417 [2022-11-03 02:49:01,380 INFO L226 Difference]: Without dead ends: 7290 [2022-11-03 02:49:01,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:01,408 INFO L413 NwaCegarLoop]: 1770 mSDtfsCounter, 846 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 2755 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:01,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 2755 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:49:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7290 states. [2022-11-03 02:49:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7290 to 7279. [2022-11-03 02:49:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7279 states, 5185 states have (on average 1.3091610414657666) internal successors, (6788), 5257 states have internal predecessors, (6788), 1552 states have call successors, (1552), 538 states have call predecessors, (1552), 541 states have return successors, (1581), 1535 states have call predecessors, (1581), 1551 states have call successors, (1581) [2022-11-03 02:49:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7279 states to 7279 states and 9921 transitions. [2022-11-03 02:49:01,989 INFO L78 Accepts]: Start accepts. Automaton has 7279 states and 9921 transitions. Word has length 172 [2022-11-03 02:49:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:01,990 INFO L495 AbstractCegarLoop]: Abstraction has 7279 states and 9921 transitions. [2022-11-03 02:49:01,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:49:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7279 states and 9921 transitions. [2022-11-03 02:49:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 02:49:02,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:02,016 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:02,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:02,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:02,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:02,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:02,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1907008239, now seen corresponding path program 1 times [2022-11-03 02:49:02,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:02,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274183169] [2022-11-03 02:49:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:02,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:02,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:02,432 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:02,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:49:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:49:03,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:49:04,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-03 02:49:04,212 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:04,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274183169] [2022-11-03 02:49:04,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274183169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:04,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [861460720] [2022-11-03 02:49:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:04,213 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:04,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:04,215 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:04,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 02:49:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:49:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 02:49:05,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:05,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [861460720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:05,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:49:05,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-11-03 02:49:05,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476912893] [2022-11-03 02:49:05,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:05,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:49:05,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:05,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:49:05,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:49:05,775 INFO L87 Difference]: Start difference. First operand 7279 states and 9921 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:49:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:07,286 INFO L93 Difference]: Finished difference Result 17089 states and 23255 transitions. [2022-11-03 02:49:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:49:07,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 188 [2022-11-03 02:49:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:07,351 INFO L225 Difference]: With dead ends: 17089 [2022-11-03 02:49:07,351 INFO L226 Difference]: Without dead ends: 9836 [2022-11-03 02:49:07,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:49:07,380 INFO L413 NwaCegarLoop]: 1956 mSDtfsCounter, 1086 mSDsluCounter, 2818 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 4774 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:07,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 4774 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:49:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2022-11-03 02:49:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 7287. [2022-11-03 02:49:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7287 states, 5193 states have (on average 1.308684767956865) internal successors, (6796), 5265 states have internal predecessors, (6796), 1552 states have call successors, (1552), 538 states have call predecessors, (1552), 541 states have return successors, (1581), 1535 states have call predecessors, (1581), 1551 states have call successors, (1581) [2022-11-03 02:49:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7287 states to 7287 states and 9929 transitions. [2022-11-03 02:49:08,092 INFO L78 Accepts]: Start accepts. Automaton has 7287 states and 9929 transitions. Word has length 188 [2022-11-03 02:49:08,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:08,092 INFO L495 AbstractCegarLoop]: Abstraction has 7287 states and 9929 transitions. [2022-11-03 02:49:08,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:49:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 7287 states and 9929 transitions. [2022-11-03 02:49:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-03 02:49:08,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:08,119 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:08,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:08,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:08,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:08,533 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:08,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1980558453, now seen corresponding path program 1 times [2022-11-03 02:49:08,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:08,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479343079] [2022-11-03 02:49:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:08,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:08,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:08,538 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:08,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:49:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:10,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:49:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-03 02:49:10,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-03 02:49:10,481 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:10,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479343079] [2022-11-03 02:49:10,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479343079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:10,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [198080] [2022-11-03 02:49:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:10,482 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:10,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:10,483 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:10,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 02:49:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:12,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:49:12,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 02:49:12,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:12,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [198080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:12,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:49:12,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-11-03 02:49:12,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088788550] [2022-11-03 02:49:12,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:12,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:49:12,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:12,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:49:12,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:49:12,183 INFO L87 Difference]: Start difference. First operand 7287 states and 9929 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:49:14,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:49:17,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:49:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:17,979 INFO L93 Difference]: Finished difference Result 22369 states and 32168 transitions. [2022-11-03 02:49:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:49:17,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 239 [2022-11-03 02:49:17,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:18,065 INFO L225 Difference]: With dead ends: 22369 [2022-11-03 02:49:18,065 INFO L226 Difference]: Without dead ends: 15108 [2022-11-03 02:49:18,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 709 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:49:18,092 INFO L413 NwaCegarLoop]: 1755 mSDtfsCounter, 1556 mSDsluCounter, 3140 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 191 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 4895 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:18,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 4895 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 8 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 02:49:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15108 states. [2022-11-03 02:49:18,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15108 to 7295. [2022-11-03 02:49:19,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7295 states, 5201 states have (on average 1.3082099596231493) internal successors, (6804), 5273 states have internal predecessors, (6804), 1552 states have call successors, (1552), 538 states have call predecessors, (1552), 541 states have return successors, (1581), 1535 states have call predecessors, (1581), 1551 states have call successors, (1581) [2022-11-03 02:49:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7295 states to 7295 states and 9937 transitions. [2022-11-03 02:49:19,048 INFO L78 Accepts]: Start accepts. Automaton has 7295 states and 9937 transitions. Word has length 239 [2022-11-03 02:49:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:19,049 INFO L495 AbstractCegarLoop]: Abstraction has 7295 states and 9937 transitions. [2022-11-03 02:49:19,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:49:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7295 states and 9937 transitions. [2022-11-03 02:49:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-03 02:49:19,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:19,077 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:19,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:19,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:19,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:19,492 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1858842284, now seen corresponding path program 1 times [2022-11-03 02:49:19,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:19,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378984047] [2022-11-03 02:49:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:19,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:19,496 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:19,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:49:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:21,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 1696 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:49:21,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-03 02:49:21,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-03 02:49:21,510 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378984047] [2022-11-03 02:49:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378984047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [7039538] [2022-11-03 02:49:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:21,511 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:21,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:21,512 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:21,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:49:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:23,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1696 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:49:23,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-03 02:49:23,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:23,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [7039538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:23,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:49:23,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-11-03 02:49:23,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80160448] [2022-11-03 02:49:23,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:23,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:49:23,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:49:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:49:23,366 INFO L87 Difference]: Start difference. First operand 7295 states and 9937 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:49:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:25,084 INFO L93 Difference]: Finished difference Result 17133 states and 23299 transitions. [2022-11-03 02:49:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:49:25,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 235 [2022-11-03 02:49:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:25,133 INFO L225 Difference]: With dead ends: 17133 [2022-11-03 02:49:25,133 INFO L226 Difference]: Without dead ends: 9864 [2022-11-03 02:49:25,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:49:25,158 INFO L413 NwaCegarLoop]: 1960 mSDtfsCounter, 1086 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 4779 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:25,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 4779 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:49:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9864 states. [2022-11-03 02:49:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9864 to 7295. [2022-11-03 02:49:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7295 states, 5201 states have (on average 1.3082099596231493) internal successors, (6804), 5273 states have internal predecessors, (6804), 1552 states have call successors, (1552), 538 states have call predecessors, (1552), 541 states have return successors, (1581), 1535 states have call predecessors, (1581), 1551 states have call successors, (1581) [2022-11-03 02:49:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7295 states to 7295 states and 9937 transitions. [2022-11-03 02:49:25,938 INFO L78 Accepts]: Start accepts. Automaton has 7295 states and 9937 transitions. Word has length 235 [2022-11-03 02:49:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:25,939 INFO L495 AbstractCegarLoop]: Abstraction has 7295 states and 9937 transitions. [2022-11-03 02:49:25,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:49:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 7295 states and 9937 transitions. [2022-11-03 02:49:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-03 02:49:25,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:25,961 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:25,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:26,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:26,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:26,376 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1698652907, now seen corresponding path program 1 times [2022-11-03 02:49:26,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:26,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584023947] [2022-11-03 02:49:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:26,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:26,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:26,380 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:26,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:49:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:27,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:49:27,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-11-03 02:49:28,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-03 02:49:28,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:28,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584023947] [2022-11-03 02:49:28,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584023947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:28,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1014699052] [2022-11-03 02:49:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:28,429 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:28,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:28,431 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:28,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 02:49:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:30,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:49:30,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-11-03 02:49:30,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:30,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1014699052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:30,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:49:30,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 10 [2022-11-03 02:49:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709618502] [2022-11-03 02:49:30,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:30,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:49:30,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:49:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:49:30,339 INFO L87 Difference]: Start difference. First operand 7295 states and 9937 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:49:32,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:49:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:33,518 INFO L93 Difference]: Finished difference Result 15603 states and 21460 transitions. [2022-11-03 02:49:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:49:33,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) Word has length 263 [2022-11-03 02:49:33,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:33,565 INFO L225 Difference]: With dead ends: 15603 [2022-11-03 02:49:33,566 INFO L226 Difference]: Without dead ends: 8334 [2022-11-03 02:49:33,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 779 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:49:33,593 INFO L413 NwaCegarLoop]: 1551 mSDtfsCounter, 560 mSDsluCounter, 5511 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 7062 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:33,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 7062 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:49:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8334 states. [2022-11-03 02:49:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8334 to 7315. [2022-11-03 02:49:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 5217 states have (on average 1.3072647115200307) internal successors, (6820), 5289 states have internal predecessors, (6820), 1552 states have call successors, (1552), 538 states have call predecessors, (1552), 545 states have return successors, (1593), 1539 states have call predecessors, (1593), 1551 states have call successors, (1593) [2022-11-03 02:49:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 9965 transitions. [2022-11-03 02:49:34,554 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 9965 transitions. Word has length 263 [2022-11-03 02:49:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:34,555 INFO L495 AbstractCegarLoop]: Abstraction has 7315 states and 9965 transitions. [2022-11-03 02:49:34,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:49:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 9965 transitions. [2022-11-03 02:49:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-11-03 02:49:34,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:34,582 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:34,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:34,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-11-03 02:49:35,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:35,003 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:35,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:35,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1207808745, now seen corresponding path program 1 times [2022-11-03 02:49:35,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:35,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127348775] [2022-11-03 02:49:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:35,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:35,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:35,007 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:35,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:49:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:36,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:49:36,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-11-03 02:49:36,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-03 02:49:36,985 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:36,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127348775] [2022-11-03 02:49:36,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127348775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:36,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1841278749] [2022-11-03 02:49:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:36,986 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:36,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:36,988 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:36,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 02:49:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:49:38,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 96 proven. 7 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-11-03 02:49:39,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-03 02:49:40,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1841278749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:40,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830604547] [2022-11-03 02:49:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:40,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:40,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:40,326 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:40,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:49:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:49:41,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 96 proven. 7 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-11-03 02:49:42,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-03 02:49:43,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830604547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:43,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:49:43,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-03 02:49:43,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171058339] [2022-11-03 02:49:43,236 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:49:43,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:49:43,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:49:43,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:49:43,245 INFO L87 Difference]: Start difference. First operand 7315 states and 9965 transitions. Second operand has 10 states, 10 states have (on average 38.7) internal successors, (387), 10 states have internal predecessors, (387), 4 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 4 states have call predecessors, (95), 4 states have call successors, (95) [2022-11-03 02:49:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:57,310 INFO L93 Difference]: Finished difference Result 51038 states and 69543 transitions. [2022-11-03 02:49:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:49:57,311 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 38.7) internal successors, (387), 10 states have internal predecessors, (387), 4 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 4 states have call predecessors, (95), 4 states have call successors, (95) Word has length 269 [2022-11-03 02:49:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:57,530 INFO L225 Difference]: With dead ends: 51038 [2022-11-03 02:49:57,530 INFO L226 Difference]: Without dead ends: 43748 [2022-11-03 02:49:57,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1614 GetRequests, 1601 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:49:57,568 INFO L413 NwaCegarLoop]: 2963 mSDtfsCounter, 6580 mSDsluCounter, 10115 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6580 SdHoareTripleChecker+Valid, 13078 SdHoareTripleChecker+Invalid, 3867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:57,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6580 Valid, 13078 Invalid, 3867 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1285 Valid, 2582 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-03 02:49:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43748 states. [2022-11-03 02:50:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43748 to 43678. [2022-11-03 02:50:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43678 states, 31140 states have (on average 1.3082530507385999) internal successors, (40739), 31588 states have internal predecessors, (40739), 9272 states have call successors, (9272), 3218 states have call predecessors, (9272), 3265 states have return successors, (9523), 9183 states have call predecessors, (9523), 9271 states have call successors, (9523) [2022-11-03 02:50:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43678 states to 43678 states and 59534 transitions. [2022-11-03 02:50:02,686 INFO L78 Accepts]: Start accepts. Automaton has 43678 states and 59534 transitions. Word has length 269 [2022-11-03 02:50:02,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:02,687 INFO L495 AbstractCegarLoop]: Abstraction has 43678 states and 59534 transitions. [2022-11-03 02:50:02,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.7) internal successors, (387), 10 states have internal predecessors, (387), 4 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 4 states have call predecessors, (95), 4 states have call successors, (95) [2022-11-03 02:50:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 43678 states and 59534 transitions. [2022-11-03 02:50:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-11-03 02:50:02,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:02,772 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:02,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:03,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:03,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:03,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:50:03,400 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2010225794, now seen corresponding path program 1 times [2022-11-03 02:50:03,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:03,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122163330] [2022-11-03 02:50:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:03,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:03,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:03,406 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:03,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:50:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:50:05,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-03 02:50:06,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:06,063 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:06,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122163330] [2022-11-03 02:50:06,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122163330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:06,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:06,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:50:06,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000249149] [2022-11-03 02:50:06,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:06,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:50:06,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:06,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:50:06,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:50:06,067 INFO L87 Difference]: Start difference. First operand 43678 states and 59534 transitions. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 6 states have internal predecessors, (148), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 02:50:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:10,679 INFO L93 Difference]: Finished difference Result 87759 states and 119559 transitions. [2022-11-03 02:50:10,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:50:10,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 6 states have internal predecessors, (148), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) Word has length 272 [2022-11-03 02:50:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:10,894 INFO L225 Difference]: With dead ends: 87759 [2022-11-03 02:50:10,894 INFO L226 Difference]: Without dead ends: 44110 [2022-11-03 02:50:11,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:50:11,008 INFO L413 NwaCegarLoop]: 1147 mSDtfsCounter, 2 mSDsluCounter, 6870 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8017 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:11,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8017 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:50:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44110 states. [2022-11-03 02:50:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44110 to 43822. [2022-11-03 02:50:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43822 states, 31260 states have (on average 1.307069737683941) internal successors, (40859), 31684 states have internal predecessors, (40859), 9272 states have call successors, (9272), 3218 states have call predecessors, (9272), 3289 states have return successors, (9571), 9231 states have call predecessors, (9571), 9271 states have call successors, (9571) [2022-11-03 02:50:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43822 states to 43822 states and 59702 transitions. [2022-11-03 02:50:16,494 INFO L78 Accepts]: Start accepts. Automaton has 43822 states and 59702 transitions. Word has length 272 [2022-11-03 02:50:16,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:16,495 INFO L495 AbstractCegarLoop]: Abstraction has 43822 states and 59702 transitions. [2022-11-03 02:50:16,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 6 states have internal predecessors, (148), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 02:50:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand 43822 states and 59702 transitions. [2022-11-03 02:50:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-03 02:50:16,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:16,551 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:16,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:16,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:50:16,776 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:16,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:16,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2126872004, now seen corresponding path program 2 times [2022-11-03 02:50:16,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:50:16,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276553312] [2022-11-03 02:50:16,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:50:16,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:50:16,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:50:16,781 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:50:16,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daa2418b-00bf-4a58-afb7-dfca69470c76/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:50:17,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-03 02:50:17,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:50:17,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:50:17,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-11-03 02:50:18,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:18,030 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:18,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276553312] [2022-11-03 02:50:18,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276553312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:18,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:18,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:50:18,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103891636] [2022-11-03 02:50:18,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:18,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:50:18,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:50:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:50:18,034 INFO L87 Difference]: Start difference. First operand 43822 states and 59702 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2022-11-03 02:50:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:26,208 INFO L93 Difference]: Finished difference Result 107470 states and 147078 transitions. [2022-11-03 02:50:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:50:26,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 278 [2022-11-03 02:50:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:26,506 INFO L225 Difference]: With dead ends: 107470 [2022-11-03 02:50:26,507 INFO L226 Difference]: Without dead ends: 63677 [2022-11-03 02:50:26,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:50:26,646 INFO L413 NwaCegarLoop]: 1769 mSDtfsCounter, 1594 mSDsluCounter, 2224 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1594 SdHoareTripleChecker+Valid, 3993 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:26,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1594 Valid, 3993 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:50:26,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63677 states.