./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS --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 be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 --- 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-8393723 [2022-11-19 08:28:00,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:28:00,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:28:00,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:28:00,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:28:00,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:28:00,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:28:00,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:28:00,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:28:00,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:28:00,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:28:00,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:28:00,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:28:00,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:28:00,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:28:00,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:28:00,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:28:00,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:28:00,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:28:00,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:28:00,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:28:00,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:28:00,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:28:00,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:28:00,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:28:00,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:28:00,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:28:00,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:28:00,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:28:00,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:28:00,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:28:00,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:28:00,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:28:00,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:28:00,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:28:00,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:28:00,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:28:00,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:28:00,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:28:00,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:28:00,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:28:00,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 08:28:00,493 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:28:00,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:28:00,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:28:00,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:28:00,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:28:00,495 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:28:00,495 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:28:00,495 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:28:00,495 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:28:00,496 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:28:00,496 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:28:00,496 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:28:00,496 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:28:00,497 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:28:00,497 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:28:00,497 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:28:00,497 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:28:00,498 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:28:00,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:28:00,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:28:00,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:28:00,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:28:00,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:28:00,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:28:00,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:28:00,500 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:28:00,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:28:00,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:28:00,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:28:00,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:28:00,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:28:00,501 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:28:00,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:28:00,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:28:00,502 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:28:00,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:28:00,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:28:00,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:28:00,503 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_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 [2022-11-19 08:28:00,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:28:00,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:28:00,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:28:00,758 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:28:00,759 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:28:00,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2022-11-19 08:28:00,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/data/a462f9332/14268b70cd1045b89708d16094b0ddbe/FLAG45a635772 [2022-11-19 08:28:01,596 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:28:01,596 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2022-11-19 08:28:01,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/data/a462f9332/14268b70cd1045b89708d16094b0ddbe/FLAG45a635772 [2022-11-19 08:28:02,130 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/data/a462f9332/14268b70cd1045b89708d16094b0ddbe [2022-11-19 08:28:02,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:28:02,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:28:02,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:28:02,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:28:02,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:28:02,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:28:02" (1/1) ... [2022-11-19 08:28:02,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c39db6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:02, skipping insertion in model container [2022-11-19 08:28:02,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:28:02" (1/1) ... [2022-11-19 08:28:02,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:28:02,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:28:03,112 WARN L234 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_a37944f9-20ed-42ac-9480-c9ec3dd20aed/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2022-11-19 08:28:03,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:28:03,686 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:28:03,854 WARN L234 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_a37944f9-20ed-42ac-9480-c9ec3dd20aed/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2022-11-19 08:28:04,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:28:04,093 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:28:04,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04 WrapperNode [2022-11-19 08:28:04,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:28:04,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:28:04,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:28:04,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:28:04,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (1/1) ... [2022-11-19 08:28:04,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (1/1) ... [2022-11-19 08:28:04,336 INFO L138 Inliner]: procedures = 169, calls = 735, calls flagged for inlining = 77, calls inlined = 77, statements flattened = 2017 [2022-11-19 08:28:04,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:28:04,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:28:04,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:28:04,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:28:04,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (1/1) ... [2022-11-19 08:28:04,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (1/1) ... [2022-11-19 08:28:04,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (1/1) ... [2022-11-19 08:28:04,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (1/1) ... [2022-11-19 08:28:04,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (1/1) ... [2022-11-19 08:28:04,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (1/1) ... [2022-11-19 08:28:04,457 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (1/1) ... [2022-11-19 08:28:04,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (1/1) ... [2022-11-19 08:28:04,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:28:04,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:28:04,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:28:04,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:28:04,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (1/1) ... [2022-11-19 08:28:04,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:28:04,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:04,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:28:04,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:28:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-19 08:28:04,573 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-19 08:28:04,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 08:28:04,573 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_18 [2022-11-19 08:28:04,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_18 [2022-11-19 08:28:04,573 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2022-11-19 08:28:04,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2022-11-19 08:28:04,574 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_3 [2022-11-19 08:28:04,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_3 [2022-11-19 08:28:04,574 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2022-11-19 08:28:04,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2022-11-19 08:28:04,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 08:28:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 08:28:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 08:28:04,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 08:28:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:28:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-19 08:28:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-19 08:28:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_bulk_callback [2022-11-19 08:28:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_bulk_callback [2022-11-19 08:28:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-19 08:28:04,577 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-19 08:28:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-19 08:28:04,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-19 08:28:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_control_cmd [2022-11-19 08:28:04,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_control_cmd [2022-11-19 08:28:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-19 08:28:04,578 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-19 08:28:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-19 08:28:04,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-19 08:28:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 08:28:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 08:28:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-19 08:28:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-19 08:28:04,579 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-19 08:28:04,579 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-19 08:28:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-19 08:28:04,580 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-19 08:28:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 08:28:04,580 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 08:28:04,580 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-19 08:28:04,580 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-19 08:28:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:28:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 08:28:04,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 08:28:04,581 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 08:28:04,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 08:28:04,582 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:28:04,583 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:28:04,583 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-19 08:28:04,583 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-19 08:28:04,584 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_command_msg [2022-11-19 08:28:04,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_command_msg [2022-11-19 08:28:04,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:28:04,584 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-19 08:28:04,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-19 08:28:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-11-19 08:28:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-11-19 08:28:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:28:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-19 08:28:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-19 08:28:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-19 08:28:04,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-19 08:28:04,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:28:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:28:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_write_mode [2022-11-19 08:28:04,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_write_mode [2022-11-19 08:28:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 08:28:04,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 08:28:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-19 08:28:04,586 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-19 08:28:04,586 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-19 08:28:04,587 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-19 08:28:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:28:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_disconnect [2022-11-19 08:28:04,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_disconnect [2022-11-19 08:28:04,587 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-19 08:28:04,587 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-19 08:28:04,588 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-19 08:28:04,588 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-19 08:28:04,588 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_interrupt_callback [2022-11-19 08:28:04,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_interrupt_callback [2022-11-19 08:28:04,588 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-19 08:28:04,589 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-19 08:28:04,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:28:04,589 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-11-19 08:28:04,589 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-11-19 08:28:04,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:28:04,591 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_rx_err [2022-11-19 08:28:04,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_rx_err [2022-11-19 08:28:04,591 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-19 08:28:04,591 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-19 08:28:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-19 08:28:04,592 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-19 08:28:04,592 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-19 08:28:04,594 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-19 08:28:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-19 08:28:04,595 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-19 08:28:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-19 08:28:04,595 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-19 08:28:04,595 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-19 08:28:04,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-19 08:28:04,596 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-19 08:28:04,596 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-19 08:28:04,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:28:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-19 08:28:04,597 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-19 08:28:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 08:28:04,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-19 08:28:04,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-19 08:28:04,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:28:04,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:28:05,175 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:28:05,181 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:28:05,480 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 08:28:06,243 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-19 08:28:09,048 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:28:09,675 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:28:09,675 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 08:28:09,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:28:09 BoogieIcfgContainer [2022-11-19 08:28:09,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:28:09,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:28:09,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:28:09,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:28:09,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:28:02" (1/3) ... [2022-11-19 08:28:09,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74220b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:28:09, skipping insertion in model container [2022-11-19 08:28:09,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:04" (2/3) ... [2022-11-19 08:28:09,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74220b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:28:09, skipping insertion in model container [2022-11-19 08:28:09,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:28:09" (3/3) ... [2022-11-19 08:28:09,695 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2022-11-19 08:28:09,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:28:09,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:28:09,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:28:09,846 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;@79147a80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:28:09,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:28:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 484 states, 301 states have (on average 1.372093023255814) internal successors, (413), 325 states have internal predecessors, (413), 135 states have call successors, (135), 48 states have call predecessors, (135), 46 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2022-11-19 08:28:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:28:09,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:09,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:09,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1052913893, now seen corresponding path program 1 times [2022-11-19 08:28:09,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:09,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362934586] [2022-11-19 08:28:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:09,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:28:10,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:10,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362934586] [2022-11-19 08:28:10,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362934586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:10,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:10,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:10,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084163155] [2022-11-19 08:28:10,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:10,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:10,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:10,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:10,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:10,527 INFO L87 Difference]: Start difference. First operand has 484 states, 301 states have (on average 1.372093023255814) internal successors, (413), 325 states have internal predecessors, (413), 135 states have call successors, (135), 48 states have call predecessors, (135), 46 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:28:13,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:16,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:17,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:17,388 INFO L93 Difference]: Finished difference Result 1418 states and 1985 transitions. [2022-11-19 08:28:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:17,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-19 08:28:17,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:17,411 INFO L225 Difference]: With dead ends: 1418 [2022-11-19 08:28:17,411 INFO L226 Difference]: Without dead ends: 919 [2022-11-19 08:28:17,417 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 [2022-11-19 08:28:17,420 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 629 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:17,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 1255 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 206 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-11-19 08:28:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-11-19 08:28:17,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2022-11-19 08:28:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 580 states have (on average 1.3413793103448275) internal successors, (778), 608 states have internal predecessors, (778), 248 states have call successors, (248), 91 states have call predecessors, (248), 90 states have return successors, (246), 233 states have call predecessors, (246), 243 states have call successors, (246) [2022-11-19 08:28:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1272 transitions. [2022-11-19 08:28:17,556 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1272 transitions. Word has length 23 [2022-11-19 08:28:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:17,557 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1272 transitions. [2022-11-19 08:28:17,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:28:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1272 transitions. [2022-11-19 08:28:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:28:17,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:17,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:17,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:28:17,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2135066031, now seen corresponding path program 1 times [2022-11-19 08:28:17,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:17,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950626048] [2022-11-19 08:28:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:17,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:28:18,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950626048] [2022-11-19 08:28:18,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950626048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:18,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:18,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:18,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850676576] [2022-11-19 08:28:18,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:18,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:18,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:18,067 INFO L87 Difference]: Start difference. First operand 919 states and 1272 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:28:20,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:23,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:24,178 INFO L93 Difference]: Finished difference Result 1621 states and 2230 transitions. [2022-11-19 08:28:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:24,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-11-19 08:28:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:24,195 INFO L225 Difference]: With dead ends: 1621 [2022-11-19 08:28:24,195 INFO L226 Difference]: Without dead ends: 1618 [2022-11-19 08:28:24,197 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 [2022-11-19 08:28:24,198 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 471 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:24,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 1200 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 204 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-11-19 08:28:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-11-19 08:28:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1606. [2022-11-19 08:28:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1021 states have (on average 1.3486777668952008) internal successors, (1377), 1075 states have internal predecessors, (1377), 416 states have call successors, (416), 171 states have call predecessors, (416), 168 states have return successors, (420), 385 states have call predecessors, (420), 411 states have call successors, (420) [2022-11-19 08:28:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2213 transitions. [2022-11-19 08:28:24,313 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2213 transitions. Word has length 32 [2022-11-19 08:28:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:24,314 INFO L495 AbstractCegarLoop]: Abstraction has 1606 states and 2213 transitions. [2022-11-19 08:28:24,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:28:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2213 transitions. [2022-11-19 08:28:24,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:28:24,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:24,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:24,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:28:24,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:24,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1762850011, now seen corresponding path program 1 times [2022-11-19 08:28:24,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:24,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395205177] [2022-11-19 08:28:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:24,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:28:24,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:24,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395205177] [2022-11-19 08:28:24,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395205177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:24,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:24,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:24,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256348290] [2022-11-19 08:28:24,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:24,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:24,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:24,693 INFO L87 Difference]: Start difference. First operand 1606 states and 2213 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:28:27,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:28,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:28,806 INFO L93 Difference]: Finished difference Result 1612 states and 2219 transitions. [2022-11-19 08:28:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:28,806 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-11-19 08:28:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:28,816 INFO L225 Difference]: With dead ends: 1612 [2022-11-19 08:28:28,816 INFO L226 Difference]: Without dead ends: 1609 [2022-11-19 08:28:28,818 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 [2022-11-19 08:28:28,822 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 629 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:28,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 555 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-11-19 08:28:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-19 08:28:28,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2022-11-19 08:28:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1023 states have (on average 1.3470185728250244) internal successors, (1378), 1077 states have internal predecessors, (1378), 415 states have call successors, (415), 172 states have call predecessors, (415), 170 states have return successors, (423), 385 states have call predecessors, (423), 411 states have call successors, (423) [2022-11-19 08:28:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2216 transitions. [2022-11-19 08:28:28,931 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2216 transitions. Word has length 33 [2022-11-19 08:28:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:28,932 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 2216 transitions. [2022-11-19 08:28:28,932 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:28:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2216 transitions. [2022-11-19 08:28:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 08:28:28,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:28,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:28,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:28:28,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:28,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1185916884, now seen corresponding path program 1 times [2022-11-19 08:28:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:28,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858518797] [2022-11-19 08:28:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:28,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:28:29,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:29,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858518797] [2022-11-19 08:28:29,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858518797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:29,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:29,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:29,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424457856] [2022-11-19 08:28:29,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:29,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:29,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:29,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:29,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:29,104 INFO L87 Difference]: Start difference. First operand 1609 states and 2216 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:28:31,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:34,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:34,831 INFO L93 Difference]: Finished difference Result 2504 states and 3453 transitions. [2022-11-19 08:28:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:34,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-11-19 08:28:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:34,844 INFO L225 Difference]: With dead ends: 2504 [2022-11-19 08:28:34,844 INFO L226 Difference]: Without dead ends: 2501 [2022-11-19 08:28:34,845 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 [2022-11-19 08:28:34,846 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 614 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:34,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1210 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-11-19 08:28:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2022-11-19 08:28:34,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2496. [2022-11-19 08:28:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 1584 states have (on average 1.3446969696969697) internal successors, (2130), 1664 states have internal predecessors, (2130), 651 states have call successors, (651), 262 states have call predecessors, (651), 260 states have return successors, (665), 609 states have call predecessors, (665), 647 states have call successors, (665) [2022-11-19 08:28:35,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3446 transitions. [2022-11-19 08:28:35,006 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3446 transitions. Word has length 34 [2022-11-19 08:28:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:35,007 INFO L495 AbstractCegarLoop]: Abstraction has 2496 states and 3446 transitions. [2022-11-19 08:28:35,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:28:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3446 transitions. [2022-11-19 08:28:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 08:28:35,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:35,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:35,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:28:35,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:35,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1891585016, now seen corresponding path program 1 times [2022-11-19 08:28:35,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:35,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748277659] [2022-11-19 08:28:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:35,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:28:35,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:35,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748277659] [2022-11-19 08:28:35,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748277659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:35,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:35,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:35,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597107577] [2022-11-19 08:28:35,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:35,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:35,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:35,161 INFO L87 Difference]: Start difference. First operand 2496 states and 3446 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:28:37,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:39,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:39,146 INFO L93 Difference]: Finished difference Result 2498 states and 3447 transitions. [2022-11-19 08:28:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:39,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-11-19 08:28:39,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:39,158 INFO L225 Difference]: With dead ends: 2498 [2022-11-19 08:28:39,158 INFO L226 Difference]: Without dead ends: 2495 [2022-11-19 08:28:39,160 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 [2022-11-19 08:28:39,160 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 625 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:39,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 553 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-11-19 08:28:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2022-11-19 08:28:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2495. [2022-11-19 08:28:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1584 states have (on average 1.3440656565656566) internal successors, (2129), 1663 states have internal predecessors, (2129), 650 states have call successors, (650), 262 states have call predecessors, (650), 260 states have return successors, (665), 609 states have call predecessors, (665), 647 states have call successors, (665) [2022-11-19 08:28:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3444 transitions. [2022-11-19 08:28:39,333 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3444 transitions. Word has length 35 [2022-11-19 08:28:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:39,334 INFO L495 AbstractCegarLoop]: Abstraction has 2495 states and 3444 transitions. [2022-11-19 08:28:39,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:28:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3444 transitions. [2022-11-19 08:28:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:28:39,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:39,336 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:39,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:28:39,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:39,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1490108759, now seen corresponding path program 1 times [2022-11-19 08:28:39,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:39,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868505955] [2022-11-19 08:28:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:39,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:28:39,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:39,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868505955] [2022-11-19 08:28:39,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868505955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:39,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:39,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:39,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059922038] [2022-11-19 08:28:39,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:39,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:39,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:39,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:39,461 INFO L87 Difference]: Start difference. First operand 2495 states and 3444 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:28:41,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:43,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:43,513 INFO L93 Difference]: Finished difference Result 2497 states and 3445 transitions. [2022-11-19 08:28:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:43,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-11-19 08:28:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:43,527 INFO L225 Difference]: With dead ends: 2497 [2022-11-19 08:28:43,527 INFO L226 Difference]: Without dead ends: 2488 [2022-11-19 08:28:43,529 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 [2022-11-19 08:28:43,531 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 622 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:43,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 552 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-19 08:28:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2022-11-19 08:28:43,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2488. [2022-11-19 08:28:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 1578 states have (on average 1.3422053231939164) internal successors, (2118), 1656 states have internal predecessors, (2118), 649 states have call successors, (649), 262 states have call predecessors, (649), 260 states have return successors, (665), 609 states have call predecessors, (665), 647 states have call successors, (665) [2022-11-19 08:28:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 3432 transitions. [2022-11-19 08:28:43,717 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 3432 transitions. Word has length 36 [2022-11-19 08:28:43,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:43,717 INFO L495 AbstractCegarLoop]: Abstraction has 2488 states and 3432 transitions. [2022-11-19 08:28:43,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:28:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 3432 transitions. [2022-11-19 08:28:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 08:28:43,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:43,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-19 08:28:43,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:28:43,724 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash 125919299, now seen corresponding path program 1 times [2022-11-19 08:28:43,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:43,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569760929] [2022-11-19 08:28:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:43,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:28:43,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:43,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569760929] [2022-11-19 08:28:43,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569760929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:43,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:43,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:43,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945607136] [2022-11-19 08:28:43,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:43,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:43,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:43,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:43,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:43,898 INFO L87 Difference]: Start difference. First operand 2488 states and 3432 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:47,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:49,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:49,789 INFO L93 Difference]: Finished difference Result 5645 states and 7715 transitions. [2022-11-19 08:28:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:49,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2022-11-19 08:28:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:49,806 INFO L225 Difference]: With dead ends: 5645 [2022-11-19 08:28:49,806 INFO L226 Difference]: Without dead ends: 3162 [2022-11-19 08:28:49,814 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 [2022-11-19 08:28:49,815 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 166 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:49,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 1119 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-11-19 08:28:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-11-19 08:28:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 3142. [2022-11-19 08:28:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 1997 states have (on average 1.329994992488733) internal successors, (2656), 2081 states have internal predecessors, (2656), 796 states have call successors, (796), 352 states have call predecessors, (796), 348 states have return successors, (812), 748 states have call predecessors, (812), 794 states have call successors, (812) [2022-11-19 08:28:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4264 transitions. [2022-11-19 08:28:50,073 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4264 transitions. Word has length 70 [2022-11-19 08:28:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:50,073 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 4264 transitions. [2022-11-19 08:28:50,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4264 transitions. [2022-11-19 08:28:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 08:28:50,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:50,077 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2022-11-19 08:28:50,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:28:50,077 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:50,078 INFO L85 PathProgramCache]: Analyzing trace with hash -491974563, now seen corresponding path program 1 times [2022-11-19 08:28:50,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:50,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458144223] [2022-11-19 08:28:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:50,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:28:50,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:50,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458144223] [2022-11-19 08:28:50,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458144223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:50,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:50,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:50,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544730790] [2022-11-19 08:28:50,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:50,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:50,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:50,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:50,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:50,272 INFO L87 Difference]: Start difference. First operand 3142 states and 4264 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:28:54,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:56,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:28:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:57,021 INFO L93 Difference]: Finished difference Result 7001 states and 9473 transitions. [2022-11-19 08:28:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:57,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 82 [2022-11-19 08:28:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:57,039 INFO L225 Difference]: With dead ends: 7001 [2022-11-19 08:28:57,039 INFO L226 Difference]: Without dead ends: 3870 [2022-11-19 08:28:57,049 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 [2022-11-19 08:28:57,049 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 170 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:57,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1213 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 232 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-11-19 08:28:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2022-11-19 08:28:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3850. [2022-11-19 08:28:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3850 states, 2472 states have (on average 1.3264563106796117) internal successors, (3279), 2562 states have internal predecessors, (3279), 942 states have call successors, (942), 441 states have call predecessors, (942), 435 states have return successors, (958), 886 states have call predecessors, (958), 940 states have call successors, (958) [2022-11-19 08:28:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 5179 transitions. [2022-11-19 08:28:57,383 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 5179 transitions. Word has length 82 [2022-11-19 08:28:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:57,384 INFO L495 AbstractCegarLoop]: Abstraction has 3850 states and 5179 transitions. [2022-11-19 08:28:57,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:28:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 5179 transitions. [2022-11-19 08:28:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 08:28:57,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:57,388 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-19 08:28:57,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:28:57,389 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:57,389 INFO L85 PathProgramCache]: Analyzing trace with hash -395499138, now seen corresponding path program 1 times [2022-11-19 08:28:57,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:57,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8139467] [2022-11-19 08:28:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:57,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:28:57,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:57,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8139467] [2022-11-19 08:28:57,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8139467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:57,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:57,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:57,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932521297] [2022-11-19 08:28:57,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:57,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:57,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:57,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:57,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:57,552 INFO L87 Difference]: Start difference. First operand 3850 states and 5179 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 08:28:59,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:02,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:05,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:05,731 INFO L93 Difference]: Finished difference Result 10095 states and 13669 transitions. [2022-11-19 08:29:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:29:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2022-11-19 08:29:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:05,760 INFO L225 Difference]: With dead ends: 10095 [2022-11-19 08:29:05,760 INFO L226 Difference]: Without dead ends: 6256 [2022-11-19 08:29:05,771 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 [2022-11-19 08:29:05,771 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 543 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:05,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1346 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2022-11-19 08:29:05,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2022-11-19 08:29:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 6237. [2022-11-19 08:29:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6237 states, 4064 states have (on average 1.3398129921259843) internal successors, (5445), 4226 states have internal predecessors, (5445), 1494 states have call successors, (1494), 686 states have call predecessors, (1494), 678 states have return successors, (1528), 1404 states have call predecessors, (1528), 1492 states have call successors, (1528) [2022-11-19 08:29:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6237 states to 6237 states and 8467 transitions. [2022-11-19 08:29:06,326 INFO L78 Accepts]: Start accepts. Automaton has 6237 states and 8467 transitions. Word has length 87 [2022-11-19 08:29:06,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:06,326 INFO L495 AbstractCegarLoop]: Abstraction has 6237 states and 8467 transitions. [2022-11-19 08:29:06,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 08:29:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6237 states and 8467 transitions. [2022-11-19 08:29:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-19 08:29:06,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:06,334 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-11-19 08:29:06,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:29:06,334 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:06,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:06,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1983564981, now seen corresponding path program 1 times [2022-11-19 08:29:06,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:06,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45114344] [2022-11-19 08:29:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:06,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:29:07,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45114344] [2022-11-19 08:29:07,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45114344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:29:07,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335198577] [2022-11-19 08:29:07,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:07,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:07,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:29:07,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:29:07,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:29:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:07,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:29:07,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 08:29:07,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:29:07,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335198577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:07,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:29:07,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-19 08:29:07,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956801745] [2022-11-19 08:29:07,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:07,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:29:07,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:29:07,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:29:07,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:29:07,882 INFO L87 Difference]: Start difference. First operand 6237 states and 8467 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 08:29:13,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:15,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:16,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:18,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:19,536 INFO L93 Difference]: Finished difference Result 13053 states and 18192 transitions. [2022-11-19 08:29:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:29:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2022-11-19 08:29:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:19,573 INFO L225 Difference]: With dead ends: 13053 [2022-11-19 08:29:19,573 INFO L226 Difference]: Without dead ends: 8525 [2022-11-19 08:29:19,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:29:19,587 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 314 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 90 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1954 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:19,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 1954 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 326 Invalid, 2 Unknown, 0 Unchecked, 11.1s Time] [2022-11-19 08:29:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2022-11-19 08:29:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 6261. [2022-11-19 08:29:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6261 states, 4088 states have (on average 1.3378180039138943) internal successors, (5469), 4250 states have internal predecessors, (5469), 1494 states have call successors, (1494), 686 states have call predecessors, (1494), 678 states have return successors, (1528), 1404 states have call predecessors, (1528), 1492 states have call successors, (1528) [2022-11-19 08:29:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6261 states to 6261 states and 8491 transitions. [2022-11-19 08:29:20,266 INFO L78 Accepts]: Start accepts. Automaton has 6261 states and 8491 transitions. Word has length 91 [2022-11-19 08:29:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:20,267 INFO L495 AbstractCegarLoop]: Abstraction has 6261 states and 8491 transitions. [2022-11-19 08:29:20,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 08:29:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 6261 states and 8491 transitions. [2022-11-19 08:29:20,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-19 08:29:20,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:20,272 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:29:20,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:29:20,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:20,481 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:20,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:20,482 INFO L85 PathProgramCache]: Analyzing trace with hash 839022254, now seen corresponding path program 1 times [2022-11-19 08:29:20,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:20,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016802196] [2022-11-19 08:29:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:20,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:29:20,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:20,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016802196] [2022-11-19 08:29:20,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016802196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:29:20,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:29:20,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:29:20,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202983402] [2022-11-19 08:29:20,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:29:20,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:29:20,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:29:20,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:29:20,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:29:20,728 INFO L87 Difference]: Start difference. First operand 6261 states and 8491 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:29:24,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:27,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:29:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:29:27,703 INFO L93 Difference]: Finished difference Result 10837 states and 14718 transitions. [2022-11-19 08:29:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:29:27,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 99 [2022-11-19 08:29:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:29:27,725 INFO L225 Difference]: With dead ends: 10837 [2022-11-19 08:29:27,725 INFO L226 Difference]: Without dead ends: 6279 [2022-11-19 08:29:27,737 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 [2022-11-19 08:29:27,738 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 0 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:29:27,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1089 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 197 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-11-19 08:29:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6279 states. [2022-11-19 08:29:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6279 to 6279. [2022-11-19 08:29:28,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6279 states, 4106 states have (on average 1.3363370677057964) internal successors, (5487), 4268 states have internal predecessors, (5487), 1494 states have call successors, (1494), 686 states have call predecessors, (1494), 678 states have return successors, (1528), 1404 states have call predecessors, (1528), 1492 states have call successors, (1528) [2022-11-19 08:29:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6279 states to 6279 states and 8509 transitions. [2022-11-19 08:29:28,230 INFO L78 Accepts]: Start accepts. Automaton has 6279 states and 8509 transitions. Word has length 99 [2022-11-19 08:29:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:29:28,231 INFO L495 AbstractCegarLoop]: Abstraction has 6279 states and 8509 transitions. [2022-11-19 08:29:28,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:29:28,232 INFO L276 IsEmpty]: Start isEmpty. Operand 6279 states and 8509 transitions. [2022-11-19 08:29:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-19 08:29:28,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:29:28,237 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:29:28,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:29:28,237 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:29:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:29:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1231685399, now seen corresponding path program 1 times [2022-11-19 08:29:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:29:28,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821487848] [2022-11-19 08:29:28,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:28,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:29:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:29:28,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:28,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821487848] [2022-11-19 08:29:28,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821487848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:29:28,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479249040] [2022-11-19 08:29:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:29:28,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:29:28,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:29:28,508 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:29:28,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:29:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:29,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:29:29,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:29:29,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:29:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:29:29,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479249040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:29:29,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1081694184] [2022-11-19 08:29:29,437 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-19 08:29:29,437 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:29:29,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:29:29,446 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:29:29,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:29:31,002 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 175 [2022-11-19 08:29:31,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:31,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 78 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 107 [2022-11-19 08:29:32,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:32,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:32,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:32,851 INFO L217 Elim1Store]: Index analysis took 193 ms [2022-11-19 08:29:33,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-11-19 08:29:33,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 9 [2022-11-19 08:29:33,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-19 08:29:33,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-19 08:29:35,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 509 treesize of output 401 [2022-11-19 08:29:35,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:35,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-11-19 08:29:35,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-11-19 08:29:36,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 509 treesize of output 401 [2022-11-19 08:29:36,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:36,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-11-19 08:29:36,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-11-19 08:30:06,556 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 227 for LOIs [2022-11-19 08:30:06,751 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 649 for LOIs [2022-11-19 08:30:07,165 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:30:16,071 WARN L233 SmtUtils]: Spent 8.45s on a formula simplification that was a NOOP. DAG size: 1010 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:30:32,567 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 655 DAG size of output: 652 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:30:58,031 WARN L233 SmtUtils]: Spent 25.18s on a formula simplification. DAG size of input: 928 DAG size of output: 833 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:22,432 WARN L233 SmtUtils]: Spent 24.13s on a formula simplification. DAG size of input: 808 DAG size of output: 765 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:50,711 WARN L233 SmtUtils]: Spent 9.99s on a formula simplification. DAG size of input: 784 DAG size of output: 745 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:14,798 WARN L233 SmtUtils]: Spent 23.56s on a formula simplification. DAG size of input: 798 DAG size of output: 755 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:25,626 WARN L233 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 801 DAG size of output: 758 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:36,324 WARN L233 SmtUtils]: Spent 10.16s on a formula simplification. DAG size of input: 791 DAG size of output: 748 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:47,764 WARN L233 SmtUtils]: Spent 10.91s on a formula simplification. DAG size of input: 821 DAG size of output: 778 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:10,883 WARN L233 SmtUtils]: Spent 11.64s on a formula simplification. DAG size of input: 845 DAG size of output: 786 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:23,277 WARN L233 SmtUtils]: Spent 11.74s on a formula simplification. DAG size of input: 849 DAG size of output: 790 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:26,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1081694184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:33:26,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:33:26,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [4, 4, 4] total 38 [2022-11-19 08:33:26,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453167071] [2022-11-19 08:33:26,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:33:26,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 08:33:26,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:26,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 08:33:26,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:33:26,213 INFO L87 Difference]: Start difference. First operand 6279 states and 8509 transitions. Second operand has 33 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-19 08:33:47,275 WARN L233 SmtUtils]: Spent 17.20s on a formula simplification. DAG size of input: 1033 DAG size of output: 1017 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:34:05,220 WARN L233 SmtUtils]: Spent 17.46s on a formula simplification. DAG size of input: 1041 DAG size of output: 1025 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:34:23,458 WARN L233 SmtUtils]: Spent 17.77s on a formula simplification. DAG size of input: 1047 DAG size of output: 1031 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:34:32,384 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 1014 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:34:41,168 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification that was a NOOP. DAG size: 1018 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:34:50,522 WARN L233 SmtUtils]: Spent 8.41s on a formula simplification that was a NOOP. DAG size: 1023 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:35:06,871 WARN L233 SmtUtils]: Spent 14.95s on a formula simplification. DAG size of input: 917 DAG size of output: 660 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:35:19,640 WARN L233 SmtUtils]: Spent 12.14s on a formula simplification. DAG size of input: 927 DAG size of output: 670 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:35:42,328 WARN L233 SmtUtils]: Spent 21.04s on a formula simplification. DAG size of input: 849 DAG size of output: 836 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:06,709 WARN L233 SmtUtils]: Spent 22.13s on a formula simplification. DAG size of input: 849 DAG size of output: 836 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:34,743 WARN L233 SmtUtils]: Spent 13.75s on a formula simplification. DAG size of input: 795 DAG size of output: 756 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:49,735 WARN L233 SmtUtils]: Spent 13.73s on a formula simplification. DAG size of input: 876 DAG size of output: 746 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:36,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:38,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:40,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:42,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:43,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:46,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:48,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:01,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:14,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:17,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:20,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:23,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:27,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:28,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:30,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:32,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:35,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:38,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:39,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:41,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:42,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:44,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:47,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:50,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:52,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:08,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:10,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:12,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:14,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:16,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:18,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:21,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:23,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:24,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:26,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:29,728 INFO L93 Difference]: Finished difference Result 12949 states and 17597 transitions. [2022-11-19 08:39:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-19 08:39:29,729 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 100 [2022-11-19 08:39:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:29,752 INFO L225 Difference]: With dead ends: 12949 [2022-11-19 08:39:29,752 INFO L226 Difference]: Without dead ends: 6673 [2022-11-19 08:39:29,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 391.4s TimeCoverageRelationStatistics Valid=297, Invalid=2673, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 08:39:29,768 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 285 mSDsluCounter, 6309 mSDsCounter, 0 mSdLazyCounter, 4675 mSolverCounterSat, 101 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 6963 SdHoareTripleChecker+Invalid, 4790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4675 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:29,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 6963 Invalid, 4790 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [101 Valid, 4675 Invalid, 14 Unknown, 0 Unchecked, 170.2s Time] [2022-11-19 08:39:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2022-11-19 08:39:30,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 6525. [2022-11-19 08:39:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6525 states, 4336 states have (on average 1.3390221402214022) internal successors, (5806), 4501 states have internal predecessors, (5806), 1502 states have call successors, (1502), 690 states have call predecessors, (1502), 686 states have return successors, (1543), 1413 states have call predecessors, (1543), 1500 states have call successors, (1543) [2022-11-19 08:39:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 8851 transitions. [2022-11-19 08:39:30,414 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 8851 transitions. Word has length 100 [2022-11-19 08:39:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:30,414 INFO L495 AbstractCegarLoop]: Abstraction has 6525 states and 8851 transitions. [2022-11-19 08:39:30,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-19 08:39:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 8851 transitions. [2022-11-19 08:39:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-19 08:39:30,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:30,422 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:30,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:30,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:39:30,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:39:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:30,631 INFO L85 PathProgramCache]: Analyzing trace with hash -713450255, now seen corresponding path program 1 times [2022-11-19 08:39:30,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:39:30,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935007178] [2022-11-19 08:39:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:30,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:39:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:39:30,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:39:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935007178] [2022-11-19 08:39:30,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935007178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:39:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706968439] [2022-11-19 08:39:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:30,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:39:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:39:30,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:39:30,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a37944f9-20ed-42ac-9480-c9ec3dd20aed/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:39:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:31,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:39:31,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:39:31,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:39:31,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706968439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851378590] [2022-11-19 08:39:31,958 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-19 08:39:31,958 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:39:31,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:39:31,960 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:39:31,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:39:32,980 INFO L350 Elim1Store]: Elim1 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 197 treesize of output 175 [2022-11-19 08:39:33,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:33,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 78 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 107 [2022-11-19 08:39:34,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:34,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:34,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:34,747 INFO L217 Elim1Store]: Index analysis took 207 ms [2022-11-19 08:39:35,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-11-19 08:39:35,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 9 [2022-11-19 08:39:35,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-19 08:39:35,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-19 08:39:36,116 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:39:36,123 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-19 08:39:36,130 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:39:37,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 509 treesize of output 401 [2022-11-19 08:39:37,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:37,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-11-19 08:39:37,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-11-19 08:39:38,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 509 treesize of output 401 [2022-11-19 08:39:38,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-11-19 08:39:38,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:38,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-11-19 08:39:44,354 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:39:44,468 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:39:44,595 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:39:49,191 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:39:49,320 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:39:49,486 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:40:03,685 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 223 for LOIs [2022-11-19 08:40:04,046 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:40:04,079 INFO L350 Elim1Store]: Elim1 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 [2022-11-19 08:40:04,106 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-19 08:40:06,501 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 251 for LOIs [2022-11-19 08:40:06,877 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 123 for LOIs [2022-11-19 08:40:06,933 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:40:18,170 WARN L233 SmtUtils]: Spent 10.47s on a formula simplification that was a NOOP. DAG size: 1010 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:46,931 WARN L233 SmtUtils]: Spent 25.04s on a formula simplification. DAG size of input: 773 DAG size of output: 668 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:12,857 WARN L233 SmtUtils]: Spent 25.68s on a formula simplification. DAG size of input: 777 DAG size of output: 674 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:48,066 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 346 DAG size of output: 272 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)