./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fa270183f30c4108ea2b2e80e3a005f959ee3ae47a4a31957eaa79c7226d5c4e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:51:21,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:51:21,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:51:21,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:51:21,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:51:21,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:51:21,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:51:21,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:51:21,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:51:21,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:51:21,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:51:21,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:51:21,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:51:21,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:51:21,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:51:21,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:51:21,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:51:21,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:51:21,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:51:21,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:51:21,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:51:21,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:51:21,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:51:21,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:51:21,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:51:21,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:51:21,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:51:21,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:51:21,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:51:21,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:51:21,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:51:21,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:51:21,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:51:21,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:51:21,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:51:21,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:51:21,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:51:21,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:51:21,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:51:21,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:51:21,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:51:21,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:51:21,488 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:51:21,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:51:21,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:51:21,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:51:21,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:51:21,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:51:21,493 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:51:21,494 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:51:21,494 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:51:21,494 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:51:21,495 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:51:21,496 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:51:21,496 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:51:21,496 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:51:21,497 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:51:21,497 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:51:21,497 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:51:21,497 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:51:21,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:51:21,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:51:21,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:51:21,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:51:21,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:51:21,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:51:21,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:51:21,502 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:51:21,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:51:21,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:51:21,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:51:21,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:51:21,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:51:21,504 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:51:21,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:51:21,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:51:21,505 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:51:21,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:51:21,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:51:21,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:51:21,506 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_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa270183f30c4108ea2b2e80e3a005f959ee3ae47a4a31957eaa79c7226d5c4e [2022-11-03 03:51:21,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:51:21,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:51:21,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:51:21,955 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:51:21,956 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:51:21,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i [2022-11-03 03:51:22,046 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/data/ec033e877/2aae3adac11d4a6a8c4c7e40be2e71f5/FLAG9bfcbc93d [2022-11-03 03:51:23,200 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:51:23,202 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i [2022-11-03 03:51:23,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/data/ec033e877/2aae3adac11d4a6a8c4c7e40be2e71f5/FLAG9bfcbc93d [2022-11-03 03:51:23,467 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/data/ec033e877/2aae3adac11d4a6a8c4c7e40be2e71f5 [2022-11-03 03:51:23,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:51:23,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:51:23,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:51:23,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:51:23,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:51:23,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:23" (1/1) ... [2022-11-03 03:51:23,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22671a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:23, skipping insertion in model container [2022-11-03 03:51:23,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:51:23" (1/1) ... [2022-11-03 03:51:23,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:51:23,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:51:25,987 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i[277190,277203] [2022-11-03 03:51:26,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:51:26,335 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:51:26,934 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i[277190,277203] [2022-11-03 03:51:26,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:51:27,118 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:51:27,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27 WrapperNode [2022-11-03 03:51:27,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:51:27,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:51:27,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:51:27,122 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:51:27,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,478 INFO L138 Inliner]: procedures = 225, calls = 1809, calls flagged for inlining = 92, calls inlined = 81, statements flattened = 3779 [2022-11-03 03:51:27,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:51:27,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:51:27,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:51:27,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:51:27,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,796 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:51:27,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:51:27,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:51:27,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:51:27,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (1/1) ... [2022-11-03 03:51:27,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:51:27,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:27,921 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:51:27,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:51:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-03 03:51:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-03 03:51:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 03:51:27,969 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 03:51:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 03:51:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 03:51:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 03:51:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 03:51:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 03:51:27,970 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 03:51:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_semusb_of_ttusb [2022-11-03 03:51:27,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_semusb_of_ttusb [2022-11-03 03:51:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_unregister_adapter [2022-11-03 03:51:27,971 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_unregister_adapter [2022-11-03 03:51:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:51:27,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:51:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 03:51:27,972 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 03:51:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 03:51:27,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 03:51:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure __symbol_put [2022-11-03 03:51:27,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __symbol_put [2022-11-03 03:51:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 03:51:27,973 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 03:51:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:51:27,973 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:51:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmx_release [2022-11-03 03:51:27,973 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmx_release [2022-11-03 03:51:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 03:51:27,974 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 03:51:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:51:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 03:51:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:51:27,974 INFO L130 BoogieDeclarations]: Found specification of procedure tda1004x_writereg [2022-11-03 03:51:27,974 INFO L138 BoogieDeclarations]: Found implementation of procedure tda1004x_writereg [2022-11-03 03:51:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2022-11-03 03:51:27,975 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2022-11-03 03:51:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:51:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2022-11-03 03:51:27,975 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2022-11-03 03:51:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:51:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_semi2c_of_ttusb [2022-11-03 03:51:27,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_semi2c_of_ttusb [2022-11-03 03:51:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-11-03 03:51:27,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-11-03 03:51:27,976 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-03 03:51:27,977 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-03 03:51:27,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 03:51:27,978 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-03 03:51:27,979 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-03 03:51:27,980 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-03 03:51:27,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-03 03:51:27,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 03:51:27,980 INFO L130 BoogieDeclarations]: Found specification of procedure master_xfer [2022-11-03 03:51:27,981 INFO L138 BoogieDeclarations]: Found implementation of procedure master_xfer [2022-11-03 03:51:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-03 03:51:27,981 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-03 03:51:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:51:27,981 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_frontend_detach [2022-11-03 03:51:27,983 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_frontend_detach [2022-11-03 03:51:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 03:51:27,983 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 03:51:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~$Pointer$ [2022-11-03 03:51:27,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~$Pointer$ [2022-11-03 03:51:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 03:51:27,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 03:51:27,984 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_stop_iso_xfer [2022-11-03 03:51:27,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_stop_iso_xfer [2022-11-03 03:51:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 03:51:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 03:51:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:51:27,985 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_transfer [2022-11-03 03:51:27,986 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_transfer [2022-11-03 03:51:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 03:51:27,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 03:51:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_cmd [2022-11-03 03:51:27,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_cmd [2022-11-03 03:51:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:51:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 03:51:27,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 03:51:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:51:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 03:51:27,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 03:51:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:51:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure __symbol_get [2022-11-03 03:51:27,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __symbol_get [2022-11-03 03:51:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmxdev_release [2022-11-03 03:51:27,991 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmxdev_release [2022-11-03 03:51:27,992 INFO L130 BoogieDeclarations]: Found specification of procedure request_firmware [2022-11-03 03:51:27,992 INFO L138 BoogieDeclarations]: Found implementation of procedure request_firmware [2022-11-03 03:51:27,992 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_del_adapter [2022-11-03 03:51:27,993 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_del_adapter [2022-11-03 03:51:27,993 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_result [2022-11-03 03:51:27,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_result [2022-11-03 03:51:27,994 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_semi2c_of_ttusb [2022-11-03 03:51:27,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_semi2c_of_ttusb [2022-11-03 03:51:27,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:51:27,995 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_free_iso_urbs [2022-11-03 03:51:27,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_free_iso_urbs [2022-11-03 03:51:27,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:51:27,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:51:29,017 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:51:29,022 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:51:30,061 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 03:51:39,829 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:51:40,460 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:51:40,460 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 03:51:40,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:40 BoogieIcfgContainer [2022-11-03 03:51:40,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:51:40,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:51:40,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:51:40,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:51:40,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:51:23" (1/3) ... [2022-11-03 03:51:40,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a20ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:40, skipping insertion in model container [2022-11-03 03:51:40,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:51:27" (2/3) ... [2022-11-03 03:51:40,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a20ca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:40, skipping insertion in model container [2022-11-03 03:51:40,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:40" (3/3) ... [2022-11-03 03:51:40,485 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--media--usb--ttusb-budget--dvb-ttusb-budget.ko-entry_point.cil.out.i [2022-11-03 03:51:40,522 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:51:40,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:51:40,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:51:40,649 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;@30c71c94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:51:40,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:51:40,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 645 states, 427 states have (on average 1.4473067915690867) internal successors, (618), 455 states have internal predecessors, (618), 175 states have call successors, (175), 42 states have call predecessors, (175), 41 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-11-03 03:51:40,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 03:51:40,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:40,684 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:40,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:40,692 INFO L85 PathProgramCache]: Analyzing trace with hash -259257477, now seen corresponding path program 1 times [2022-11-03 03:51:40,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:40,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407390768] [2022-11-03 03:51:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:40,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-03 03:51:42,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:42,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407390768] [2022-11-03 03:51:42,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407390768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:42,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:42,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:51:42,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654478412] [2022-11-03 03:51:42,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:42,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:42,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:42,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:42,060 INFO L87 Difference]: Start difference. First operand has 645 states, 427 states have (on average 1.4473067915690867) internal successors, (618), 455 states have internal predecessors, (618), 175 states have call successors, (175), 42 states have call predecessors, (175), 41 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:51:45,924 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 [] [2022-11-03 03:51:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:47,451 INFO L93 Difference]: Finished difference Result 1869 states and 2882 transitions. [2022-11-03 03:51:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:47,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 111 [2022-11-03 03:51:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:47,483 INFO L225 Difference]: With dead ends: 1869 [2022-11-03 03:51:47,483 INFO L226 Difference]: Without dead ends: 1231 [2022-11-03 03:51:47,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:47,502 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 886 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1811 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:47,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1811 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-11-03 03:51:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-11-03 03:51:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1224. [2022-11-03 03:51:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 828 states have (on average 1.4275362318840579) internal successors, (1182), 859 states have internal predecessors, (1182), 316 states have call successors, (316), 80 states have call predecessors, (316), 79 states have return successors, (306), 306 states have call predecessors, (306), 306 states have call successors, (306) [2022-11-03 03:51:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1804 transitions. [2022-11-03 03:51:47,691 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1804 transitions. Word has length 111 [2022-11-03 03:51:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:47,692 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1804 transitions. [2022-11-03 03:51:47,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 03:51:47,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1804 transitions. [2022-11-03 03:51:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:51:47,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:47,697 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:47,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:51:47,698 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:47,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2125340474, now seen corresponding path program 1 times [2022-11-03 03:51:47,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:47,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824820627] [2022-11-03 03:51:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:47,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-03 03:51:48,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:48,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824820627] [2022-11-03 03:51:48,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824820627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:48,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:48,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:51:48,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928069669] [2022-11-03 03:51:48,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:48,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:48,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:48,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:48,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:48,264 INFO L87 Difference]: Start difference. First operand 1224 states and 1804 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:51:50,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:51:52,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:51:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:54,817 INFO L93 Difference]: Finished difference Result 3577 states and 5272 transitions. [2022-11-03 03:51:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:51:54,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 124 [2022-11-03 03:51:54,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:54,839 INFO L225 Difference]: With dead ends: 3577 [2022-11-03 03:51:54,840 INFO L226 Difference]: Without dead ends: 2376 [2022-11-03 03:51:54,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:54,849 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 886 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:54,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1777 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-03 03:51:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-11-03 03:51:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2357. [2022-11-03 03:51:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 1605 states have (on average 1.4317757009345795) internal successors, (2298), 1659 states have internal predecessors, (2298), 594 states have call successors, (594), 158 states have call predecessors, (594), 157 states have return successors, (584), 583 states have call predecessors, (584), 584 states have call successors, (584) [2022-11-03 03:51:55,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3476 transitions. [2022-11-03 03:51:55,098 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3476 transitions. Word has length 124 [2022-11-03 03:51:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:55,099 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 3476 transitions. [2022-11-03 03:51:55,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:51:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3476 transitions. [2022-11-03 03:51:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 03:51:55,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:55,117 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:55,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:51:55,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:55,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash -824058902, now seen corresponding path program 1 times [2022-11-03 03:51:55,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:55,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575174592] [2022-11-03 03:51:55,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:55,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-03 03:51:55,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:55,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575174592] [2022-11-03 03:51:55,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575174592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:55,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:55,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:51:55,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107206314] [2022-11-03 03:51:55,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:55,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:51:55,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:55,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:51:55,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:51:55,690 INFO L87 Difference]: Start difference. First operand 2357 states and 3476 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:51:58,835 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 [] [2022-11-03 03:52:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:01,693 INFO L93 Difference]: Finished difference Result 6985 states and 10305 transitions. [2022-11-03 03:52:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:52:01,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 122 [2022-11-03 03:52:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:01,733 INFO L225 Difference]: With dead ends: 6985 [2022-11-03 03:52:01,734 INFO L226 Difference]: Without dead ends: 4651 [2022-11-03 03:52:01,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:01,754 INFO L413 NwaCegarLoop]: 969 mSDtfsCounter, 910 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:01,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 1755 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 03:52:01,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2022-11-03 03:52:02,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4633. [2022-11-03 03:52:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 3161 states have (on average 1.4318253717178109) internal successors, (4526), 3259 states have internal predecessors, (4526), 1160 states have call successors, (1160), 312 states have call predecessors, (1160), 311 states have return successors, (1150), 1149 states have call predecessors, (1150), 1150 states have call successors, (1150) [2022-11-03 03:52:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 6836 transitions. [2022-11-03 03:52:02,169 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 6836 transitions. Word has length 122 [2022-11-03 03:52:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:02,172 INFO L495 AbstractCegarLoop]: Abstraction has 4633 states and 6836 transitions. [2022-11-03 03:52:02,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:52:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 6836 transitions. [2022-11-03 03:52:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 03:52:02,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:02,174 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:02,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:52:02,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:02,177 INFO L85 PathProgramCache]: Analyzing trace with hash -2060908597, now seen corresponding path program 1 times [2022-11-03 03:52:02,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:52:02,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395522364] [2022-11-03 03:52:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:02,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:52:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-03 03:52:02,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:52:02,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395522364] [2022-11-03 03:52:02,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395522364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:02,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:52:02,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:52:02,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970438542] [2022-11-03 03:52:02,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:02,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:52:02,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:52:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:52:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:02,593 INFO L87 Difference]: Start difference. First operand 4633 states and 6836 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:52:05,050 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 [] [2022-11-03 03:52:07,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:09,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:11,096 INFO L93 Difference]: Finished difference Result 10151 states and 14922 transitions. [2022-11-03 03:52:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:52:11,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 123 [2022-11-03 03:52:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:11,140 INFO L225 Difference]: With dead ends: 10151 [2022-11-03 03:52:11,140 INFO L226 Difference]: Without dead ends: 5549 [2022-11-03 03:52:11,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:11,166 INFO L413 NwaCegarLoop]: 945 mSDtfsCounter, 269 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:11,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1732 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 236 Invalid, 3 Unknown, 0 Unchecked, 8.2s Time] [2022-11-03 03:52:11,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2022-11-03 03:52:11,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 5528. [2022-11-03 03:52:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5528 states, 3808 states have (on average 1.430672268907563) internal successors, (5448), 3906 states have internal predecessors, (5448), 1328 states have call successors, (1328), 392 states have call predecessors, (1328), 391 states have return successors, (1318), 1317 states have call predecessors, (1318), 1318 states have call successors, (1318) [2022-11-03 03:52:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5528 states to 5528 states and 8094 transitions. [2022-11-03 03:52:11,619 INFO L78 Accepts]: Start accepts. Automaton has 5528 states and 8094 transitions. Word has length 123 [2022-11-03 03:52:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:11,620 INFO L495 AbstractCegarLoop]: Abstraction has 5528 states and 8094 transitions. [2022-11-03 03:52:11,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 03:52:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 5528 states and 8094 transitions. [2022-11-03 03:52:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 03:52:11,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:11,625 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:11,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:52:11,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:11,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1775921189, now seen corresponding path program 1 times [2022-11-03 03:52:11,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:52:11,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528144186] [2022-11-03 03:52:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:11,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:52:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-03 03:52:12,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:52:12,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528144186] [2022-11-03 03:52:12,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528144186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:12,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:52:12,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:52:12,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685901410] [2022-11-03 03:52:12,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:12,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:52:12,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:52:12,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:52:12,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:12,094 INFO L87 Difference]: Start difference. First operand 5528 states and 8094 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 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) [2022-11-03 03:52:14,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:17,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:19,241 INFO L93 Difference]: Finished difference Result 10974 states and 16070 transitions. [2022-11-03 03:52:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:52:19,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 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 126 [2022-11-03 03:52:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:19,316 INFO L225 Difference]: With dead ends: 10974 [2022-11-03 03:52:19,316 INFO L226 Difference]: Without dead ends: 10971 [2022-11-03 03:52:19,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:19,325 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 882 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:19,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 1770 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 03:52:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2022-11-03 03:52:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 10964. [2022-11-03 03:52:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10964 states, 7568 states have (on average 1.431686046511628) internal successors, (10835), 7755 states have internal predecessors, (10835), 2618 states have call successors, (2618), 778 states have call predecessors, (2618), 777 states have return successors, (2608), 2606 states have call predecessors, (2608), 2608 states have call successors, (2608) [2022-11-03 03:52:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10964 states to 10964 states and 16061 transitions. [2022-11-03 03:52:20,256 INFO L78 Accepts]: Start accepts. Automaton has 10964 states and 16061 transitions. Word has length 126 [2022-11-03 03:52:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:20,258 INFO L495 AbstractCegarLoop]: Abstraction has 10964 states and 16061 transitions. [2022-11-03 03:52:20,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 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) [2022-11-03 03:52:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 10964 states and 16061 transitions. [2022-11-03 03:52:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:52:20,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:20,264 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:20,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:52:20,265 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:20,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:20,266 INFO L85 PathProgramCache]: Analyzing trace with hash -781221455, now seen corresponding path program 1 times [2022-11-03 03:52:20,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:52:20,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113334197] [2022-11-03 03:52:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:20,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:52:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-03 03:52:20,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:52:20,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113334197] [2022-11-03 03:52:20,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113334197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:20,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:52:20,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:52:20,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306591721] [2022-11-03 03:52:20,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:20,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:52:20,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:52:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:52:20,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:20,804 INFO L87 Difference]: Start difference. First operand 10964 states and 16061 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 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) [2022-11-03 03:52:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:23,676 INFO L93 Difference]: Finished difference Result 10966 states and 16062 transitions. [2022-11-03 03:52:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:52:23,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 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 127 [2022-11-03 03:52:23,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:23,735 INFO L225 Difference]: With dead ends: 10966 [2022-11-03 03:52:23,735 INFO L226 Difference]: Without dead ends: 10963 [2022-11-03 03:52:23,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:23,741 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 899 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:23,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 818 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:52:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10963 states. [2022-11-03 03:52:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10963 to 10963. [2022-11-03 03:52:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10963 states, 7568 states have (on average 1.431553911205074) internal successors, (10834), 7754 states have internal predecessors, (10834), 2617 states have call successors, (2617), 778 states have call predecessors, (2617), 777 states have return successors, (2608), 2606 states have call predecessors, (2608), 2608 states have call successors, (2608) [2022-11-03 03:52:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10963 states to 10963 states and 16059 transitions. [2022-11-03 03:52:24,522 INFO L78 Accepts]: Start accepts. Automaton has 10963 states and 16059 transitions. Word has length 127 [2022-11-03 03:52:24,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:24,523 INFO L495 AbstractCegarLoop]: Abstraction has 10963 states and 16059 transitions. [2022-11-03 03:52:24,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 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) [2022-11-03 03:52:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 10963 states and 16059 transitions. [2022-11-03 03:52:24,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 03:52:24,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:24,526 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:24,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:52:24,527 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1551740072, now seen corresponding path program 1 times [2022-11-03 03:52:24,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:52:24,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605633695] [2022-11-03 03:52:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:24,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:52:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-03 03:52:24,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:52:24,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605633695] [2022-11-03 03:52:24,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605633695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:24,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:52:24,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:52:24,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561149676] [2022-11-03 03:52:24,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:24,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:52:24,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:52:24,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:52:24,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:24,976 INFO L87 Difference]: Start difference. First operand 10963 states and 16059 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 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) [2022-11-03 03:52:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:27,043 INFO L93 Difference]: Finished difference Result 10965 states and 16060 transitions. [2022-11-03 03:52:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:52:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 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 128 [2022-11-03 03:52:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:27,105 INFO L225 Difference]: With dead ends: 10965 [2022-11-03 03:52:27,106 INFO L226 Difference]: Without dead ends: 10962 [2022-11-03 03:52:27,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:27,115 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 896 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:27,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 816 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 03:52:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10962 states. [2022-11-03 03:52:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10962 to 10962. [2022-11-03 03:52:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10962 states, 7568 states have (on average 1.4314217758985202) internal successors, (10833), 7753 states have internal predecessors, (10833), 2616 states have call successors, (2616), 778 states have call predecessors, (2616), 777 states have return successors, (2608), 2606 states have call predecessors, (2608), 2608 states have call successors, (2608) [2022-11-03 03:52:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10962 states to 10962 states and 16057 transitions. [2022-11-03 03:52:28,081 INFO L78 Accepts]: Start accepts. Automaton has 10962 states and 16057 transitions. Word has length 128 [2022-11-03 03:52:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:28,081 INFO L495 AbstractCegarLoop]: Abstraction has 10962 states and 16057 transitions. [2022-11-03 03:52:28,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 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) [2022-11-03 03:52:28,082 INFO L276 IsEmpty]: Start isEmpty. Operand 10962 states and 16057 transitions. [2022-11-03 03:52:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 03:52:28,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:28,084 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:28,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:52:28,085 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:28,086 INFO L85 PathProgramCache]: Analyzing trace with hash 859108244, now seen corresponding path program 1 times [2022-11-03 03:52:28,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:52:28,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132385315] [2022-11-03 03:52:28,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:28,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:52:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-03 03:52:28,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:52:28,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132385315] [2022-11-03 03:52:28,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132385315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:28,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:52:28,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:52:28,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156325602] [2022-11-03 03:52:28,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:28,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:52:28,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:52:28,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:52:28,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:28,501 INFO L87 Difference]: Start difference. First operand 10962 states and 16057 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 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) [2022-11-03 03:52:30,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:33,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:35,413 INFO L93 Difference]: Finished difference Result 16935 states and 24872 transitions. [2022-11-03 03:52:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:52:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 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 129 [2022-11-03 03:52:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:35,504 INFO L225 Difference]: With dead ends: 16935 [2022-11-03 03:52:35,504 INFO L226 Difference]: Without dead ends: 16930 [2022-11-03 03:52:35,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:35,517 INFO L413 NwaCegarLoop]: 925 mSDtfsCounter, 730 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:35,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1507 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 214 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2022-11-03 03:52:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16930 states. [2022-11-03 03:52:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16930 to 16925. [2022-11-03 03:52:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16925 states, 11859 states have (on average 1.433088793321528) internal successors, (16995), 12062 states have internal predecessors, (16995), 3748 states have call successors, (3748), 1334 states have call predecessors, (3748), 1317 states have return successors, (4076), 3720 states have call predecessors, (4076), 3740 states have call successors, (4076) [2022-11-03 03:52:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16925 states to 16925 states and 24819 transitions. [2022-11-03 03:52:36,891 INFO L78 Accepts]: Start accepts. Automaton has 16925 states and 24819 transitions. Word has length 129 [2022-11-03 03:52:36,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:36,892 INFO L495 AbstractCegarLoop]: Abstraction has 16925 states and 24819 transitions. [2022-11-03 03:52:36,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 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) [2022-11-03 03:52:36,893 INFO L276 IsEmpty]: Start isEmpty. Operand 16925 states and 24819 transitions. [2022-11-03 03:52:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 03:52:36,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:36,895 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:36,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:52:36,895 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash 862362923, now seen corresponding path program 1 times [2022-11-03 03:52:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:52:36,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352339717] [2022-11-03 03:52:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:36,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:52:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-03 03:52:37,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:52:37,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352339717] [2022-11-03 03:52:37,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352339717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:37,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:52:37,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:52:37,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717196982] [2022-11-03 03:52:37,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:37,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:52:37,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:52:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:52:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:37,322 INFO L87 Difference]: Start difference. First operand 16925 states and 24819 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 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) [2022-11-03 03:52:39,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:42,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:45,351 INFO L93 Difference]: Finished difference Result 48873 states and 74011 transitions. [2022-11-03 03:52:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:52:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 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 130 [2022-11-03 03:52:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:45,537 INFO L225 Difference]: With dead ends: 48873 [2022-11-03 03:52:45,537 INFO L226 Difference]: Without dead ends: 31978 [2022-11-03 03:52:45,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:52:45,626 INFO L413 NwaCegarLoop]: 1231 mSDtfsCounter, 886 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:45,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 2007 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 247 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-03 03:52:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31978 states. [2022-11-03 03:52:48,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31978 to 31785. [2022-11-03 03:52:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31785 states, 22463 states have (on average 1.4319102524150826) internal successors, (32165), 22886 states have internal predecessors, (32165), 6875 states have call successors, (6875), 2497 states have call predecessors, (6875), 2446 states have return successors, (9113), 6785 states have call predecessors, (9113), 6801 states have call successors, (9113) [2022-11-03 03:52:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31785 states to 31785 states and 48153 transitions. [2022-11-03 03:52:48,353 INFO L78 Accepts]: Start accepts. Automaton has 31785 states and 48153 transitions. Word has length 130 [2022-11-03 03:52:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:48,353 INFO L495 AbstractCegarLoop]: Abstraction has 31785 states and 48153 transitions. [2022-11-03 03:52:48,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 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) [2022-11-03 03:52:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 31785 states and 48153 transitions. [2022-11-03 03:52:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-03 03:52:48,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:48,362 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:48,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:52:48,363 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:48,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:48,375 INFO L85 PathProgramCache]: Analyzing trace with hash 9254946, now seen corresponding path program 1 times [2022-11-03 03:52:48,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:52:48,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669440823] [2022-11-03 03:52:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:48,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:52:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-03 03:52:49,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:52:49,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669440823] [2022-11-03 03:52:49,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669440823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:52:49,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:52:49,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:52:49,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519967378] [2022-11-03 03:52:49,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:52:49,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:52:49,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:52:49,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:52:49,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:52:49,375 INFO L87 Difference]: Start difference. First operand 31785 states and 48153 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 03:52:54,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:52:56,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:00,748 INFO L93 Difference]: Finished difference Result 65421 states and 100265 transitions. [2022-11-03 03:53:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:53:00,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 168 [2022-11-03 03:53:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:00,967 INFO L225 Difference]: With dead ends: 65421 [2022-11-03 03:53:00,968 INFO L226 Difference]: Without dead ends: 33672 [2022-11-03 03:53:01,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:53:01,103 INFO L413 NwaCegarLoop]: 861 mSDtfsCounter, 138 mSDsluCounter, 2883 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 27 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 3391 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:01,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 3391 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 503 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2022-11-03 03:53:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33672 states. [2022-11-03 03:53:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33672 to 32853. [2022-11-03 03:53:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32853 states, 23183 states have (on average 1.4278134840184618) internal successors, (33101), 23702 states have internal predecessors, (33101), 7079 states have call successors, (7079), 2545 states have call predecessors, (7079), 2590 states have return successors, (9853), 6989 states have call predecessors, (9853), 7005 states have call successors, (9853) [2022-11-03 03:53:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32853 states to 32853 states and 50033 transitions. [2022-11-03 03:53:03,932 INFO L78 Accepts]: Start accepts. Automaton has 32853 states and 50033 transitions. Word has length 168 [2022-11-03 03:53:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:03,935 INFO L495 AbstractCegarLoop]: Abstraction has 32853 states and 50033 transitions. [2022-11-03 03:53:03,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 5 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 03:53:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 32853 states and 50033 transitions. [2022-11-03 03:53:03,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-03 03:53:03,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:03,941 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:03,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:53:03,941 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:03,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:03,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1306571078, now seen corresponding path program 1 times [2022-11-03 03:53:03,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:03,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641358069] [2022-11-03 03:53:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:03,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-03 03:53:05,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641358069] [2022-11-03 03:53:05,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641358069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:05,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:05,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:53:05,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093586060] [2022-11-03 03:53:05,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:05,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:53:05,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:05,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:53:05,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:53:05,445 INFO L87 Difference]: Start difference. First operand 32853 states and 50033 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-03 03:53:09,429 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 [] [2022-11-03 03:53:12,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:12,956 INFO L93 Difference]: Finished difference Result 34347 states and 51725 transitions. [2022-11-03 03:53:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:53:12,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 166 [2022-11-03 03:53:12,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:13,101 INFO L225 Difference]: With dead ends: 34347 [2022-11-03 03:53:13,102 INFO L226 Difference]: Without dead ends: 34344 [2022-11-03 03:53:13,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:53:13,117 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 381 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 88 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:13,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1553 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 229 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-03 03:53:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34344 states. [2022-11-03 03:53:15,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34344 to 34340. [2022-11-03 03:53:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34340 states, 24119 states have (on average 1.4201666735768481) internal successors, (34253), 24637 states have internal predecessors, (34253), 7318 states have call successors, (7318), 2857 states have call predecessors, (7318), 2902 states have return successors, (10093), 7229 states have call predecessors, (10093), 7245 states have call successors, (10093) [2022-11-03 03:53:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34340 states to 34340 states and 51664 transitions. [2022-11-03 03:53:15,596 INFO L78 Accepts]: Start accepts. Automaton has 34340 states and 51664 transitions. Word has length 166 [2022-11-03 03:53:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:15,597 INFO L495 AbstractCegarLoop]: Abstraction has 34340 states and 51664 transitions. [2022-11-03 03:53:15,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-03 03:53:15,597 INFO L276 IsEmpty]: Start isEmpty. Operand 34340 states and 51664 transitions. [2022-11-03 03:53:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 03:53:15,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:15,605 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:15,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:53:15,606 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:15,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:15,607 INFO L85 PathProgramCache]: Analyzing trace with hash 265274931, now seen corresponding path program 1 times [2022-11-03 03:53:15,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:15,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202116072] [2022-11-03 03:53:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:15,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-03 03:53:16,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:16,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202116072] [2022-11-03 03:53:16,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202116072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:16,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:16,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:53:16,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856018056] [2022-11-03 03:53:16,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:16,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:53:16,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:16,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:53:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:16,439 INFO L87 Difference]: Start difference. First operand 34340 states and 51664 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:53:20,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:22,564 INFO L93 Difference]: Finished difference Result 51922 states and 78037 transitions. [2022-11-03 03:53:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:53:22,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 167 [2022-11-03 03:53:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:22,637 INFO L225 Difference]: With dead ends: 51922 [2022-11-03 03:53:22,638 INFO L226 Difference]: Without dead ends: 17614 [2022-11-03 03:53:22,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:22,734 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 13 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:22,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1637 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-03 03:53:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17614 states. [2022-11-03 03:53:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17614 to 17356. [2022-11-03 03:53:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17356 states, 12173 states have (on average 1.4238889345272323) internal successors, (17333), 12439 states have internal predecessors, (17333), 3695 states have call successors, (3695), 1466 states have call predecessors, (3695), 1487 states have return successors, (5078), 3642 states have call predecessors, (5078), 3654 states have call successors, (5078) [2022-11-03 03:53:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17356 states to 17356 states and 26106 transitions. [2022-11-03 03:53:24,106 INFO L78 Accepts]: Start accepts. Automaton has 17356 states and 26106 transitions. Word has length 167 [2022-11-03 03:53:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:24,119 INFO L495 AbstractCegarLoop]: Abstraction has 17356 states and 26106 transitions. [2022-11-03 03:53:24,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:53:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 17356 states and 26106 transitions. [2022-11-03 03:53:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 03:53:24,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:24,143 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:24,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:53:24,143 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash 887846226, now seen corresponding path program 1 times [2022-11-03 03:53:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:24,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349157075] [2022-11-03 03:53:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:24,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-11-03 03:53:24,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:24,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349157075] [2022-11-03 03:53:24,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349157075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:24,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:24,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:53:24,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951880865] [2022-11-03 03:53:24,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:24,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:53:24,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:24,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:53:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:24,695 INFO L87 Difference]: Start difference. First operand 17356 states and 26106 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 03:53:27,711 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 [] [2022-11-03 03:53:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:30,489 INFO L93 Difference]: Finished difference Result 37971 states and 56768 transitions. [2022-11-03 03:53:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:53:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 179 [2022-11-03 03:53:30,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:30,689 INFO L225 Difference]: With dead ends: 37971 [2022-11-03 03:53:30,689 INFO L226 Difference]: Without dead ends: 20678 [2022-11-03 03:53:30,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:53:30,753 INFO L413 NwaCegarLoop]: 902 mSDtfsCounter, 604 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:30,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1388 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 03:53:30,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20678 states. [2022-11-03 03:53:32,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20678 to 20586. [2022-11-03 03:53:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20586 states, 14553 states have (on average 1.415309558166701) internal successors, (20597), 14833 states have internal predecessors, (20597), 4117 states have call successors, (4117), 1878 states have call predecessors, (4117), 1915 states have return successors, (5822), 4066 states have call predecessors, (5822), 4078 states have call successors, (5822) [2022-11-03 03:53:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20586 states to 20586 states and 30536 transitions. [2022-11-03 03:53:32,302 INFO L78 Accepts]: Start accepts. Automaton has 20586 states and 30536 transitions. Word has length 179 [2022-11-03 03:53:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:32,302 INFO L495 AbstractCegarLoop]: Abstraction has 20586 states and 30536 transitions. [2022-11-03 03:53:32,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 03:53:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 20586 states and 30536 transitions. [2022-11-03 03:53:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-03 03:53:32,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:32,311 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:32,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:53:32,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:32,312 INFO L85 PathProgramCache]: Analyzing trace with hash 228932291, now seen corresponding path program 1 times [2022-11-03 03:53:32,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:32,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758471869] [2022-11-03 03:53:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:32,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-03 03:53:33,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758471869] [2022-11-03 03:53:33,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758471869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:33,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:33,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:53:33,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600748689] [2022-11-03 03:53:33,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:33,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:53:33,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:33,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:53:33,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:53:33,543 INFO L87 Difference]: Start difference. First operand 20586 states and 30536 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:53:36,739 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 [] [2022-11-03 03:53:39,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:41,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:42,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:44,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:46,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:49,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:53:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:54,478 INFO L93 Difference]: Finished difference Result 23984 states and 35735 transitions. [2022-11-03 03:53:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:53:54,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 176 [2022-11-03 03:53:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:54,536 INFO L225 Difference]: With dead ends: 23984 [2022-11-03 03:53:54,536 INFO L226 Difference]: Without dead ends: 23973 [2022-11-03 03:53:54,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:53:54,543 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 765 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 312 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:54,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 2054 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1078 Invalid, 6 Unknown, 0 Unchecked, 19.7s Time] [2022-11-03 03:53:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23973 states. [2022-11-03 03:53:55,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23973 to 23444. [2022-11-03 03:53:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23444 states, 16733 states have (on average 1.4222195661268153) internal successors, (23798), 17017 states have internal predecessors, (23798), 4583 states have call successors, (4583), 2062 states have call predecessors, (4583), 2127 states have return successors, (6530), 4564 states have call predecessors, (6530), 4544 states have call successors, (6530) [2022-11-03 03:53:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23444 states to 23444 states and 34911 transitions. [2022-11-03 03:53:55,882 INFO L78 Accepts]: Start accepts. Automaton has 23444 states and 34911 transitions. Word has length 176 [2022-11-03 03:53:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:55,883 INFO L495 AbstractCegarLoop]: Abstraction has 23444 states and 34911 transitions. [2022-11-03 03:53:55,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:53:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 23444 states and 34911 transitions. [2022-11-03 03:53:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-03 03:53:55,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:55,893 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:53:55,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 03:53:55,894 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:55,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2137650590, now seen corresponding path program 1 times [2022-11-03 03:53:55,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:53:55,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589577478] [2022-11-03 03:53:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:55,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:53:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-03 03:53:57,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:53:57,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589577478] [2022-11-03 03:53:57,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589577478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:57,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:57,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:53:57,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375960408] [2022-11-03 03:53:57,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:57,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:53:57,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:53:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:53:57,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:53:57,015 INFO L87 Difference]: Start difference. First operand 23444 states and 34911 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:53:59,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:54:02,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:54:05,361 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 [] [2022-11-03 03:54:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:08,708 INFO L93 Difference]: Finished difference Result 57715 states and 88510 transitions. [2022-11-03 03:54:08,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:54:08,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 186 [2022-11-03 03:54:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:08,833 INFO L225 Difference]: With dead ends: 57715 [2022-11-03 03:54:08,833 INFO L226 Difference]: Without dead ends: 34334 [2022-11-03 03:54:08,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:54:08,898 INFO L413 NwaCegarLoop]: 1519 mSDtfsCounter, 1411 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 293 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:08,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 2299 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 340 Invalid, 3 Unknown, 0 Unchecked, 10.0s Time] [2022-11-03 03:54:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34334 states. [2022-11-03 03:54:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34334 to 33744. [2022-11-03 03:54:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33744 states, 24221 states have (on average 1.4232277775484083) internal successors, (34472), 24564 states have internal predecessors, (34472), 6444 states have call successors, (6444), 2982 states have call predecessors, (6444), 3078 states have return successors, (9813), 6497 states have call predecessors, (9813), 6273 states have call successors, (9813) [2022-11-03 03:54:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33744 states to 33744 states and 50729 transitions. [2022-11-03 03:54:10,879 INFO L78 Accepts]: Start accepts. Automaton has 33744 states and 50729 transitions. Word has length 186 [2022-11-03 03:54:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:10,880 INFO L495 AbstractCegarLoop]: Abstraction has 33744 states and 50729 transitions. [2022-11-03 03:54:10,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:54:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 33744 states and 50729 transitions. [2022-11-03 03:54:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-03 03:54:10,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:10,892 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:10,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 03:54:10,892 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1416174641, now seen corresponding path program 1 times [2022-11-03 03:54:10,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:10,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903757323] [2022-11-03 03:54:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:10,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-03 03:54:11,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:11,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903757323] [2022-11-03 03:54:11,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903757323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:54:11,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:54:11,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:54:11,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049638550] [2022-11-03 03:54:11,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:54:11,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:54:11,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:54:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:54:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:54:11,599 INFO L87 Difference]: Start difference. First operand 33744 states and 50729 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:54:12,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:54:15,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:54:17,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:54:19,568 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 [] [2022-11-03 03:54:22,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:22,549 INFO L93 Difference]: Finished difference Result 67485 states and 101677 transitions. [2022-11-03 03:54:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:54:22,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 187 [2022-11-03 03:54:22,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:22,803 INFO L225 Difference]: With dead ends: 67485 [2022-11-03 03:54:22,803 INFO L226 Difference]: Without dead ends: 33804 [2022-11-03 03:54:22,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:54:22,861 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 0 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:22,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1629 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 3 Unknown, 0 Unchecked, 9.2s Time] [2022-11-03 03:54:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33804 states. [2022-11-03 03:54:24,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33804 to 33804. [2022-11-03 03:54:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33804 states, 24281 states have (on average 1.4221819529673407) internal successors, (34532), 24624 states have internal predecessors, (34532), 6444 states have call successors, (6444), 2982 states have call predecessors, (6444), 3078 states have return successors, (9813), 6497 states have call predecessors, (9813), 6273 states have call successors, (9813) [2022-11-03 03:54:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33804 states to 33804 states and 50789 transitions. [2022-11-03 03:54:24,879 INFO L78 Accepts]: Start accepts. Automaton has 33804 states and 50789 transitions. Word has length 187 [2022-11-03 03:54:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:24,880 INFO L495 AbstractCegarLoop]: Abstraction has 33804 states and 50789 transitions. [2022-11-03 03:54:24,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:54:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 33804 states and 50789 transitions. [2022-11-03 03:54:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-03 03:54:24,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:24,891 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:54:24,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 03:54:24,891 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:24,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1733409208, now seen corresponding path program 1 times [2022-11-03 03:54:24,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:54:24,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707466046] [2022-11-03 03:54:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:24,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:54:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-03 03:54:25,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:25,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707466046] [2022-11-03 03:54:25,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707466046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:54:25,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676737018] [2022-11-03 03:54:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:25,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:25,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:25,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36eb8ac3-1cc1-486e-a062-ffd3b4296f37/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:54:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:26,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 3756 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:54:26,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-03 03:54:27,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-03 03:54:27,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676737018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:27,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1394184285] [2022-11-03 03:54:27,426 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2022-11-03 03:54:27,426 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:54:27,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:54:27,438 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:54:27,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:54:31,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-03 03:54:32,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-03 03:54:32,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-03 03:54:32,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-03 03:54:32,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-03 03:54:33,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:34,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:35,040 INFO L244 Elim1Store]: Index analysis took 1627 ms