./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3b154baf348652a9aadd484f41053a90df6581eb3d7346fd488d4cc05040e74b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:29:55,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:29:55,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:29:55,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:29:55,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:29:55,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:29:55,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:29:55,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:29:55,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:29:55,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:29:55,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:29:55,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:29:55,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:29:55,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:29:55,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:29:55,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:29:55,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:29:55,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:29:55,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:29:55,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:29:55,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:29:55,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:29:55,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:29:55,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:29:55,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:29:55,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:29:55,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:29:55,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:29:55,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:29:55,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:29:55,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:29:55,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:29:55,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:29:55,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:29:55,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:29:55,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:29:55,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:29:55,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:29:55,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:29:55,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:29:55,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:29:55,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:29:55,492 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:29:55,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:29:55,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:29:55,492 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:29:55,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:29:55,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:29:55,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:29:55,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:29:55,494 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:29:55,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:29:55,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:29:55,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:29:55,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:29:55,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:29:55,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:29:55,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:29:55,495 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:29:55,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:29:55,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:29:55,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:29:55,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:29:55,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:29:55,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:29:55,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:29:55,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:29:55,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:29:55,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:29:55,497 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:29:55,498 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:29:55,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:29:55,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:29:55,498 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b154baf348652a9aadd484f41053a90df6581eb3d7346fd488d4cc05040e74b [2021-12-22 14:29:55,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:29:55,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:29:55,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:29:55,707 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:29:55,707 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:29:55,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2021-12-22 14:29:55,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2cae8b9/1d6aac397c2c4c9ab6755442c9278ce0/FLAG0d6b62344 [2021-12-22 14:29:56,241 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:29:56,242 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2021-12-22 14:29:56,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2cae8b9/1d6aac397c2c4c9ab6755442c9278ce0/FLAG0d6b62344 [2021-12-22 14:29:56,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2cae8b9/1d6aac397c2c4c9ab6755442c9278ce0 [2021-12-22 14:29:56,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:29:56,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:29:56,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:29:56,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:29:56,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:29:56,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:29:56" (1/1) ... [2021-12-22 14:29:56,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3557b95d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:56, skipping insertion in model container [2021-12-22 14:29:56,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:29:56" (1/1) ... [2021-12-22 14:29:56,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:29:56,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:29:57,258 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i[119285,119298] [2021-12-22 14:29:57,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:29:57,363 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:29:57,471 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i[119285,119298] [2021-12-22 14:29:57,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:29:57,515 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:29:57,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57 WrapperNode [2021-12-22 14:29:57,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:29:57,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:29:57,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:29:57,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:29:57,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57" (1/1) ... [2021-12-22 14:29:57,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57" (1/1) ... [2021-12-22 14:29:57,629 INFO L137 Inliner]: procedures = 144, calls = 800, calls flagged for inlining = 49, calls inlined = 41, statements flattened = 1426 [2021-12-22 14:29:57,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:29:57,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:29:57,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:29:57,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:29:57,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57" (1/1) ... [2021-12-22 14:29:57,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57" (1/1) ... [2021-12-22 14:29:57,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57" (1/1) ... [2021-12-22 14:29:57,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57" (1/1) ... [2021-12-22 14:29:57,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57" (1/1) ... [2021-12-22 14:29:57,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57" (1/1) ... [2021-12-22 14:29:57,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57" (1/1) ... [2021-12-22 14:29:57,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:29:57,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:29:57,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:29:57,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:29:57,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57" (1/1) ... [2021-12-22 14:29:57,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:29:57,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:29:57,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 14:29:57,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 14:29:57,818 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2021-12-22 14:29:57,819 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2021-12-22 14:29:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2021-12-22 14:29:57,819 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2021-12-22 14:29:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2021-12-22 14:29:57,819 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2021-12-22 14:29:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pt_mutex [2021-12-22 14:29:57,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pt_mutex [2021-12-22 14:29:57,820 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2021-12-22 14:29:57,820 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2021-12-22 14:29:57,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:29:57,820 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2021-12-22 14:29:57,820 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2021-12-22 14:29:57,820 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2021-12-22 14:29:57,820 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2021-12-22 14:29:57,821 INFO L130 BoogieDeclarations]: Found specification of procedure pt_media_access_cmd [2021-12-22 14:29:57,821 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_media_access_cmd [2021-12-22 14:29:57,821 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:29:57,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:29:57,821 INFO L130 BoogieDeclarations]: Found specification of procedure pt_reset [2021-12-22 14:29:57,821 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_reset [2021-12-22 14:29:57,821 INFO L130 BoogieDeclarations]: Found specification of procedure pt_identify [2021-12-22 14:29:57,821 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_identify [2021-12-22 14:29:57,822 INFO L130 BoogieDeclarations]: Found specification of procedure pt_command [2021-12-22 14:29:57,822 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_command [2021-12-22 14:29:57,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:29:57,822 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-22 14:29:57,822 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-22 14:29:57,822 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write [2021-12-22 14:29:57,822 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write [2021-12-22 14:29:57,822 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:29:57,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:29:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 14:29:57,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 14:29:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure pt_atapi [2021-12-22 14:29:57,823 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_atapi [2021-12-22 14:29:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:29:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure pt_poll_dsc [2021-12-22 14:29:57,824 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_poll_dsc [2021-12-22 14:29:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pt_mutex [2021-12-22 14:29:57,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pt_mutex [2021-12-22 14:29:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-22 14:29:57,824 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-22 14:29:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure pt_req_sense [2021-12-22 14:29:57,824 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_req_sense [2021-12-22 14:29:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-12-22 14:29:57,825 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-12-22 14:29:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:29:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_17 [2021-12-22 14:29:57,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_17 [2021-12-22 14:29:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-12-22 14:29:57,825 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-12-22 14:29:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-22 14:29:57,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-22 14:29:57,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:29:57,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:29:57,826 INFO L130 BoogieDeclarations]: Found specification of procedure DRIVE [2021-12-22 14:29:57,827 INFO L138 BoogieDeclarations]: Found implementation of procedure DRIVE [2021-12-22 14:29:57,827 INFO L130 BoogieDeclarations]: Found specification of procedure pt_completion [2021-12-22 14:29:57,828 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_completion [2021-12-22 14:29:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:29:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure pt_sleep [2021-12-22 14:29:57,829 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_sleep [2021-12-22 14:29:57,829 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write_fm [2021-12-22 14:29:57,829 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write_fm [2021-12-22 14:29:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-12-22 14:29:57,830 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-12-22 14:29:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2021-12-22 14:29:57,830 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2021-12-22 14:29:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:29:57,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:29:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2021-12-22 14:29:57,831 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2021-12-22 14:29:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2021-12-22 14:29:57,831 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2021-12-22 14:29:57,831 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-22 14:29:57,834 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-22 14:29:57,834 INFO L130 BoogieDeclarations]: Found specification of procedure pt_wait [2021-12-22 14:29:57,834 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_wait [2021-12-22 14:29:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2021-12-22 14:29:57,835 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2021-12-22 14:29:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure device_destroy [2021-12-22 14:29:57,835 INFO L138 BoogieDeclarations]: Found implementation of procedure device_destroy [2021-12-22 14:29:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure pt_probe [2021-12-22 14:29:57,835 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_probe [2021-12-22 14:29:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:29:57,835 INFO L130 BoogieDeclarations]: Found specification of procedure pt_rewind [2021-12-22 14:29:57,836 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_rewind [2021-12-22 14:29:57,836 INFO L130 BoogieDeclarations]: Found specification of procedure xn [2021-12-22 14:29:57,836 INFO L138 BoogieDeclarations]: Found implementation of procedure xn [2021-12-22 14:29:57,836 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-22 14:29:57,836 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-22 14:29:57,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:29:57,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:29:57,837 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2021-12-22 14:29:57,837 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2021-12-22 14:29:58,136 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:29:58,137 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:30:04,930 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:30:04,947 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:30:04,948 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-22 14:30:04,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:30:04 BoogieIcfgContainer [2021-12-22 14:30:04,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:30:04,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:30:04,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:30:04,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:30:04,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:29:56" (1/3) ... [2021-12-22 14:30:04,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f92207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:30:04, skipping insertion in model container [2021-12-22 14:30:04,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:29:57" (2/3) ... [2021-12-22 14:30:04,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f92207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:30:04, skipping insertion in model container [2021-12-22 14:30:04,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:30:04" (3/3) ... [2021-12-22 14:30:04,959 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pt.ko-main.cil.out.i [2021-12-22 14:30:04,963 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:30:04,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:30:05,009 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:30:05,019 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 14:30:05,019 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:30:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand has 674 states, 467 states have (on average 1.3533190578158458) internal successors, (632), 489 states have internal predecessors, (632), 167 states have call successors, (167), 42 states have call predecessors, (167), 42 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) [2021-12-22 14:30:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 14:30:05,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:05,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:05,062 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:05,067 INFO L85 PathProgramCache]: Analyzing trace with hash 334168328, now seen corresponding path program 1 times [2021-12-22 14:30:05,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:05,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366306117] [2021-12-22 14:30:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:05,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:05,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 14:30:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:05,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:05,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366306117] [2021-12-22 14:30:05,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366306117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:05,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:05,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:30:05,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807204110] [2021-12-22 14:30:05,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:05,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:05,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:05,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:05,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:30:05,385 INFO L87 Difference]: Start difference. First operand has 674 states, 467 states have (on average 1.3533190578158458) internal successors, (632), 489 states have internal predecessors, (632), 167 states have call successors, (167), 42 states have call predecessors, (167), 42 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:05,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:05,695 INFO L93 Difference]: Finished difference Result 1645 states and 2392 transitions. [2021-12-22 14:30:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:05,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-12-22 14:30:05,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:05,721 INFO L225 Difference]: With dead ends: 1645 [2021-12-22 14:30:05,721 INFO L226 Difference]: Without dead ends: 966 [2021-12-22 14:30:05,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:30:05,733 INFO L933 BasicCegarLoop]: 1197 mSDtfsCounter, 439 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2091 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:05,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 2091 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 14:30:05,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-12-22 14:30:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 938. [2021-12-22 14:30:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 645 states have (on average 1.3472868217054264) internal successors, (869), 667 states have internal predecessors, (869), 228 states have call successors, (228), 65 states have call predecessors, (228), 64 states have return successors, (222), 222 states have call predecessors, (222), 222 states have call successors, (222) [2021-12-22 14:30:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1319 transitions. [2021-12-22 14:30:05,868 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1319 transitions. Word has length 19 [2021-12-22 14:30:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:05,868 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1319 transitions. [2021-12-22 14:30:05,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1319 transitions. [2021-12-22 14:30:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 14:30:05,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:05,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:05,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:30:05,873 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash -720822466, now seen corresponding path program 1 times [2021-12-22 14:30:05,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:05,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384573519] [2021-12-22 14:30:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:05,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:05,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:05,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384573519] [2021-12-22 14:30:05,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384573519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:05,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:05,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 14:30:05,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174785922] [2021-12-22 14:30:05,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:05,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:05,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:05,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:30:05,965 INFO L87 Difference]: Start difference. First operand 938 states and 1319 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:30:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:06,031 INFO L93 Difference]: Finished difference Result 1873 states and 2635 transitions. [2021-12-22 14:30:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:06,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 14:30:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:06,037 INFO L225 Difference]: With dead ends: 1873 [2021-12-22 14:30:06,037 INFO L226 Difference]: Without dead ends: 938 [2021-12-22 14:30:06,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:30:06,041 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 918 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:06,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 927 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:30:06,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-12-22 14:30:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2021-12-22 14:30:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 645 states have (on average 1.344186046511628) internal successors, (867), 667 states have internal predecessors, (867), 228 states have call successors, (228), 65 states have call predecessors, (228), 64 states have return successors, (222), 222 states have call predecessors, (222), 222 states have call successors, (222) [2021-12-22 14:30:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1317 transitions. [2021-12-22 14:30:06,074 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1317 transitions. Word has length 19 [2021-12-22 14:30:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:06,074 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1317 transitions. [2021-12-22 14:30:06,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:30:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1317 transitions. [2021-12-22 14:30:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 14:30:06,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:06,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:06,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:30:06,076 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:06,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash 569153980, now seen corresponding path program 1 times [2021-12-22 14:30:06,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:06,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130626546] [2021-12-22 14:30:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:06,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:06,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 14:30:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:06,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:06,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130626546] [2021-12-22 14:30:06,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130626546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:06,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:06,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:30:06,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126734387] [2021-12-22 14:30:06,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:06,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:30:06,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:06,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:30:06,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:30:06,142 INFO L87 Difference]: Start difference. First operand 938 states and 1317 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:09,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:11,479 INFO L93 Difference]: Finished difference Result 2411 states and 3394 transitions. [2021-12-22 14:30:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:30:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-22 14:30:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:11,488 INFO L225 Difference]: With dead ends: 2411 [2021-12-22 14:30:11,489 INFO L226 Difference]: Without dead ends: 1476 [2021-12-22 14:30:11,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:11,493 INFO L933 BasicCegarLoop]: 1429 mSDtfsCounter, 991 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 467 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:11,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1129 Valid, 2200 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 724 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-12-22 14:30:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-12-22 14:30:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1472. [2021-12-22 14:30:11,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1013 states have (on average 1.3455083909180652) internal successors, (1363), 1043 states have internal predecessors, (1363), 357 states have call successors, (357), 102 states have call predecessors, (357), 101 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2021-12-22 14:30:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2071 transitions. [2021-12-22 14:30:11,540 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2071 transitions. Word has length 25 [2021-12-22 14:30:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:11,540 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 2071 transitions. [2021-12-22 14:30:11,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2071 transitions. [2021-12-22 14:30:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 14:30:11,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:11,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:11,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:30:11,543 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:11,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:11,544 INFO L85 PathProgramCache]: Analyzing trace with hash 491627987, now seen corresponding path program 1 times [2021-12-22 14:30:11,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:11,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045942463] [2021-12-22 14:30:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:11,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:11,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:11,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045942463] [2021-12-22 14:30:11,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045942463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:11,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:11,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:30:11,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850608225] [2021-12-22 14:30:11,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:11,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:11,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:11,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:11,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:30:11,640 INFO L87 Difference]: Start difference. First operand 1472 states and 2071 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:30:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:11,740 INFO L93 Difference]: Finished difference Result 2967 states and 4179 transitions. [2021-12-22 14:30:11,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:11,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-22 14:30:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:11,749 INFO L225 Difference]: With dead ends: 2967 [2021-12-22 14:30:11,749 INFO L226 Difference]: Without dead ends: 1498 [2021-12-22 14:30:11,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:30:11,756 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 12 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:11,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1847 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 14:30:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-12-22 14:30:11,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1474. [2021-12-22 14:30:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1015 states have (on average 1.3448275862068966) internal successors, (1365), 1045 states have internal predecessors, (1365), 357 states have call successors, (357), 102 states have call predecessors, (357), 101 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2021-12-22 14:30:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2073 transitions. [2021-12-22 14:30:11,810 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2073 transitions. Word has length 24 [2021-12-22 14:30:11,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:11,811 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 2073 transitions. [2021-12-22 14:30:11,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:30:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2073 transitions. [2021-12-22 14:30:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 14:30:11,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:11,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:11,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:30:11,815 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:11,815 INFO L85 PathProgramCache]: Analyzing trace with hash 402915506, now seen corresponding path program 1 times [2021-12-22 14:30:11,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:11,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278489498] [2021-12-22 14:30:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:11,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:30:11,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:11,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278489498] [2021-12-22 14:30:11,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278489498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:11,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:11,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:30:11,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317724806] [2021-12-22 14:30:11,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:11,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:11,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:11,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:30:11,903 INFO L87 Difference]: Start difference. First operand 1474 states and 2073 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:30:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:11,974 INFO L93 Difference]: Finished difference Result 3380 states and 4835 transitions. [2021-12-22 14:30:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:11,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-22 14:30:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:11,983 INFO L225 Difference]: With dead ends: 3380 [2021-12-22 14:30:11,983 INFO L226 Difference]: Without dead ends: 1909 [2021-12-22 14:30:11,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:30:11,988 INFO L933 BasicCegarLoop]: 1277 mSDtfsCounter, 246 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:11,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 2249 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:30:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-12-22 14:30:12,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1486. [2021-12-22 14:30:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1027 states have (on average 1.3446932814021422) internal successors, (1381), 1057 states have internal predecessors, (1381), 357 states have call successors, (357), 102 states have call predecessors, (357), 101 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2021-12-22 14:30:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2089 transitions. [2021-12-22 14:30:12,042 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2089 transitions. Word has length 29 [2021-12-22 14:30:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:12,043 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 2089 transitions. [2021-12-22 14:30:12,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:30:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2089 transitions. [2021-12-22 14:30:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 14:30:12,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:12,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:12,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 14:30:12,045 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:12,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1038619191, now seen corresponding path program 1 times [2021-12-22 14:30:12,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:12,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287475409] [2021-12-22 14:30:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:12,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:12,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:30:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:12,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:12,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287475409] [2021-12-22 14:30:12,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287475409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:30:12,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207885327] [2021-12-22 14:30:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:12,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:30:12,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:30:12,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 14:30:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:12,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:30:12,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:30:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:30:12,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:30:12,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207885327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:12,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:30:12,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 14:30:12,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261182609] [2021-12-22 14:30:12,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:12,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:12,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:12,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:12,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:12,540 INFO L87 Difference]: Start difference. First operand 1486 states and 2089 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:12,613 INFO L93 Difference]: Finished difference Result 3436 states and 4919 transitions. [2021-12-22 14:30:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-22 14:30:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:12,622 INFO L225 Difference]: With dead ends: 3436 [2021-12-22 14:30:12,623 INFO L226 Difference]: Without dead ends: 1953 [2021-12-22 14:30:12,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:12,629 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 249 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:12,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 1937 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:30:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-12-22 14:30:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1532. [2021-12-22 14:30:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1061 states have (on average 1.3468426013195098) internal successors, (1429), 1091 states have internal predecessors, (1429), 369 states have call successors, (369), 102 states have call predecessors, (369), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-22 14:30:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 2161 transitions. [2021-12-22 14:30:12,688 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 2161 transitions. Word has length 35 [2021-12-22 14:30:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:12,688 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 2161 transitions. [2021-12-22 14:30:12,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 2161 transitions. [2021-12-22 14:30:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 14:30:12,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:12,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:12,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 14:30:12,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 14:30:12,903 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:12,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1739683769, now seen corresponding path program 1 times [2021-12-22 14:30:12,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:12,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108037037] [2021-12-22 14:30:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:12,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:12,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:30:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:12,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:12,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108037037] [2021-12-22 14:30:12,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108037037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:30:12,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960871952] [2021-12-22 14:30:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:12,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:12,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:30:12,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:30:12,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 14:30:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:13,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:30:13,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:30:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:30:13,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:30:13,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960871952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:13,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:30:13,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 14:30:13,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668791244] [2021-12-22 14:30:13,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:13,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:13,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:13,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:13,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:13,335 INFO L87 Difference]: Start difference. First operand 1532 states and 2161 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:13,419 INFO L93 Difference]: Finished difference Result 1554 states and 2187 transitions. [2021-12-22 14:30:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-22 14:30:13,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:13,427 INFO L225 Difference]: With dead ends: 1554 [2021-12-22 14:30:13,428 INFO L226 Difference]: Without dead ends: 1543 [2021-12-22 14:30:13,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:13,430 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 923 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:13,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 953 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:30:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-12-22 14:30:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1532. [2021-12-22 14:30:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1061 states have (on average 1.344957587181904) internal successors, (1427), 1091 states have internal predecessors, (1427), 369 states have call successors, (369), 102 states have call predecessors, (369), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-22 14:30:13,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 2159 transitions. [2021-12-22 14:30:13,480 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 2159 transitions. Word has length 35 [2021-12-22 14:30:13,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:13,481 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 2159 transitions. [2021-12-22 14:30:13,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:13,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 2159 transitions. [2021-12-22 14:30:13,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 14:30:13,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:13,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:13,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 14:30:13,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-22 14:30:13,687 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1796942071, now seen corresponding path program 1 times [2021-12-22 14:30:13,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:13,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290964717] [2021-12-22 14:30:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:13,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:13,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:30:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:13,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:13,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290964717] [2021-12-22 14:30:13,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290964717] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:30:13,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331385519] [2021-12-22 14:30:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:13,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:13,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:30:13,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:30:13,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 14:30:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:30:14,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:30:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:30:14,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:30:14,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331385519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:14,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:30:14,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 14:30:14,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415923281] [2021-12-22 14:30:14,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:14,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:14,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:14,159 INFO L87 Difference]: Start difference. First operand 1532 states and 2159 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:14,213 INFO L93 Difference]: Finished difference Result 1534 states and 2160 transitions. [2021-12-22 14:30:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:14,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-22 14:30:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:14,219 INFO L225 Difference]: With dead ends: 1534 [2021-12-22 14:30:14,219 INFO L226 Difference]: Without dead ends: 1531 [2021-12-22 14:30:14,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:14,220 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 894 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:14,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 925 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:30:14,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-12-22 14:30:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1531. [2021-12-22 14:30:14,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1061 states have (on average 1.3440150801131008) internal successors, (1426), 1090 states have internal predecessors, (1426), 368 states have call successors, (368), 102 states have call predecessors, (368), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-22 14:30:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 2157 transitions. [2021-12-22 14:30:14,262 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 2157 transitions. Word has length 35 [2021-12-22 14:30:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:14,263 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 2157 transitions. [2021-12-22 14:30:14,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 2157 transitions. [2021-12-22 14:30:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 14:30:14,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:14,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:14,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 14:30:14,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:14,486 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:14,486 INFO L85 PathProgramCache]: Analyzing trace with hash -129755051, now seen corresponding path program 1 times [2021-12-22 14:30:14,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:14,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415150414] [2021-12-22 14:30:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:14,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:14,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:30:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:14,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:14,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415150414] [2021-12-22 14:30:14,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415150414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:30:14,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868818176] [2021-12-22 14:30:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:14,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:14,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:30:14,571 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:30:14,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 14:30:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:14,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:30:14,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:30:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:30:14,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:30:14,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868818176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:14,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:30:14,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 14:30:14,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653920373] [2021-12-22 14:30:14,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:14,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:14,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:14,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:14,959 INFO L87 Difference]: Start difference. First operand 1531 states and 2157 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:14,998 INFO L93 Difference]: Finished difference Result 1533 states and 2158 transitions. [2021-12-22 14:30:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:15,018 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-22 14:30:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:15,025 INFO L225 Difference]: With dead ends: 1533 [2021-12-22 14:30:15,025 INFO L226 Difference]: Without dead ends: 1530 [2021-12-22 14:30:15,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:15,027 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 891 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:15,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 923 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:30:15,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-12-22 14:30:15,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1530. [2021-12-22 14:30:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1061 states have (on average 1.3430725730442978) internal successors, (1425), 1089 states have internal predecessors, (1425), 367 states have call successors, (367), 102 states have call predecessors, (367), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-22 14:30:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 2155 transitions. [2021-12-22 14:30:15,071 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 2155 transitions. Word has length 36 [2021-12-22 14:30:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:15,071 INFO L470 AbstractCegarLoop]: Abstraction has 1530 states and 2155 transitions. [2021-12-22 14:30:15,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 2155 transitions. [2021-12-22 14:30:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 14:30:15,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:15,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:15,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 14:30:15,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:15,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:15,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash 272181178, now seen corresponding path program 1 times [2021-12-22 14:30:15,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:15,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754973935] [2021-12-22 14:30:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:15,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:15,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:30:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:15,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:15,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754973935] [2021-12-22 14:30:15,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754973935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:30:15,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289947725] [2021-12-22 14:30:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:15,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:15,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:30:15,364 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:30:15,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 14:30:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:30:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:30:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:30:15,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:30:15,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289947725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:15,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:30:15,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 14:30:15,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934183594] [2021-12-22 14:30:15,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:15,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:15,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:15,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:15,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:15,724 INFO L87 Difference]: Start difference. First operand 1530 states and 2155 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:15,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:15,780 INFO L93 Difference]: Finished difference Result 1532 states and 2156 transitions. [2021-12-22 14:30:15,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:15,781 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-22 14:30:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:15,786 INFO L225 Difference]: With dead ends: 1532 [2021-12-22 14:30:15,786 INFO L226 Difference]: Without dead ends: 1529 [2021-12-22 14:30:15,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:15,787 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 888 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:15,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 921 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:30:15,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-12-22 14:30:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1529. [2021-12-22 14:30:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1061 states have (on average 1.342130065975495) internal successors, (1424), 1088 states have internal predecessors, (1424), 366 states have call successors, (366), 102 states have call predecessors, (366), 101 states have return successors, (363), 363 states have call predecessors, (363), 363 states have call successors, (363) [2021-12-22 14:30:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2153 transitions. [2021-12-22 14:30:15,830 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2153 transitions. Word has length 37 [2021-12-22 14:30:15,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:15,830 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 2153 transitions. [2021-12-22 14:30:15,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2153 transitions. [2021-12-22 14:30:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 14:30:15,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:15,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:15,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 14:30:16,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 14:30:16,052 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:16,053 INFO L85 PathProgramCache]: Analyzing trace with hash -152692744, now seen corresponding path program 1 times [2021-12-22 14:30:16,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:16,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290338793] [2021-12-22 14:30:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:16,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:16,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:30:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:16,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290338793] [2021-12-22 14:30:16,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290338793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:30:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430416955] [2021-12-22 14:30:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:16,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:16,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:30:16,109 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:30:16,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 14:30:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:16,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:30:16,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:30:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:30:16,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:30:16,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430416955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:16,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:30:16,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 14:30:16,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55533303] [2021-12-22 14:30:16,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:16,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:16,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:16,457 INFO L87 Difference]: Start difference. First operand 1529 states and 2153 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:16,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:16,527 INFO L93 Difference]: Finished difference Result 1953 states and 2700 transitions. [2021-12-22 14:30:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:16,527 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-12-22 14:30:16,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:16,534 INFO L225 Difference]: With dead ends: 1953 [2021-12-22 14:30:16,534 INFO L226 Difference]: Without dead ends: 1916 [2021-12-22 14:30:16,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:16,536 INFO L933 BasicCegarLoop]: 1046 mSDtfsCounter, 818 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:16,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 1423 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:30:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-12-22 14:30:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1916. [2021-12-22 14:30:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1300 states have (on average 1.32) internal successors, (1716), 1335 states have internal predecessors, (1716), 469 states have call successors, (469), 147 states have call predecessors, (469), 146 states have return successors, (468), 468 states have call predecessors, (468), 468 states have call successors, (468) [2021-12-22 14:30:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2653 transitions. [2021-12-22 14:30:16,594 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2653 transitions. Word has length 38 [2021-12-22 14:30:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:16,594 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2653 transitions. [2021-12-22 14:30:16,595 INFO L471 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:30:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2653 transitions. [2021-12-22 14:30:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 14:30:16,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:16,597 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:16,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 14:30:16,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:16,810 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:16,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:16,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1937560449, now seen corresponding path program 1 times [2021-12-22 14:30:16,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:16,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640025028] [2021-12-22 14:30:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:16,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:16,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:30:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:16,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 14:30:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:16,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 14:30:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:16,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 14:30:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:30:16,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:16,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640025028] [2021-12-22 14:30:16,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640025028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:30:16,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202683995] [2021-12-22 14:30:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:16,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:16,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:30:16,918 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:30:16,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 14:30:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:17,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 14:30:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:30:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:30:17,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:30:17,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202683995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:17,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:30:17,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 14:30:17,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815200708] [2021-12-22 14:30:17,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:17,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:30:17,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:17,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:30:17,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:30:17,331 INFO L87 Difference]: Start difference. First operand 1916 states and 2653 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 14:30:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:17,410 INFO L93 Difference]: Finished difference Result 3839 states and 5318 transitions. [2021-12-22 14:30:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:30:17,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2021-12-22 14:30:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:17,418 INFO L225 Difference]: With dead ends: 3839 [2021-12-22 14:30:17,418 INFO L226 Difference]: Without dead ends: 1926 [2021-12-22 14:30:17,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:30:17,425 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 9 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:17,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1752 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:30:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-12-22 14:30:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1918. [2021-12-22 14:30:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1302 states have (on average 1.3195084485407067) internal successors, (1718), 1337 states have internal predecessors, (1718), 469 states have call successors, (469), 147 states have call predecessors, (469), 146 states have return successors, (468), 468 states have call predecessors, (468), 468 states have call successors, (468) [2021-12-22 14:30:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2655 transitions. [2021-12-22 14:30:17,476 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2655 transitions. Word has length 65 [2021-12-22 14:30:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:17,476 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 2655 transitions. [2021-12-22 14:30:17,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 14:30:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2655 transitions. [2021-12-22 14:30:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 14:30:17,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:17,478 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:17,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 14:30:17,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:17,691 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:17,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash 175478772, now seen corresponding path program 1 times [2021-12-22 14:30:17,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:17,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633313579] [2021-12-22 14:30:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:17,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:17,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 14:30:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:17,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 14:30:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:17,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 14:30:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:17,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 14:30:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:30:17,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:17,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633313579] [2021-12-22 14:30:17,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633313579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:30:17,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834917588] [2021-12-22 14:30:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:17,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:30:17,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:30:17,766 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:30:17,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 14:30:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:18,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:30:18,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:30:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:30:18,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:30:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 14:30:18,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834917588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:30:18,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 14:30:18,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-22 14:30:18,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998457172] [2021-12-22 14:30:18,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 14:30:18,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 14:30:18,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:18,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 14:30:18,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:30:18,381 INFO L87 Difference]: Start difference. First operand 1918 states and 2655 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-22 14:30:22,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:24,869 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:26,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:28,740 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:29,684 INFO L93 Difference]: Finished difference Result 3991 states and 5547 transitions. [2021-12-22 14:30:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:30:29,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 69 [2021-12-22 14:30:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:29,693 INFO L225 Difference]: With dead ends: 3991 [2021-12-22 14:30:29,693 INFO L226 Difference]: Without dead ends: 2076 [2021-12-22 14:30:29,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:30:29,698 INFO L933 BasicCegarLoop]: 789 mSDtfsCounter, 391 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 169 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 2372 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:29,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 2372 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1503 Invalid, 3 Unknown, 0 Unchecked, 11.2s Time] [2021-12-22 14:30:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-12-22 14:30:29,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 2076. [2021-12-22 14:30:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 1430 states have (on average 1.3146853146853146) internal successors, (1880), 1465 states have internal predecessors, (1880), 499 states have call successors, (499), 147 states have call predecessors, (499), 146 states have return successors, (498), 498 states have call predecessors, (498), 498 states have call successors, (498) [2021-12-22 14:30:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 2877 transitions. [2021-12-22 14:30:29,780 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 2877 transitions. Word has length 69 [2021-12-22 14:30:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:29,780 INFO L470 AbstractCegarLoop]: Abstraction has 2076 states and 2877 transitions. [2021-12-22 14:30:29,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-22 14:30:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 2877 transitions. [2021-12-22 14:30:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 14:30:29,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:29,783 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:29,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 14:30:30,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 14:30:30,003 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:30,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:30,003 INFO L85 PathProgramCache]: Analyzing trace with hash -834193707, now seen corresponding path program 2 times [2021-12-22 14:30:30,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:30,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160612165] [2021-12-22 14:30:30,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:30,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:30,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 14:30:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:30,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 14:30:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:30,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 14:30:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:30,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-22 14:30:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 14:30:30,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:30,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160612165] [2021-12-22 14:30:30,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160612165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:30,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:30,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:30:30,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677702568] [2021-12-22 14:30:30,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:30,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:30:30,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:30:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:30:30,146 INFO L87 Difference]: Start difference. First operand 2076 states and 2877 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 14:30:33,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:35,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:38,122 INFO L93 Difference]: Finished difference Result 4521 states and 6345 transitions. [2021-12-22 14:30:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:30:38,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 84 [2021-12-22 14:30:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:38,133 INFO L225 Difference]: With dead ends: 4521 [2021-12-22 14:30:38,133 INFO L226 Difference]: Without dead ends: 2448 [2021-12-22 14:30:38,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:30:38,139 INFO L933 BasicCegarLoop]: 1048 mSDtfsCounter, 700 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 247 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:38,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 2465 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1063 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2021-12-22 14:30:38,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-12-22 14:30:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2080. [2021-12-22 14:30:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1434 states have (on average 1.3138075313807531) internal successors, (1884), 1469 states have internal predecessors, (1884), 499 states have call successors, (499), 147 states have call predecessors, (499), 146 states have return successors, (498), 498 states have call predecessors, (498), 498 states have call successors, (498) [2021-12-22 14:30:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2881 transitions. [2021-12-22 14:30:38,211 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2881 transitions. Word has length 84 [2021-12-22 14:30:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:38,211 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 2881 transitions. [2021-12-22 14:30:38,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 14:30:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2881 transitions. [2021-12-22 14:30:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-22 14:30:38,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:38,214 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2021-12-22 14:30:38,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 14:30:38,214 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:38,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2145382468, now seen corresponding path program 1 times [2021-12-22 14:30:38,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:38,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380333404] [2021-12-22 14:30:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:38,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:38,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 14:30:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:38,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 14:30:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:38,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 14:30:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:38,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 14:30:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:38,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:30:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-22 14:30:38,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:38,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380333404] [2021-12-22 14:30:38,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380333404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:38,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:38,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:30:38,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883894230] [2021-12-22 14:30:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:38,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:30:38,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:38,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:30:38,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:30:38,364 INFO L87 Difference]: Start difference. First operand 2080 states and 2881 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 14:30:45,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:47,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:30:49,379 INFO L93 Difference]: Finished difference Result 4651 states and 6557 transitions. [2021-12-22 14:30:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 14:30:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 94 [2021-12-22 14:30:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:30:49,390 INFO L225 Difference]: With dead ends: 4651 [2021-12-22 14:30:49,390 INFO L226 Difference]: Without dead ends: 2574 [2021-12-22 14:30:49,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:30:49,395 INFO L933 BasicCegarLoop]: 1079 mSDtfsCounter, 729 mSDsluCounter, 2849 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 423 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 3928 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-12-22 14:30:49,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 3928 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1959 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2021-12-22 14:30:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-12-22 14:30:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2092. [2021-12-22 14:30:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 1444 states have (on average 1.311634349030471) internal successors, (1894), 1477 states have internal predecessors, (1894), 499 states have call successors, (499), 147 states have call predecessors, (499), 148 states have return successors, (516), 502 states have call predecessors, (516), 498 states have call successors, (516) [2021-12-22 14:30:49,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2909 transitions. [2021-12-22 14:30:49,471 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2909 transitions. Word has length 94 [2021-12-22 14:30:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:30:49,471 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 2909 transitions. [2021-12-22 14:30:49,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 14:30:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2909 transitions. [2021-12-22 14:30:49,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-22 14:30:49,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:30:49,474 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:30:49,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 14:30:49,474 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:30:49,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:30:49,474 INFO L85 PathProgramCache]: Analyzing trace with hash 923753966, now seen corresponding path program 1 times [2021-12-22 14:30:49,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:30:49,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904738100] [2021-12-22 14:30:49,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:30:49,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:30:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:49,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 14:30:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:49,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 14:30:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:49,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 14:30:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:49,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 14:30:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:49,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 14:30:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:30:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 14:30:49,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:30:49,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904738100] [2021-12-22 14:30:49,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904738100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:30:49,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:30:49,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:30:49,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916226163] [2021-12-22 14:30:49,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:30:49,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:30:49,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:30:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:30:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:30:49,605 INFO L87 Difference]: Start difference. First operand 2092 states and 2909 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 14:30:51,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:30:59,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:31:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:31:00,063 INFO L93 Difference]: Finished difference Result 4873 states and 6897 transitions. [2021-12-22 14:31:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:31:00,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 94 [2021-12-22 14:31:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:31:00,074 INFO L225 Difference]: With dead ends: 4873 [2021-12-22 14:31:00,074 INFO L226 Difference]: Without dead ends: 2784 [2021-12-22 14:31:00,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-22 14:31:00,079 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 748 mSDsluCounter, 2640 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 461 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 3664 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:31:00,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 3664 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 1968 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2021-12-22 14:31:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-12-22 14:31:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2120. [2021-12-22 14:31:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 1472 states have (on average 1.3057065217391304) internal successors, (1922), 1491 states have internal predecessors, (1922), 499 states have call successors, (499), 147 states have call predecessors, (499), 148 states have return successors, (516), 516 states have call predecessors, (516), 498 states have call successors, (516) [2021-12-22 14:31:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 2937 transitions. [2021-12-22 14:31:00,159 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 2937 transitions. Word has length 94 [2021-12-22 14:31:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:31:00,159 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 2937 transitions. [2021-12-22 14:31:00,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 14:31:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 2937 transitions. [2021-12-22 14:31:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-22 14:31:00,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:31:00,163 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:31:00,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 14:31:00,163 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:31:00,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:31:00,164 INFO L85 PathProgramCache]: Analyzing trace with hash -651205810, now seen corresponding path program 1 times [2021-12-22 14:31:00,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:31:00,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722586728] [2021-12-22 14:31:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:31:00,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:31:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 14:31:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 14:31:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:31:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:31:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 14:31:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 14:31:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 14:31:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 14:31:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 14:31:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:31:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:31:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:31:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:31:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 14:31:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 14:31:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 14:31:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:31:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:31:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 14:31:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 14:31:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-22 14:31:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-22 14:31:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-22 14:31:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:31:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-22 14:31:00,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:31:00,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722586728] [2021-12-22 14:31:00,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722586728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:31:00,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:31:00,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:31:00,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040696116] [2021-12-22 14:31:00,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:31:00,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:31:00,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:31:00,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:31:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:31:00,582 INFO L87 Difference]: Start difference. First operand 2120 states and 2937 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 4 states have internal predecessors, (119), 2 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-22 14:31:02,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []