./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c36dfa3b 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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-c36dfa3 [2021-11-04 04:11:19,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-04 04:11:19,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-04 04:11:19,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-04 04:11:19,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-04 04:11:19,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-04 04:11:19,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-04 04:11:19,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-04 04:11:19,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-04 04:11:19,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-04 04:11:19,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-04 04:11:19,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-04 04:11:19,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-04 04:11:19,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-04 04:11:19,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-04 04:11:19,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-04 04:11:19,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-04 04:11:19,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-04 04:11:19,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-04 04:11:19,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-04 04:11:19,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-04 04:11:19,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-04 04:11:19,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-04 04:11:19,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-04 04:11:19,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-04 04:11:19,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-04 04:11:19,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-04 04:11:19,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-04 04:11:19,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-04 04:11:19,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-04 04:11:19,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-04 04:11:19,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-04 04:11:19,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-04 04:11:19,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-04 04:11:19,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-04 04:11:19,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-04 04:11:19,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-04 04:11:19,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-04 04:11:19,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-04 04:11:19,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-04 04:11:19,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-04 04:11:19,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-04 04:11:19,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-04 04:11:19,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-04 04:11:19,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-04 04:11:19,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-04 04:11:19,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-04 04:11:19,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-04 04:11:19,576 INFO L138 SettingsManager]: * Use SBE=true [2021-11-04 04:11:19,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-04 04:11:19,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-04 04:11:19,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-04 04:11:19,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-04 04:11:19,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-04 04:11:19,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-04 04:11:19,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-04 04:11:19,578 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-04 04:11:19,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-04 04:11:19,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-04 04:11:19,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-04 04:11:19,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-04 04:11:19,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-04 04:11:19,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-04 04:11:19,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-04 04:11:19,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-04 04:11:19,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-04 04:11:19,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-04 04:11:19,580 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-04 04:11:19,580 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-04 04:11:19,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-04 04:11:19,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-04 04:11:19,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-04 04:11:19,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-04 04:11:19,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-04 04:11:19,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-04 04:11:19,746 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-04 04:11:19,747 INFO L275 PluginConnector]: CDTParser initialized [2021-11-04 04:11:19,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-04 04:11:19,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb01dd148/6ba10ff756ee477da470927f57ddb421/FLAG5c273d8da [2021-11-04 04:11:20,342 INFO L306 CDTParser]: Found 1 translation units. [2021-11-04 04:11:20,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-04 04:11:20,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb01dd148/6ba10ff756ee477da470927f57ddb421/FLAG5c273d8da [2021-11-04 04:11:20,576 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb01dd148/6ba10ff756ee477da470927f57ddb421 [2021-11-04 04:11:20,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-04 04:11:20,579 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-04 04:11:20,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-04 04:11:20,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-04 04:11:20,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-04 04:11:20,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 04:11:20" (1/1) ... [2021-11-04 04:11:20,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3799e7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:20, skipping insertion in model container [2021-11-04 04:11:20,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 04:11:20" (1/1) ... [2021-11-04 04:11:20,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-04 04:11:20,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-04 04:11:21,284 WARN L228 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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-04 04:11:21,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-04 04:11:21,613 INFO L203 MainTranslator]: Completed pre-run [2021-11-04 04:11:21,704 WARN L228 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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-04 04:11:21,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-04 04:11:21,865 INFO L208 MainTranslator]: Completed translation [2021-11-04 04:11:21,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21 WrapperNode [2021-11-04 04:11:21,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-04 04:11:21,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-04 04:11:21,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-04 04:11:21,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-04 04:11:21,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21" (1/1) ... [2021-11-04 04:11:21,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21" (1/1) ... [2021-11-04 04:11:22,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-04 04:11:22,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-04 04:11:22,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-04 04:11:22,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-04 04:11:22,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21" (1/1) ... [2021-11-04 04:11:22,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21" (1/1) ... [2021-11-04 04:11:22,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21" (1/1) ... [2021-11-04 04:11:22,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21" (1/1) ... [2021-11-04 04:11:22,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21" (1/1) ... [2021-11-04 04:11:22,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21" (1/1) ... [2021-11-04 04:11:22,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21" (1/1) ... [2021-11-04 04:11:22,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-04 04:11:22,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-04 04:11:22,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-04 04:11:22,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-04 04:11:22,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21" (1/1) ... [2021-11-04 04:11:22,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-04 04:11:22,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 04:11:22,271 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) [2021-11-04 04:11:22,288 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 [2021-11-04 04:11:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-04 04:11:22,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-04 04:11:22,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-04 04:11:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-04 04:11:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-04 04:11:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-04 04:11:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-04 04:11:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-04 04:11:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-04 04:11:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-04 04:11:22,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-04 04:11:22,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-04 04:11:22,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-04 04:11:22,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-04 04:11:22,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-04 04:11:23,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-04 04:11:23,482 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2021-11-04 04:11:23,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 04:11:23 BoogieIcfgContainer [2021-11-04 04:11:23,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-04 04:11:23,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-04 04:11:23,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-04 04:11:23,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-04 04:11:23,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 04:11:20" (1/3) ... [2021-11-04 04:11:23,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bf22b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 04:11:23, skipping insertion in model container [2021-11-04 04:11:23,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:11:21" (2/3) ... [2021-11-04 04:11:23,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bf22b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 04:11:23, skipping insertion in model container [2021-11-04 04:11:23,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 04:11:23" (3/3) ... [2021-11-04 04:11:23,491 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-04 04:11:23,495 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-04 04:11:23,495 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-04 04:11:23,542 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-04 04:11:23,549 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 [2021-11-04 04:11:23,549 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-04 04:11:23,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-04 04:11:23,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:11:23,588 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] [2021-11-04 04:11:23,589 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:11:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:11:23,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2021-11-04 04:11:23,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:11:23,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809468453] [2021-11-04 04:11:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:11:23,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:11:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:11:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:11:23,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:11:23,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809468453] [2021-11-04 04:11:23,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809468453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:11:23,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:11:23,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 04:11:23,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371383759] [2021-11-04 04:11:23,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:11:23,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 04:11:23,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:11:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 04:11:23,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:11:23,949 INFO L87 Difference]: Start difference. First operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:26,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:11:28,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:11:28,287 INFO L93 Difference]: Finished difference Result 2601 states and 3987 transitions. [2021-11-04 04:11:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 04:11:28,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-04 04:11:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:11:28,312 INFO L225 Difference]: With dead ends: 2601 [2021-11-04 04:11:28,314 INFO L226 Difference]: Without dead ends: 1696 [2021-11-04 04:11:28,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.06ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:11:28,329 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1196 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 2588 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3708.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.26ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4178.81ms IncrementalHoareTripleChecker+Time [2021-11-04 04:11:28,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 8 Invalid, 2592 Unknown, 0 Unchecked, 10.26ms Time], IncrementalHoareTripleChecker [3 Valid, 2588 Invalid, 1 Unknown, 0 Unchecked, 4178.81ms Time] [2021-11-04 04:11:28,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-11-04 04:11:28,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1686. [2021-11-04 04:11:28,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 1.4658753709198813) internal successors, (2470), 1685 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2470 transitions. [2021-11-04 04:11:28,413 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2470 transitions. Word has length 36 [2021-11-04 04:11:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:11:28,414 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 2470 transitions. [2021-11-04 04:11:28,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2470 transitions. [2021-11-04 04:11:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-04 04:11:28,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:11:28,416 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, 1, 1] [2021-11-04 04:11:28,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-04 04:11:28,417 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:11:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:11:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2021-11-04 04:11:28,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:11:28,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548566793] [2021-11-04 04:11:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:11:28,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:11:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:11:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:11:28,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:11:28,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548566793] [2021-11-04 04:11:28,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548566793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:11:28,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:11:28,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-04 04:11:28,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279025756] [2021-11-04 04:11:28,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:11:28,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-04 04:11:28,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:11:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-04 04:11:28,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-04 04:11:28,504 INFO L87 Difference]: Start difference. First operand 1686 states and 2470 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:31,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:11:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:11:33,438 INFO L93 Difference]: Finished difference Result 4943 states and 7275 transitions. [2021-11-04 04:11:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-04 04:11:33,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-04 04:11:33,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:11:33,451 INFO L225 Difference]: With dead ends: 4943 [2021-11-04 04:11:33,452 INFO L226 Difference]: Without dead ends: 3304 [2021-11-04 04:11:33,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.65ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-04 04:11:33,455 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1251 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 5100 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4250.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.05ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4784.42ms IncrementalHoareTripleChecker+Time [2021-11-04 04:11:33,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 0 Invalid, 5103 Unknown, 0 Unchecked, 11.05ms Time], IncrementalHoareTripleChecker [2 Valid, 5100 Invalid, 1 Unknown, 0 Unchecked, 4784.42ms Time] [2021-11-04 04:11:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-11-04 04:11:33,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 3198. [2021-11-04 04:11:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 3197 states have (on average 1.4782608695652173) internal successors, (4726), 3197 states have internal predecessors, (4726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 4726 transitions. [2021-11-04 04:11:33,523 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 4726 transitions. Word has length 40 [2021-11-04 04:11:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:11:33,524 INFO L470 AbstractCegarLoop]: Abstraction has 3198 states and 4726 transitions. [2021-11-04 04:11:33,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 4726 transitions. [2021-11-04 04:11:33,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-04 04:11:33,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:11:33,534 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] [2021-11-04 04:11:33,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-04 04:11:33,535 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:11:33,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:11:33,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1564766953, now seen corresponding path program 1 times [2021-11-04 04:11:33,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:11:33,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221091656] [2021-11-04 04:11:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:11:33,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:11:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:11:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:11:33,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:11:33,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221091656] [2021-11-04 04:11:33,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221091656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:11:33,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:11:33,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 04:11:33,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100698251] [2021-11-04 04:11:33,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:11:33,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 04:11:33,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:11:33,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 04:11:33,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:11:33,632 INFO L87 Difference]: Start difference. First operand 3198 states and 4726 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:36,724 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:11:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:11:37,444 INFO L93 Difference]: Finished difference Result 7807 states and 11573 transitions. [2021-11-04 04:11:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 04:11:37,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-04 04:11:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:11:37,471 INFO L225 Difference]: With dead ends: 7807 [2021-11-04 04:11:37,472 INFO L226 Difference]: Without dead ends: 4662 [2021-11-04 04:11:37,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.42ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:11:37,477 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 629 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3286.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3677.58ms IncrementalHoareTripleChecker+Time [2021-11-04 04:11:37,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 0 Invalid, 2526 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [2 Valid, 2523 Invalid, 1 Unknown, 0 Unchecked, 3677.58ms Time] [2021-11-04 04:11:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2021-11-04 04:11:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 4642. [2021-11-04 04:11:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 1.4833010127127775) internal successors, (6884), 4641 states have internal predecessors, (6884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 6884 transitions. [2021-11-04 04:11:37,553 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 6884 transitions. Word has length 69 [2021-11-04 04:11:37,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:11:37,553 INFO L470 AbstractCegarLoop]: Abstraction has 4642 states and 6884 transitions. [2021-11-04 04:11:37,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 6884 transitions. [2021-11-04 04:11:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-04 04:11:37,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:11:37,557 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-04 04:11:37,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-04 04:11:37,557 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:11:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:11:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash 36804616, now seen corresponding path program 1 times [2021-11-04 04:11:37,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:11:37,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3553558] [2021-11-04 04:11:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:11:37,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:11:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:11:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:11:37,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:11:37,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3553558] [2021-11-04 04:11:37,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3553558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:11:37,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:11:37,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 04:11:37,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136331731] [2021-11-04 04:11:37,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:11:37,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 04:11:37,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:11:37,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 04:11:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:11:37,620 INFO L87 Difference]: Start difference. First operand 4642 states and 6884 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:40,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:11:41,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:11:41,706 INFO L93 Difference]: Finished difference Result 11045 states and 16385 transitions. [2021-11-04 04:11:41,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 04:11:41,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-04 04:11:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:11:41,724 INFO L225 Difference]: With dead ends: 11045 [2021-11-04 04:11:41,724 INFO L226 Difference]: Without dead ends: 6456 [2021-11-04 04:11:41,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.39ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:11:41,730 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 738 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 3170 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3529.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.21ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3924.09ms IncrementalHoareTripleChecker+Time [2021-11-04 04:11:41,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 0 Invalid, 3173 Unknown, 0 Unchecked, 3.21ms Time], IncrementalHoareTripleChecker [2 Valid, 3170 Invalid, 1 Unknown, 0 Unchecked, 3924.09ms Time] [2021-11-04 04:11:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2021-11-04 04:11:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 6438. [2021-11-04 04:11:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 6437 states have (on average 1.4817461550411684) internal successors, (9538), 6437 states have internal predecessors, (9538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 9538 transitions. [2021-11-04 04:11:41,850 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 9538 transitions. Word has length 75 [2021-11-04 04:11:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:11:41,850 INFO L470 AbstractCegarLoop]: Abstraction has 6438 states and 9538 transitions. [2021-11-04 04:11:41,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 9538 transitions. [2021-11-04 04:11:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-04 04:11:41,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:11:41,855 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:11:41,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-04 04:11:41,856 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:11:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:11:41,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2021-11-04 04:11:41,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:11:41,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583600572] [2021-11-04 04:11:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:11:41,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:11:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:11:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:11:41,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:11:41,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583600572] [2021-11-04 04:11:41,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583600572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:11:41,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:11:41,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 04:11:41,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210522379] [2021-11-04 04:11:41,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:11:41,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 04:11:41,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:11:41,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 04:11:41,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:11:41,954 INFO L87 Difference]: Start difference. First operand 6438 states and 9538 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:44,567 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:11:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:11:45,784 INFO L93 Difference]: Finished difference Result 14546 states and 21659 transitions. [2021-11-04 04:11:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 04:11:45,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-04 04:11:45,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:11:45,811 INFO L225 Difference]: With dead ends: 14546 [2021-11-04 04:11:45,811 INFO L226 Difference]: Without dead ends: 8161 [2021-11-04 04:11:45,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.39ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:11:45,819 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 754 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3322.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.63ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3642.40ms IncrementalHoareTripleChecker+Time [2021-11-04 04:11:45,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 0 Invalid, 2466 Unknown, 0 Unchecked, 2.63ms Time], IncrementalHoareTripleChecker [20 Valid, 2445 Invalid, 1 Unknown, 0 Unchecked, 3642.40ms Time] [2021-11-04 04:11:45,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8161 states. [2021-11-04 04:11:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8161 to 8141. [2021-11-04 04:11:45,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8141 states, 8140 states have (on average 1.4813267813267814) internal successors, (12058), 8140 states have internal predecessors, (12058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8141 states to 8141 states and 12058 transitions. [2021-11-04 04:11:45,934 INFO L78 Accepts]: Start accepts. Automaton has 8141 states and 12058 transitions. Word has length 83 [2021-11-04 04:11:45,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:11:45,935 INFO L470 AbstractCegarLoop]: Abstraction has 8141 states and 12058 transitions. [2021-11-04 04:11:45,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:45,935 INFO L276 IsEmpty]: Start isEmpty. Operand 8141 states and 12058 transitions. [2021-11-04 04:11:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-04 04:11:45,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:11:45,939 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:11:45,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-04 04:11:45,940 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:11:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:11:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2021-11-04 04:11:45,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:11:45,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117514385] [2021-11-04 04:11:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:11:45,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:11:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:11:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:11:45,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:11:45,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117514385] [2021-11-04 04:11:45,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117514385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:11:45,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:11:45,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 04:11:45,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203166106] [2021-11-04 04:11:45,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:11:45,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 04:11:45,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:11:45,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 04:11:45,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:11:45,984 INFO L87 Difference]: Start difference. First operand 8141 states and 12058 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:48,651 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:11:50,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:11:50,606 INFO L93 Difference]: Finished difference Result 19629 states and 29162 transitions. [2021-11-04 04:11:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 04:11:50,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-04 04:11:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:11:50,637 INFO L225 Difference]: With dead ends: 19629 [2021-11-04 04:11:50,637 INFO L226 Difference]: Without dead ends: 15459 [2021-11-04 04:11:50,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.58ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:11:50,646 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1121 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 3530 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3820.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.89ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3530 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4378.30ms IncrementalHoareTripleChecker+Time [2021-11-04 04:11:50,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 0 Invalid, 3568 Unknown, 0 Unchecked, 5.89ms Time], IncrementalHoareTripleChecker [37 Valid, 3530 Invalid, 1 Unknown, 0 Unchecked, 4378.30ms Time] [2021-11-04 04:11:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15459 states. [2021-11-04 04:11:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15459 to 8253. [2021-11-04 04:11:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8253 states, 8252 states have (on average 1.4747939893359185) internal successors, (12170), 8252 states have internal predecessors, (12170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8253 states to 8253 states and 12170 transitions. [2021-11-04 04:11:50,836 INFO L78 Accepts]: Start accepts. Automaton has 8253 states and 12170 transitions. Word has length 84 [2021-11-04 04:11:50,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:11:50,837 INFO L470 AbstractCegarLoop]: Abstraction has 8253 states and 12170 transitions. [2021-11-04 04:11:50,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:50,838 INFO L276 IsEmpty]: Start isEmpty. Operand 8253 states and 12170 transitions. [2021-11-04 04:11:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-04 04:11:50,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:11:50,849 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:11:50,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-04 04:11:50,850 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:11:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:11:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2021-11-04 04:11:50,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:11:50,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368883743] [2021-11-04 04:11:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:11:50,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:11:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:11:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:11:50,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:11:50,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368883743] [2021-11-04 04:11:50,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368883743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:11:50,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:11:50,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 04:11:50,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269131211] [2021-11-04 04:11:50,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:11:50,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 04:11:50,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:11:50,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 04:11:50,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-04 04:11:50,961 INFO L87 Difference]: Start difference. First operand 8253 states and 12170 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:53,647 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:11:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:11:56,452 INFO L93 Difference]: Finished difference Result 19855 states and 29315 transitions. [2021-11-04 04:11:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 04:11:56,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-04 04:11:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:11:56,474 INFO L225 Difference]: With dead ends: 19855 [2021-11-04 04:11:56,474 INFO L226 Difference]: Without dead ends: 11655 [2021-11-04 04:11:56,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.72ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-04 04:11:56,488 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2190 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 4638 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4572.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2190 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.36ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4638 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5200.92ms IncrementalHoareTripleChecker+Time [2021-11-04 04:11:56,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2190 Valid, 0 Invalid, 4662 Unknown, 0 Unchecked, 8.36ms Time], IncrementalHoareTripleChecker [23 Valid, 4638 Invalid, 1 Unknown, 0 Unchecked, 5200.92ms Time] [2021-11-04 04:11:56,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11655 states. [2021-11-04 04:11:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11655 to 8085. [2021-11-04 04:11:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8085 states, 8084 states have (on average 1.4638792676892627) internal successors, (11834), 8084 states have internal predecessors, (11834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 11834 transitions. [2021-11-04 04:11:56,723 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 11834 transitions. Word has length 86 [2021-11-04 04:11:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:11:56,724 INFO L470 AbstractCegarLoop]: Abstraction has 8085 states and 11834 transitions. [2021-11-04 04:11:56,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:11:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 11834 transitions. [2021-11-04 04:11:56,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-04 04:11:56,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:11:56,732 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:11:56,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-04 04:11:56,733 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:11:56,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:11:56,734 INFO L85 PathProgramCache]: Analyzing trace with hash 115550791, now seen corresponding path program 1 times [2021-11-04 04:11:56,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:11:56,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183929423] [2021-11-04 04:11:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:11:56,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:11:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:11:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:11:56,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:11:56,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183929423] [2021-11-04 04:11:56,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183929423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-04 04:11:56,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954652047] [2021-11-04 04:11:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:11:56,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 04:11:56,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 04:11:56,840 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) [2021-11-04 04:11:56,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-04 04:11:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:11:57,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 04:11:57,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:11:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:11:57,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-04 04:11:57,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954652047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:11:57,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-04 04:11:57,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-04 04:11:57,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657613953] [2021-11-04 04:11:57,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:11:57,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 04:11:57,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:11:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 04:11:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 04:11:57,370 INFO L87 Difference]: Start difference. First operand 8085 states and 11834 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:00,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:12:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:12:02,275 INFO L93 Difference]: Finished difference Result 17728 states and 25982 transitions. [2021-11-04 04:12:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 04:12:02,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-04 04:12:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:12:02,305 INFO L225 Difference]: With dead ends: 17728 [2021-11-04 04:12:02,305 INFO L226 Difference]: Without dead ends: 17720 [2021-11-04 04:12:02,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.29ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 04:12:02,312 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2443 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 4497 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4218.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2443 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.17ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 4497 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4677.41ms IncrementalHoareTripleChecker+Time [2021-11-04 04:12:02,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2443 Valid, 0 Invalid, 4502 Unknown, 0 Unchecked, 5.17ms Time], IncrementalHoareTripleChecker [4 Valid, 4497 Invalid, 1 Unknown, 0 Unchecked, 4677.41ms Time] [2021-11-04 04:12:02,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17720 states. [2021-11-04 04:12:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17720 to 16377. [2021-11-04 04:12:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16377 states, 16376 states have (on average 1.4692232535417684) internal successors, (24060), 16376 states have internal predecessors, (24060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16377 states to 16377 states and 24060 transitions. [2021-11-04 04:12:02,637 INFO L78 Accepts]: Start accepts. Automaton has 16377 states and 24060 transitions. Word has length 89 [2021-11-04 04:12:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:12:02,638 INFO L470 AbstractCegarLoop]: Abstraction has 16377 states and 24060 transitions. [2021-11-04 04:12:02,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 16377 states and 24060 transitions. [2021-11-04 04:12:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-04 04:12:02,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:12:02,644 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:12:02,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-04 04:12:02,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 04:12:02,866 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:12:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:12:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash -895566459, now seen corresponding path program 1 times [2021-11-04 04:12:02,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:12:02,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215054086] [2021-11-04 04:12:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:12:02,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:12:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:12:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:12:02,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:12:02,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215054086] [2021-11-04 04:12:02,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215054086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:12:02,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:12:02,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 04:12:02,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486667393] [2021-11-04 04:12:02,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:12:02,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 04:12:02,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:12:02,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 04:12:02,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 04:12:02,965 INFO L87 Difference]: Start difference. First operand 16377 states and 24060 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:05,625 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:12:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:12:08,690 INFO L93 Difference]: Finished difference Result 46501 states and 68341 transitions. [2021-11-04 04:12:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-04 04:12:08,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-04 04:12:08,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:12:08,758 INFO L225 Difference]: With dead ends: 46501 [2021-11-04 04:12:08,758 INFO L226 Difference]: Without dead ends: 33983 [2021-11-04 04:12:08,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.00ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 04:12:08,775 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2604 mSDsluCounter, 2518 mSDsCounter, 0 mSdLazyCounter, 4889 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4516.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2604 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.09ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4889 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5082.77ms IncrementalHoareTripleChecker+Time [2021-11-04 04:12:08,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2604 Valid, 0 Invalid, 4892 Unknown, 0 Unchecked, 25.09ms Time], IncrementalHoareTripleChecker [2 Valid, 4889 Invalid, 1 Unknown, 0 Unchecked, 5082.77ms Time] [2021-11-04 04:12:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33983 states. [2021-11-04 04:12:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33983 to 16381. [2021-11-04 04:12:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16381 states, 16380 states have (on average 1.4691086691086692) internal successors, (24064), 16380 states have internal predecessors, (24064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16381 states to 16381 states and 24064 transitions. [2021-11-04 04:12:09,270 INFO L78 Accepts]: Start accepts. Automaton has 16381 states and 24064 transitions. Word has length 89 [2021-11-04 04:12:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:12:09,270 INFO L470 AbstractCegarLoop]: Abstraction has 16381 states and 24064 transitions. [2021-11-04 04:12:09,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 16381 states and 24064 transitions. [2021-11-04 04:12:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-04 04:12:09,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:12:09,276 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:12:09,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-04 04:12:09,276 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:12:09,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:12:09,276 INFO L85 PathProgramCache]: Analyzing trace with hash 666379044, now seen corresponding path program 1 times [2021-11-04 04:12:09,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:12:09,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234558488] [2021-11-04 04:12:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:12:09,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:12:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:12:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-04 04:12:09,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:12:09,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234558488] [2021-11-04 04:12:09,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234558488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:12:09,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:12:09,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-04 04:12:09,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848831134] [2021-11-04 04:12:09,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:12:09,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-04 04:12:09,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:12:09,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-04 04:12:09,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-04 04:12:09,396 INFO L87 Difference]: Start difference. First operand 16381 states and 24064 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:12,429 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:12:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:12:14,977 INFO L93 Difference]: Finished difference Result 41423 states and 60957 transitions. [2021-11-04 04:12:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-04 04:12:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-04 04:12:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:12:15,052 INFO L225 Difference]: With dead ends: 41423 [2021-11-04 04:12:15,067 INFO L226 Difference]: Without dead ends: 28895 [2021-11-04 04:12:15,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.44ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-04 04:12:15,096 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1214 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 5100 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4495.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.38ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5024.85ms IncrementalHoareTripleChecker+Time [2021-11-04 04:12:15,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 0 Invalid, 5103 Unknown, 0 Unchecked, 7.38ms Time], IncrementalHoareTripleChecker [2 Valid, 5100 Invalid, 1 Unknown, 0 Unchecked, 5024.85ms Time] [2021-11-04 04:12:15,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28895 states. [2021-11-04 04:12:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28895 to 28251. [2021-11-04 04:12:15,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28251 states, 28250 states have (on average 1.4744778761061947) internal successors, (41654), 28250 states have internal predecessors, (41654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28251 states to 28251 states and 41654 transitions. [2021-11-04 04:12:15,731 INFO L78 Accepts]: Start accepts. Automaton has 28251 states and 41654 transitions. Word has length 91 [2021-11-04 04:12:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:12:15,731 INFO L470 AbstractCegarLoop]: Abstraction has 28251 states and 41654 transitions. [2021-11-04 04:12:15,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 28251 states and 41654 transitions. [2021-11-04 04:12:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-04 04:12:15,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:12:15,750 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:12:15,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-04 04:12:15,750 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:12:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:12:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash 405018673, now seen corresponding path program 1 times [2021-11-04 04:12:15,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:12:15,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654151485] [2021-11-04 04:12:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:12:15,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:12:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:12:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-04 04:12:15,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:12:15,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654151485] [2021-11-04 04:12:15,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654151485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:12:15,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:12:15,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 04:12:15,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053753370] [2021-11-04 04:12:15,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:12:15,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 04:12:15,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:12:15,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 04:12:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-04 04:12:15,838 INFO L87 Difference]: Start difference. First operand 28251 states and 41654 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:18,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:12:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:12:21,759 INFO L93 Difference]: Finished difference Result 66351 states and 98063 transitions. [2021-11-04 04:12:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 04:12:21,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-04 04:12:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:12:21,819 INFO L225 Difference]: With dead ends: 66351 [2021-11-04 04:12:21,820 INFO L226 Difference]: Without dead ends: 41955 [2021-11-04 04:12:21,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.80ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-04 04:12:21,842 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2170 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 4646 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4526.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2170 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4646 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5096.82ms IncrementalHoareTripleChecker+Time [2021-11-04 04:12:21,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2170 Valid, 0 Invalid, 4670 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [23 Valid, 4646 Invalid, 1 Unknown, 0 Unchecked, 5096.82ms Time] [2021-11-04 04:12:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41955 states. [2021-11-04 04:12:22,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41955 to 22065. [2021-11-04 04:12:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22065 states, 22064 states have (on average 1.4674583031182016) internal successors, (32378), 22064 states have internal predecessors, (32378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22065 states to 22065 states and 32378 transitions. [2021-11-04 04:12:22,463 INFO L78 Accepts]: Start accepts. Automaton has 22065 states and 32378 transitions. Word has length 120 [2021-11-04 04:12:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:12:22,463 INFO L470 AbstractCegarLoop]: Abstraction has 22065 states and 32378 transitions. [2021-11-04 04:12:22,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 22065 states and 32378 transitions. [2021-11-04 04:12:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-04 04:12:22,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:12:22,474 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:12:22,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-04 04:12:22,475 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:12:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:12:22,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1507540082, now seen corresponding path program 1 times [2021-11-04 04:12:22,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:12:22,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525711608] [2021-11-04 04:12:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:12:22,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:12:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:12:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-04 04:12:22,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:12:22,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525711608] [2021-11-04 04:12:22,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525711608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:12:22,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:12:22,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 04:12:22,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429697134] [2021-11-04 04:12:22,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:12:22,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 04:12:22,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:12:22,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 04:12:22,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 04:12:22,532 INFO L87 Difference]: Start difference. First operand 22065 states and 32378 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:25,405 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:12:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:12:27,408 INFO L93 Difference]: Finished difference Result 50475 states and 73944 transitions. [2021-11-04 04:12:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-04 04:12:27,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-04 04:12:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:12:27,455 INFO L225 Difference]: With dead ends: 50475 [2021-11-04 04:12:27,455 INFO L226 Difference]: Without dead ends: 28463 [2021-11-04 04:12:27,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.70ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 04:12:27,477 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1514 mSDsluCounter, 2591 mSDsCounter, 0 mSdLazyCounter, 4661 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3857.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4661 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4255.95ms IncrementalHoareTripleChecker+Time [2021-11-04 04:12:27,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1514 Valid, 0 Invalid, 4662 Unknown, 0 Unchecked, 6.03ms Time], IncrementalHoareTripleChecker [0 Valid, 4661 Invalid, 1 Unknown, 0 Unchecked, 4255.95ms Time] [2021-11-04 04:12:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28463 states. [2021-11-04 04:12:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28463 to 22105. [2021-11-04 04:12:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22105 states, 22104 states have (on average 1.466612377850163) internal successors, (32418), 22104 states have internal predecessors, (32418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22105 states to 22105 states and 32418 transitions. [2021-11-04 04:12:28,044 INFO L78 Accepts]: Start accepts. Automaton has 22105 states and 32418 transitions. Word has length 123 [2021-11-04 04:12:28,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:12:28,045 INFO L470 AbstractCegarLoop]: Abstraction has 22105 states and 32418 transitions. [2021-11-04 04:12:28,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 22105 states and 32418 transitions. [2021-11-04 04:12:28,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-04 04:12:28,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:12:28,076 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:12:28,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-04 04:12:28,076 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:12:28,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:12:28,077 INFO L85 PathProgramCache]: Analyzing trace with hash -160571663, now seen corresponding path program 1 times [2021-11-04 04:12:28,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:12:28,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427659682] [2021-11-04 04:12:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:12:28,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:12:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:12:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-04 04:12:28,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:12:28,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427659682] [2021-11-04 04:12:28,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427659682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:12:28,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:12:28,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-04 04:12:28,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425210381] [2021-11-04 04:12:28,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:12:28,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 04:12:28,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:12:28,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 04:12:28,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-04 04:12:28,146 INFO L87 Difference]: Start difference. First operand 22105 states and 32418 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:31,163 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:12:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:12:36,568 INFO L93 Difference]: Finished difference Result 104726 states and 153705 transitions. [2021-11-04 04:12:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-04 04:12:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-04 04:12:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:12:36,705 INFO L225 Difference]: With dead ends: 104726 [2021-11-04 04:12:36,706 INFO L226 Difference]: Without dead ends: 82674 [2021-11-04 04:12:36,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.24ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-04 04:12:36,749 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3636 mSDsluCounter, 3838 mSDsCounter, 0 mSdLazyCounter, 6459 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5752.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3636 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.40ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 6459 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6557.83ms IncrementalHoareTripleChecker+Time [2021-11-04 04:12:36,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3636 Valid, 0 Invalid, 6473 Unknown, 0 Unchecked, 12.40ms Time], IncrementalHoareTripleChecker [13 Valid, 6459 Invalid, 1 Unknown, 0 Unchecked, 6557.83ms Time] [2021-11-04 04:12:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82674 states. [2021-11-04 04:12:37,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82674 to 22153. [2021-11-04 04:12:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22153 states, 22152 states have (on average 1.4656013001083423) internal successors, (32466), 22152 states have internal predecessors, (32466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22153 states to 22153 states and 32466 transitions. [2021-11-04 04:12:37,760 INFO L78 Accepts]: Start accepts. Automaton has 22153 states and 32466 transitions. Word has length 130 [2021-11-04 04:12:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:12:37,761 INFO L470 AbstractCegarLoop]: Abstraction has 22153 states and 32466 transitions. [2021-11-04 04:12:37,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 22153 states and 32466 transitions. [2021-11-04 04:12:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-04 04:12:37,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:12:37,773 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:12:37,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-04 04:12:37,774 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:12:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:12:37,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1667112008, now seen corresponding path program 1 times [2021-11-04 04:12:37,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:12:37,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159781993] [2021-11-04 04:12:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:12:37,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:12:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:12:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-04 04:12:37,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:12:37,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159781993] [2021-11-04 04:12:37,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159781993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:12:37,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:12:37,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 04:12:37,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554235218] [2021-11-04 04:12:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:12:37,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 04:12:37,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:12:37,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 04:12:37,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:12:37,848 INFO L87 Difference]: Start difference. First operand 22153 states and 32466 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:40,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:12:42,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:12:42,759 INFO L93 Difference]: Finished difference Result 52884 states and 77527 transitions. [2021-11-04 04:12:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 04:12:42,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-04 04:12:42,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:12:42,801 INFO L225 Difference]: With dead ends: 52884 [2021-11-04 04:12:42,801 INFO L226 Difference]: Without dead ends: 29685 [2021-11-04 04:12:42,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.35ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:12:42,820 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1126 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3465.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.12ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3808.73ms IncrementalHoareTripleChecker+Time [2021-11-04 04:12:42,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 0 Invalid, 2587 Unknown, 0 Unchecked, 3.12ms Time], IncrementalHoareTripleChecker [2 Valid, 2584 Invalid, 1 Unknown, 0 Unchecked, 3808.73ms Time] [2021-11-04 04:12:42,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29685 states. [2021-11-04 04:12:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29685 to 29645. [2021-11-04 04:12:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29645 states, 29644 states have (on average 1.464377277020645) internal successors, (43410), 29644 states have internal predecessors, (43410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29645 states to 29645 states and 43410 transitions. [2021-11-04 04:12:43,978 INFO L78 Accepts]: Start accepts. Automaton has 29645 states and 43410 transitions. Word has length 133 [2021-11-04 04:12:43,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:12:43,978 INFO L470 AbstractCegarLoop]: Abstraction has 29645 states and 43410 transitions. [2021-11-04 04:12:43,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 29645 states and 43410 transitions. [2021-11-04 04:12:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-04 04:12:43,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:12:43,996 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:12:43,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-04 04:12:43,996 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:12:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:12:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1364297893, now seen corresponding path program 1 times [2021-11-04 04:12:43,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:12:43,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430813880] [2021-11-04 04:12:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:12:43,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:12:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:12:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-04 04:12:44,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:12:44,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430813880] [2021-11-04 04:12:44,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430813880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:12:44,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:12:44,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-04 04:12:44,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454207089] [2021-11-04 04:12:44,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:12:44,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-04 04:12:44,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:12:44,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-04 04:12:44,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-04 04:12:44,174 INFO L87 Difference]: Start difference. First operand 29645 states and 43410 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:47,398 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:12:51,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:12:51,389 INFO L93 Difference]: Finished difference Result 73366 states and 107187 transitions. [2021-11-04 04:12:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-04 04:12:51,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-04 04:12:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:12:51,454 INFO L225 Difference]: With dead ends: 73366 [2021-11-04 04:12:51,454 INFO L226 Difference]: Without dead ends: 43774 [2021-11-04 04:12:51,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.66ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-04 04:12:51,493 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2274 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 7425 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5073.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2274 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.20ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5750.69ms IncrementalHoareTripleChecker+Time [2021-11-04 04:12:51,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2274 Valid, 0 Invalid, 7427 Unknown, 0 Unchecked, 24.20ms Time], IncrementalHoareTripleChecker [1 Valid, 7425 Invalid, 1 Unknown, 0 Unchecked, 5750.69ms Time] [2021-11-04 04:12:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43774 states. [2021-11-04 04:12:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43774 to 25208. [2021-11-04 04:12:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25208 states, 25207 states have (on average 1.4634823660094418) internal successors, (36890), 25207 states have internal predecessors, (36890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25208 states to 25208 states and 36890 transitions. [2021-11-04 04:12:52,601 INFO L78 Accepts]: Start accepts. Automaton has 25208 states and 36890 transitions. Word has length 141 [2021-11-04 04:12:52,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:12:52,601 INFO L470 AbstractCegarLoop]: Abstraction has 25208 states and 36890 transitions. [2021-11-04 04:12:52,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:52,601 INFO L276 IsEmpty]: Start isEmpty. Operand 25208 states and 36890 transitions. [2021-11-04 04:12:52,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-04 04:12:52,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:12:52,613 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:12:52,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-04 04:12:52,613 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:12:52,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:12:52,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1536352515, now seen corresponding path program 1 times [2021-11-04 04:12:52,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:12:52,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067155418] [2021-11-04 04:12:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:12:52,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:12:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:12:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-04 04:12:52,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:12:52,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067155418] [2021-11-04 04:12:52,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067155418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:12:52,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:12:52,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 04:12:52,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845690755] [2021-11-04 04:12:52,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:12:52,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 04:12:52,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:12:52,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 04:12:52,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:12:52,759 INFO L87 Difference]: Start difference. First operand 25208 states and 36890 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:55,278 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:12:57,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:12:57,148 INFO L93 Difference]: Finished difference Result 38154 states and 55878 transitions. [2021-11-04 04:12:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 04:12:57,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-04 04:12:57,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:12:57,167 INFO L225 Difference]: With dead ends: 38154 [2021-11-04 04:12:57,168 INFO L226 Difference]: Without dead ends: 12999 [2021-11-04 04:12:57,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.42ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:12:57,195 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 731 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3393.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.16ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3737.48ms IncrementalHoareTripleChecker+Time [2021-11-04 04:12:57,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 0 Invalid, 2493 Unknown, 0 Unchecked, 3.16ms Time], IncrementalHoareTripleChecker [17 Valid, 2475 Invalid, 1 Unknown, 0 Unchecked, 3737.48ms Time] [2021-11-04 04:12:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12999 states. [2021-11-04 04:12:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12999 to 11314. [2021-11-04 04:12:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11314 states, 11313 states have (on average 1.457880314682224) internal successors, (16493), 11313 states have internal predecessors, (16493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11314 states to 11314 states and 16493 transitions. [2021-11-04 04:12:57,738 INFO L78 Accepts]: Start accepts. Automaton has 11314 states and 16493 transitions. Word has length 146 [2021-11-04 04:12:57,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:12:57,739 INFO L470 AbstractCegarLoop]: Abstraction has 11314 states and 16493 transitions. [2021-11-04 04:12:57,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:12:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 11314 states and 16493 transitions. [2021-11-04 04:12:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-04 04:12:57,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:12:57,745 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:12:57,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-04 04:12:57,745 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:12:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:12:57,746 INFO L85 PathProgramCache]: Analyzing trace with hash -290010734, now seen corresponding path program 1 times [2021-11-04 04:12:57,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:12:57,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577563043] [2021-11-04 04:12:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:12:57,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:12:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:12:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-04 04:12:57,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:12:57,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577563043] [2021-11-04 04:12:57,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577563043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:12:57,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:12:57,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-04 04:12:57,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033925653] [2021-11-04 04:12:57,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:12:57,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 04:12:57,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:12:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 04:12:57,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:12:57,846 INFO L87 Difference]: Start difference. First operand 11314 states and 16493 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:00,407 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:13:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:13:01,183 INFO L93 Difference]: Finished difference Result 16585 states and 24185 transitions. [2021-11-04 04:13:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 04:13:01,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-04 04:13:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:13:01,190 INFO L225 Difference]: With dead ends: 16585 [2021-11-04 04:13:01,190 INFO L226 Difference]: Without dead ends: 4582 [2021-11-04 04:13:01,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.38ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:13:01,200 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1120 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2856.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3098.42ms IncrementalHoareTripleChecker+Time [2021-11-04 04:13:01,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 0 Invalid, 1405 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [1 Valid, 1403 Invalid, 1 Unknown, 0 Unchecked, 3098.42ms Time] [2021-11-04 04:13:01,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-11-04 04:13:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4005. [2021-11-04 04:13:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4005 states, 4004 states have (on average 1.4488011988011988) internal successors, (5801), 4004 states have internal predecessors, (5801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 5801 transitions. [2021-11-04 04:13:01,355 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 5801 transitions. Word has length 148 [2021-11-04 04:13:01,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:13:01,355 INFO L470 AbstractCegarLoop]: Abstraction has 4005 states and 5801 transitions. [2021-11-04 04:13:01,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 5801 transitions. [2021-11-04 04:13:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-04 04:13:01,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:13:01,363 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:13:01,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-04 04:13:01,363 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:13:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:13:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash 527780847, now seen corresponding path program 1 times [2021-11-04 04:13:01,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:13:01,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876884019] [2021-11-04 04:13:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:13:01,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:13:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:13:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-04 04:13:01,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:13:01,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876884019] [2021-11-04 04:13:01,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876884019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:13:01,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:13:01,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-04 04:13:01,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54962123] [2021-11-04 04:13:01,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:13:01,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-04 04:13:01,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:13:01,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-04 04:13:01,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-04 04:13:01,588 INFO L87 Difference]: Start difference. First operand 4005 states and 5801 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:05,221 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:13:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:13:10,458 INFO L93 Difference]: Finished difference Result 15401 states and 22385 transitions. [2021-11-04 04:13:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-04 04:13:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-04 04:13:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:13:10,482 INFO L225 Difference]: With dead ends: 15401 [2021-11-04 04:13:10,482 INFO L226 Difference]: Without dead ends: 11482 [2021-11-04 04:13:10,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.31ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-04 04:13:10,489 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 7613 mSDsluCounter, 11110 mSDsCounter, 0 mSdLazyCounter, 13612 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7174.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7613 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 13615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.48ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13612 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8206.13ms IncrementalHoareTripleChecker+Time [2021-11-04 04:13:10,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7613 Valid, 0 Invalid, 13615 Unknown, 0 Unchecked, 20.48ms Time], IncrementalHoareTripleChecker [2 Valid, 13612 Invalid, 1 Unknown, 0 Unchecked, 8206.13ms Time] [2021-11-04 04:13:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-11-04 04:13:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 4035. [2021-11-04 04:13:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 4034 states have (on average 1.4454635597421914) internal successors, (5831), 4034 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 5831 transitions. [2021-11-04 04:13:10,729 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 5831 transitions. Word has length 156 [2021-11-04 04:13:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:13:10,730 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 5831 transitions. [2021-11-04 04:13:10,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 5831 transitions. [2021-11-04 04:13:10,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-04 04:13:10,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:13:10,733 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:13:10,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-04 04:13:10,733 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:13:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:13:10,733 INFO L85 PathProgramCache]: Analyzing trace with hash 972368043, now seen corresponding path program 1 times [2021-11-04 04:13:10,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:13:10,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787046950] [2021-11-04 04:13:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:13:10,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:13:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:13:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-04 04:13:10,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:13:10,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787046950] [2021-11-04 04:13:10,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787046950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:13:10,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:13:10,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-04 04:13:10,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261881168] [2021-11-04 04:13:10,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:13:10,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-04 04:13:10,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:13:10,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-04 04:13:10,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-04 04:13:10,867 INFO L87 Difference]: Start difference. First operand 4035 states and 5831 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:14,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:13:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:13:21,551 INFO L93 Difference]: Finished difference Result 26936 states and 39003 transitions. [2021-11-04 04:13:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-04 04:13:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-04 04:13:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:13:21,580 INFO L225 Difference]: With dead ends: 26936 [2021-11-04 04:13:21,580 INFO L226 Difference]: Without dead ends: 22987 [2021-11-04 04:13:21,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.18ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-04 04:13:21,592 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 6814 mSDsluCounter, 13483 mSDsCounter, 0 mSdLazyCounter, 17751 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8249.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6814 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 17783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.22ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 17751 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9358.84ms IncrementalHoareTripleChecker+Time [2021-11-04 04:13:21,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6814 Valid, 0 Invalid, 17783 Unknown, 0 Unchecked, 27.22ms Time], IncrementalHoareTripleChecker [31 Valid, 17751 Invalid, 1 Unknown, 0 Unchecked, 9358.84ms Time] [2021-11-04 04:13:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22987 states. [2021-11-04 04:13:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22987 to 8028. [2021-11-04 04:13:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8028 states, 8027 states have (on average 1.4444998131306839) internal successors, (11595), 8027 states have internal predecessors, (11595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8028 states to 8028 states and 11595 transitions. [2021-11-04 04:13:22,029 INFO L78 Accepts]: Start accepts. Automaton has 8028 states and 11595 transitions. Word has length 158 [2021-11-04 04:13:22,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:13:22,030 INFO L470 AbstractCegarLoop]: Abstraction has 8028 states and 11595 transitions. [2021-11-04 04:13:22,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 8028 states and 11595 transitions. [2021-11-04 04:13:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-04 04:13:22,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:13:22,037 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:13:22,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-04 04:13:22,037 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:13:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:13:22,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1848387049, now seen corresponding path program 1 times [2021-11-04 04:13:22,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:13:22,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850833685] [2021-11-04 04:13:22,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:13:22,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:13:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:13:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-04 04:13:22,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:13:22,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850833685] [2021-11-04 04:13:22,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850833685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:13:22,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:13:22,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-04 04:13:22,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379622791] [2021-11-04 04:13:22,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:13:22,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-04 04:13:22,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:13:22,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-04 04:13:22,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-04 04:13:22,271 INFO L87 Difference]: Start difference. First operand 8028 states and 11595 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:25,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:13:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:13:33,218 INFO L93 Difference]: Finished difference Result 35388 states and 51219 transitions. [2021-11-04 04:13:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-04 04:13:33,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-04 04:13:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:13:33,258 INFO L225 Difference]: With dead ends: 35388 [2021-11-04 04:13:33,258 INFO L226 Difference]: Without dead ends: 27506 [2021-11-04 04:13:33,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.84ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-04 04:13:33,273 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3573 mSDsluCounter, 6639 mSDsCounter, 0 mSdLazyCounter, 10094 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7981.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3573 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.45ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10094 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9181.15ms IncrementalHoareTripleChecker+Time [2021-11-04 04:13:33,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3573 Valid, 0 Invalid, 10102 Unknown, 0 Unchecked, 16.45ms Time], IncrementalHoareTripleChecker [7 Valid, 10094 Invalid, 1 Unknown, 0 Unchecked, 9181.15ms Time] [2021-11-04 04:13:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27506 states. [2021-11-04 04:13:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27506 to 8060. [2021-11-04 04:13:33,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8060 states, 8059 states have (on average 1.442734830624147) internal successors, (11627), 8059 states have internal predecessors, (11627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8060 states to 8060 states and 11627 transitions. [2021-11-04 04:13:33,872 INFO L78 Accepts]: Start accepts. Automaton has 8060 states and 11627 transitions. Word has length 158 [2021-11-04 04:13:33,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:13:33,873 INFO L470 AbstractCegarLoop]: Abstraction has 8060 states and 11627 transitions. [2021-11-04 04:13:33,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:33,873 INFO L276 IsEmpty]: Start isEmpty. Operand 8060 states and 11627 transitions. [2021-11-04 04:13:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-04 04:13:33,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:13:33,879 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:13:33,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-04 04:13:33,879 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:13:33,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:13:33,879 INFO L85 PathProgramCache]: Analyzing trace with hash -622349658, now seen corresponding path program 1 times [2021-11-04 04:13:33,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:13:33,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786542577] [2021-11-04 04:13:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:13:33,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:13:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:13:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:13:35,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:13:35,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786542577] [2021-11-04 04:13:35,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786542577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-04 04:13:35,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342444604] [2021-11-04 04:13:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:13:35,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 04:13:35,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 04:13:35,075 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) [2021-11-04 04:13:35,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-04 04:13:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:13:35,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-04 04:13:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:13:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-04 04:13:36,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 04:13:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-04 04:13:36,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342444604] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-04 04:13:36,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-04 04:13:36,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [23, 15] total 44 [2021-11-04 04:13:36,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427795138] [2021-11-04 04:13:36,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:13:36,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-04 04:13:36,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:13:36,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-04 04:13:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2021-11-04 04:13:36,996 INFO L87 Difference]: Start difference. First operand 8060 states and 11627 transitions. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:42,814 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:13:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:13:54,741 INFO L93 Difference]: Finished difference Result 40008 states and 57859 transitions. [2021-11-04 04:13:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-04 04:13:54,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-04 04:13:54,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:13:54,790 INFO L225 Difference]: With dead ends: 40008 [2021-11-04 04:13:54,790 INFO L226 Difference]: Without dead ends: 32094 [2021-11-04 04:13:54,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1229.72ms TimeCoverageRelationStatistics Valid=158, Invalid=2194, Unknown=0, NotChecked=0, Total=2352 [2021-11-04 04:13:54,805 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 11535 mSDsluCounter, 19275 mSDsCounter, 0 mSdLazyCounter, 23638 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13190.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11535 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.04ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 23638 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15067.80ms IncrementalHoareTripleChecker+Time [2021-11-04 04:13:54,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11535 Valid, 0 Invalid, 23678 Unknown, 0 Unchecked, 40.04ms Time], IncrementalHoareTripleChecker [39 Valid, 23638 Invalid, 1 Unknown, 0 Unchecked, 15067.80ms Time] [2021-11-04 04:13:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32094 states. [2021-11-04 04:13:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32094 to 8084. [2021-11-04 04:13:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8084 states, 8083 states have (on average 1.4404305332178646) internal successors, (11643), 8083 states have internal predecessors, (11643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8084 states to 8084 states and 11643 transitions. [2021-11-04 04:13:55,523 INFO L78 Accepts]: Start accepts. Automaton has 8084 states and 11643 transitions. Word has length 158 [2021-11-04 04:13:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:13:55,523 INFO L470 AbstractCegarLoop]: Abstraction has 8084 states and 11643 transitions. [2021-11-04 04:13:55,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:13:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 8084 states and 11643 transitions. [2021-11-04 04:13:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-04 04:13:55,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:13:55,543 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:13:55,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-04 04:13:55,744 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,SelfDestructingSolverStorable20 [2021-11-04 04:13:55,744 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:13:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:13:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1108652355, now seen corresponding path program 1 times [2021-11-04 04:13:55,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:13:55,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385647107] [2021-11-04 04:13:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:13:55,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:13:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:13:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-04 04:13:56,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:13:56,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385647107] [2021-11-04 04:13:56,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385647107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:13:56,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:13:56,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-04 04:13:56,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959915028] [2021-11-04 04:13:56,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:13:56,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-04 04:13:56,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:13:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-04 04:13:56,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-04 04:13:56,349 INFO L87 Difference]: Start difference. First operand 8084 states and 11643 transitions. Second operand has 16 states, 16 states have (on average 9.75) internal successors, (156), 15 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:14:03,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:14:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:14:16,376 INFO L93 Difference]: Finished difference Result 24744 states and 35709 transitions. [2021-11-04 04:14:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-04 04:14:16,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.75) internal successors, (156), 15 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-11-04 04:14:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:14:16,399 INFO L225 Difference]: With dead ends: 24744 [2021-11-04 04:14:16,400 INFO L226 Difference]: Without dead ends: 16806 [2021-11-04 04:14:16,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1191.34ms TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-11-04 04:14:16,409 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4788 mSDsluCounter, 21884 mSDsCounter, 0 mSdLazyCounter, 29256 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15037.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4788 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 29309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 63.08ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 29256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17246.70ms IncrementalHoareTripleChecker+Time [2021-11-04 04:14:16,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4788 Valid, 0 Invalid, 29309 Unknown, 0 Unchecked, 63.08ms Time], IncrementalHoareTripleChecker [52 Valid, 29256 Invalid, 1 Unknown, 0 Unchecked, 17246.70ms Time] [2021-11-04 04:14:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16806 states. [2021-11-04 04:14:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16806 to 8124. [2021-11-04 04:14:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 1.4392465837744675) internal successors, (11691), 8123 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:14:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 11691 transitions. [2021-11-04 04:14:17,128 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 11691 transitions. Word has length 166 [2021-11-04 04:14:17,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:14:17,129 INFO L470 AbstractCegarLoop]: Abstraction has 8124 states and 11691 transitions. [2021-11-04 04:14:17,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.75) internal successors, (156), 15 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:14:17,129 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 11691 transitions. [2021-11-04 04:14:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-04 04:14:17,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:14:17,135 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:14:17,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-04 04:14:17,135 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:14:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:14:17,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1340947775, now seen corresponding path program 1 times [2021-11-04 04:14:17,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:14:17,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511559854] [2021-11-04 04:14:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:14:17,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:14:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:14:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:14:18,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:14:18,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511559854] [2021-11-04 04:14:18,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511559854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-04 04:14:18,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:14:18,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-04 04:14:18,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028174871] [2021-11-04 04:14:18,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-04 04:14:18,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-04 04:14:18,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:14:18,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-04 04:14:18,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-11-04 04:14:18,464 INFO L87 Difference]: Start difference. First operand 8124 states and 11691 transitions. Second operand has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 28 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:14:29,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:17:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:17:24,482 INFO L93 Difference]: Finished difference Result 240088 states and 349275 transitions. [2021-11-04 04:17:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2021-11-04 04:17:24,483 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 28 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-11-04 04:17:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:17:25,284 INFO L225 Difference]: With dead ends: 240088 [2021-11-04 04:17:25,284 INFO L226 Difference]: Without dead ends: 232110 [2021-11-04 04:17:25,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25490 ImplicationChecksByTransitivity, 16432.02ms TimeCoverageRelationStatistics Valid=7081, Invalid=60259, Unknown=0, NotChecked=0, Total=67340 [2021-11-04 04:17:25,368 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 39199 mSDsluCounter, 196335 mSDsCounter, 0 mSdLazyCounter, 245170 mSolverCounterSat, 581 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119846.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39199 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 731.58ms SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 245170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137962.92ms IncrementalHoareTripleChecker+Time [2021-11-04 04:17:25,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39199 Valid, 0 Invalid, 245752 Unknown, 0 Unchecked, 731.58ms Time], IncrementalHoareTripleChecker [581 Valid, 245170 Invalid, 1 Unknown, 0 Unchecked, 137962.92ms Time] [2021-11-04 04:17:25,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232110 states. [2021-11-04 04:17:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232110 to 18586. [2021-11-04 04:17:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18586 states, 18585 states have (on average 1.4501479687920367) internal successors, (26951), 18585 states have internal predecessors, (26951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:17:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18586 states to 18586 states and 26951 transitions. [2021-11-04 04:17:29,433 INFO L78 Accepts]: Start accepts. Automaton has 18586 states and 26951 transitions. Word has length 166 [2021-11-04 04:17:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:17:29,433 INFO L470 AbstractCegarLoop]: Abstraction has 18586 states and 26951 transitions. [2021-11-04 04:17:29,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 28 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:17:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 18586 states and 26951 transitions. [2021-11-04 04:17:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-04 04:17:29,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:17:29,446 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:17:29,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-04 04:17:29,446 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:17:29,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:17:29,446 INFO L85 PathProgramCache]: Analyzing trace with hash -115618885, now seen corresponding path program 1 times [2021-11-04 04:17:29,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-04 04:17:29,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996621835] [2021-11-04 04:17:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:17:29,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-04 04:17:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:17:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-04 04:17:30,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-04 04:17:30,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996621835] [2021-11-04 04:17:30,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996621835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-04 04:17:30,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505054848] [2021-11-04 04:17:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:17:30,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 04:17:30,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 04:17:30,143 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) [2021-11-04 04:17:30,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-04 04:17:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:17:30,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-04 04:17:30,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:17:31,585 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-04 04:17:31,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 14 [2021-11-04 04:17:31,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-04 04:17:32,216 INFO L354 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2021-11-04 04:17:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2021-11-04 04:17:36,501 INFO L354 Elim1Store]: treesize reduction 70, result has 24.7 percent of original size [2021-11-04 04:17:36,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 58 [2021-11-04 04:17:36,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-11-04 04:17:41,087 INFO L354 Elim1Store]: treesize reduction 99, result has 28.8 percent of original size [2021-11-04 04:17:41,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 73 treesize of output 101 [2021-11-04 04:17:41,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-04 04:17:41,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-04 04:17:41,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-04 04:17:41,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673187678] [2021-11-04 04:17:41,093 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-04 04:17:41,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-04 04:17:41,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-04 04:17:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-04 04:17:41,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1968, Unknown=2, NotChecked=0, Total=2162 [2021-11-04 04:17:41,095 INFO L87 Difference]: Start difference. First operand 18586 states and 26951 transitions. Second operand has 25 states, 25 states have (on average 6.6) internal successors, (165), 24 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:17:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-04 04:17:41,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 9176.80ms TimeCoverageRelationStatistics Valid=192, Invalid=1968, Unknown=2, NotChecked=0, Total=2162 [2021-11-04 04:17:41,096 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-04 04:17:41,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.01ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-04 04:17:41,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-04 04:17:41,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-04 04:17:41,312 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@76451f09 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-04 04:17:41,318 INFO L158 Benchmark]: Toolchain (without parser) took 380739.85ms. Allocated memory was 140.5MB in the beginning and 3.6GB in the end (delta: 3.5GB). Free memory was 102.7MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 1.8GB. Max. memory is 16.1GB. [2021-11-04 04:17:41,319 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 90.2MB. Free memory was 48.5MB in the beginning and 48.4MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-04 04:17:41,319 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1285.62ms. Allocated memory is still 140.5MB. Free memory was 102.7MB in the beginning and 79.8MB in the end (delta: 23.0MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. [2021-11-04 04:17:41,319 INFO L158 Benchmark]: Boogie Procedure Inliner took 176.90ms. Allocated memory is still 140.5MB. Free memory was 79.8MB in the beginning and 56.7MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-04 04:17:41,319 INFO L158 Benchmark]: Boogie Preprocessor took 181.03ms. Allocated memory was 140.5MB in the beginning and 249.6MB in the end (delta: 109.1MB). Free memory was 56.7MB in the beginning and 176.5MB in the end (delta: -119.8MB). Peak memory consumption was 18.1MB. Max. memory is 16.1GB. [2021-11-04 04:17:41,322 INFO L158 Benchmark]: RCFGBuilder took 1258.32ms. Allocated memory is still 249.6MB. Free memory was 176.5MB in the beginning and 121.6MB in the end (delta: 54.9MB). Peak memory consumption was 86.5MB. Max. memory is 16.1GB. [2021-11-04 04:17:41,323 INFO L158 Benchmark]: TraceAbstraction took 377831.91ms. Allocated memory was 249.6MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 121.6MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 1.7GB. Max. memory is 16.1GB. [2021-11-04 04:17:41,324 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 90.2MB. Free memory was 48.5MB in the beginning and 48.4MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1285.62ms. Allocated memory is still 140.5MB. Free memory was 102.7MB in the beginning and 79.8MB in the end (delta: 23.0MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 176.90ms. Allocated memory is still 140.5MB. Free memory was 79.8MB in the beginning and 56.7MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 181.03ms. Allocated memory was 140.5MB in the beginning and 249.6MB in the end (delta: 109.1MB). Free memory was 56.7MB in the beginning and 176.5MB in the end (delta: -119.8MB). Peak memory consumption was 18.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1258.32ms. Allocated memory is still 249.6MB. Free memory was 176.5MB in the beginning and 121.6MB in the end (delta: 54.9MB). Peak memory consumption was 86.5MB. Max. memory is 16.1GB. * TraceAbstraction took 377831.91ms. Allocated memory was 249.6MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 121.6MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 1.7GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@76451f09 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@76451f09: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-04 04:17:41,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-c36dfa3 [2021-11-04 04:17:43,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-04 04:17:43,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-04 04:17:43,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-04 04:17:43,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-04 04:17:43,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-04 04:17:43,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-04 04:17:43,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-04 04:17:43,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-04 04:17:43,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-04 04:17:43,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-04 04:17:43,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-04 04:17:43,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-04 04:17:43,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-04 04:17:43,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-04 04:17:43,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-04 04:17:43,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-04 04:17:43,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-04 04:17:43,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-04 04:17:43,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-04 04:17:43,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-04 04:17:43,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-04 04:17:43,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-04 04:17:43,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-04 04:17:43,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-04 04:17:43,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-04 04:17:43,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-04 04:17:43,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-04 04:17:43,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-04 04:17:43,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-04 04:17:43,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-04 04:17:43,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-04 04:17:43,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-04 04:17:43,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-04 04:17:43,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-04 04:17:43,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-04 04:17:43,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-04 04:17:43,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-04 04:17:43,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-04 04:17:43,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-04 04:17:43,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-04 04:17:43,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-04 04:17:43,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-04 04:17:43,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-04 04:17:43,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-04 04:17:43,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-04 04:17:43,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-04 04:17:43,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-04 04:17:43,309 INFO L138 SettingsManager]: * Use SBE=true [2021-11-04 04:17:43,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-04 04:17:43,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-04 04:17:43,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-04 04:17:43,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-04 04:17:43,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-04 04:17:43,311 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-04 04:17:43,311 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-04 04:17:43,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-04 04:17:43,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-04 04:17:43,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-04 04:17:43,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-04 04:17:43,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-04 04:17:43,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-04 04:17:43,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-04 04:17:43,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-04 04:17:43,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-04 04:17:43,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-04 04:17:43,312 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-04 04:17:43,313 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-04 04:17:43,313 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-04 04:17:43,313 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-04 04:17:43,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-04 04:17:43,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-04 04:17:43,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-04 04:17:43,313 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-04 04:17:43,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-04 04:17:43,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-04 04:17:43,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-04 04:17:43,641 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-04 04:17:43,642 INFO L275 PluginConnector]: CDTParser initialized [2021-11-04 04:17:43,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-04 04:17:43,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bea174bb/8162999359924ecca098d890a3bbe22a/FLAGcd121b07e [2021-11-04 04:17:44,394 INFO L306 CDTParser]: Found 1 translation units. [2021-11-04 04:17:44,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-04 04:17:44,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bea174bb/8162999359924ecca098d890a3bbe22a/FLAGcd121b07e [2021-11-04 04:17:44,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bea174bb/8162999359924ecca098d890a3bbe22a [2021-11-04 04:17:44,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-04 04:17:44,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-04 04:17:44,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-04 04:17:44,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-04 04:17:44,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-04 04:17:44,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 04:17:44" (1/1) ... [2021-11-04 04:17:44,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e44437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:44, skipping insertion in model container [2021-11-04 04:17:44,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 04:17:44" (1/1) ... [2021-11-04 04:17:44,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-04 04:17:44,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-04 04:17:45,431 WARN L228 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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-04 04:17:45,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-04 04:17:45,722 INFO L203 MainTranslator]: Completed pre-run [2021-11-04 04:17:45,831 WARN L228 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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-04 04:17:45,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-04 04:17:46,013 INFO L208 MainTranslator]: Completed translation [2021-11-04 04:17:46,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46 WrapperNode [2021-11-04 04:17:46,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-04 04:17:46,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-04 04:17:46,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-04 04:17:46,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-04 04:17:46,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46" (1/1) ... [2021-11-04 04:17:46,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46" (1/1) ... [2021-11-04 04:17:46,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-04 04:17:46,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-04 04:17:46,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-04 04:17:46,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-04 04:17:46,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46" (1/1) ... [2021-11-04 04:17:46,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46" (1/1) ... [2021-11-04 04:17:46,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46" (1/1) ... [2021-11-04 04:17:46,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46" (1/1) ... [2021-11-04 04:17:46,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46" (1/1) ... [2021-11-04 04:17:46,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46" (1/1) ... [2021-11-04 04:17:46,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46" (1/1) ... [2021-11-04 04:17:46,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-04 04:17:46,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-04 04:17:46,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-04 04:17:46,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-04 04:17:46,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46" (1/1) ... [2021-11-04 04:17:46,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-04 04:17:46,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-04 04:17:46,481 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) [2021-11-04 04:17:46,499 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 [2021-11-04 04:17:46,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-04 04:17:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-04 04:17:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-04 04:17:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-04 04:17:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-04 04:17:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-04 04:17:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-04 04:17:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-04 04:17:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-04 04:17:46,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-04 04:17:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-04 04:17:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-04 04:17:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-04 04:17:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-04 04:17:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-04 04:17:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-04 04:17:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-04 04:17:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-04 04:17:46,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-04 04:17:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-04 04:17:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-04 04:17:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-04 04:17:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-04 04:17:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-04 04:17:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-04 04:17:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-04 04:17:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-04 04:17:46,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-04 04:17:46,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-04 04:17:47,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-04 04:17:47,824 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2021-11-04 04:17:47,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 04:17:47 BoogieIcfgContainer [2021-11-04 04:17:47,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-04 04:17:47,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-04 04:17:47,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-04 04:17:47,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-04 04:17:47,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 04:17:44" (1/3) ... [2021-11-04 04:17:47,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605748cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 04:17:47, skipping insertion in model container [2021-11-04 04:17:47,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 04:17:46" (2/3) ... [2021-11-04 04:17:47,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605748cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 04:17:47, skipping insertion in model container [2021-11-04 04:17:47,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 04:17:47" (3/3) ... [2021-11-04 04:17:47,835 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-04 04:17:47,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-04 04:17:47,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-04 04:17:47,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-04 04:17:47,904 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 [2021-11-04 04:17:47,905 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-04 04:17:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:17:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-04 04:17:47,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:17:47,943 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] [2021-11-04 04:17:47,944 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:17:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:17:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2021-11-04 04:17:47,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-04 04:17:47,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444490709] [2021-11-04 04:17:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:17:47,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-04 04:17:47,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-04 04:17:47,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-04 04:17:47,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-04 04:17:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:17:48,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-04 04:17:48,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:17:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:17:48,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 04:17:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:17:48,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-04 04:17:48,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444490709] [2021-11-04 04:17:48,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444490709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-04 04:17:48,524 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:17:48,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-04 04:17:48,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005657953] [2021-11-04 04:17:48,526 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-04 04:17:48,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 04:17:48,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-04 04:17:48,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 04:17:48,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-04 04:17:48,561 INFO L87 Difference]: Start difference. First operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:17:53,992 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:18:05,547 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:18:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:18:17,999 INFO L93 Difference]: Finished difference Result 3410 states and 5239 transitions. [2021-11-04 04:18:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 04:18:18,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-04 04:18:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:18:18,027 INFO L225 Difference]: With dead ends: 3410 [2021-11-04 04:18:18,029 INFO L226 Difference]: Without dead ends: 2501 [2021-11-04 04:18:18,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.04ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-04 04:18:18,038 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3650 mSDsluCounter, 2476 mSDsCounter, 0 mSdLazyCounter, 3781 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26552.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3650 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 3791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 60.47ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3781 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28850.87ms IncrementalHoareTripleChecker+Time [2021-11-04 04:18:18,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3650 Valid, 12 Invalid, 3791 Unknown, 0 Unchecked, 60.47ms Time], IncrementalHoareTripleChecker [9 Valid, 3781 Invalid, 1 Unknown, 0 Unchecked, 28850.87ms Time] [2021-11-04 04:18:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-11-04 04:18:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2481. [2021-11-04 04:18:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2480 states have (on average 1.4713709677419355) internal successors, (3649), 2480 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:18:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 3649 transitions. [2021-11-04 04:18:18,157 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 3649 transitions. Word has length 36 [2021-11-04 04:18:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:18:18,157 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 3649 transitions. [2021-11-04 04:18:18,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:18:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 3649 transitions. [2021-11-04 04:18:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-04 04:18:18,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:18:18,164 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, 1, 1] [2021-11-04 04:18:18,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-04 04:18:18,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-04 04:18:18,376 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:18:18,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:18:18,378 INFO L85 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2021-11-04 04:18:18,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-04 04:18:18,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787566054] [2021-11-04 04:18:18,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:18:18,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-04 04:18:18,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-04 04:18:18,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-04 04:18:18,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-04 04:18:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:18:18,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-04 04:18:18,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:18:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:18:18,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 04:18:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:18:19,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-04 04:18:19,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787566054] [2021-11-04 04:18:19,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787566054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-04 04:18:19,094 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:18:19,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-04 04:18:19,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072586389] [2021-11-04 04:18:19,095 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-04 04:18:19,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-04 04:18:19,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-04 04:18:19,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-04 04:18:19,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-04 04:18:19,096 INFO L87 Difference]: Start difference. First operand 2481 states and 3649 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:18:38,145 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:19:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:19:09,737 INFO L93 Difference]: Finished difference Result 8146 states and 12015 transitions. [2021-11-04 04:19:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-04 04:19:09,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-04 04:19:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:19:09,762 INFO L225 Difference]: With dead ends: 8146 [2021-11-04 04:19:09,762 INFO L226 Difference]: Without dead ends: 5718 [2021-11-04 04:19:09,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 238.77ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-04 04:19:09,770 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3728 mSDsluCounter, 3788 mSDsCounter, 0 mSdLazyCounter, 6284 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46575.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3728 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 69.75ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 6284 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49896.78ms IncrementalHoareTripleChecker+Time [2021-11-04 04:19:09,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3728 Valid, 0 Invalid, 6291 Unknown, 0 Unchecked, 69.75ms Time], IncrementalHoareTripleChecker [6 Valid, 6284 Invalid, 1 Unknown, 0 Unchecked, 49896.78ms Time] [2021-11-04 04:19:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2021-11-04 04:19:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 2484. [2021-11-04 04:19:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2483 states have (on average 1.4703987112364076) internal successors, (3651), 2483 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:19:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 3651 transitions. [2021-11-04 04:19:09,889 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 3651 transitions. Word has length 40 [2021-11-04 04:19:09,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:19:09,889 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 3651 transitions. [2021-11-04 04:19:09,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:19:09,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 3651 transitions. [2021-11-04 04:19:09,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-04 04:19:09,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:19:09,892 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, 1, 1] [2021-11-04 04:19:09,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-04 04:19:10,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-04 04:19:10,114 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:19:10,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:19:10,115 INFO L85 PathProgramCache]: Analyzing trace with hash -349053682, now seen corresponding path program 1 times [2021-11-04 04:19:10,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-04 04:19:10,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127521780] [2021-11-04 04:19:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:19:10,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-04 04:19:10,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-04 04:19:10,118 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-04 04:19:10,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-04 04:19:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:19:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-04 04:19:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:19:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:19:10,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 04:19:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:19:11,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-04 04:19:11,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127521780] [2021-11-04 04:19:11,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127521780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-04 04:19:11,185 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:19:11,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-04 04:19:11,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668701977] [2021-11-04 04:19:11,185 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-04 04:19:11,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-04 04:19:11,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-04 04:19:11,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-04 04:19:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-04 04:19:11,186 INFO L87 Difference]: Start difference. First operand 2484 states and 3651 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:19:31,433 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:19:48,286 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:19:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:19:55,574 INFO L93 Difference]: Finished difference Result 7337 states and 10818 transitions. [2021-11-04 04:19:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-04 04:19:55,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-04 04:19:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:19:55,587 INFO L225 Difference]: With dead ends: 7337 [2021-11-04 04:19:55,587 INFO L226 Difference]: Without dead ends: 4900 [2021-11-04 04:19:55,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 320.10ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-04 04:19:55,593 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1252 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 5100 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41425.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.96ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43893.96ms IncrementalHoareTripleChecker+Time [2021-11-04 04:19:55,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 0 Invalid, 5103 Unknown, 0 Unchecked, 38.96ms Time], IncrementalHoareTripleChecker [2 Valid, 5100 Invalid, 1 Unknown, 0 Unchecked, 43893.96ms Time] [2021-11-04 04:19:55,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4900 states. [2021-11-04 04:19:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4900 to 4746. [2021-11-04 04:19:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4746 states, 4745 states have (on average 1.4811380400421497) internal successors, (7028), 4745 states have internal predecessors, (7028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:19:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 7028 transitions. [2021-11-04 04:19:55,684 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 7028 transitions. Word has length 40 [2021-11-04 04:19:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:19:55,684 INFO L470 AbstractCegarLoop]: Abstraction has 4746 states and 7028 transitions. [2021-11-04 04:19:55,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:19:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 7028 transitions. [2021-11-04 04:19:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-04 04:19:55,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:19:55,688 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] [2021-11-04 04:19:55,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-04 04:19:55,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-04 04:19:55,917 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:19:55,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:19:55,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2050141973, now seen corresponding path program 1 times [2021-11-04 04:19:55,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-04 04:19:55,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655094054] [2021-11-04 04:19:55,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:19:55,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-04 04:19:55,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-04 04:19:55,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-04 04:19:55,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-04 04:19:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:19:56,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-04 04:19:56,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:19:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:19:56,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 04:19:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:19:57,024 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-04 04:19:57,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655094054] [2021-11-04 04:19:57,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655094054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-04 04:19:57,024 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:19:57,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-04 04:19:57,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560941419] [2021-11-04 04:19:57,024 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-04 04:19:57,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 04:19:57,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-04 04:19:57,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 04:19:57,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:19:57,025 INFO L87 Difference]: Start difference. First operand 4746 states and 7028 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:20:07,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:20:13,456 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:20:20,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:20:20,716 INFO L93 Difference]: Finished difference Result 11625 states and 17257 transitions. [2021-11-04 04:20:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 04:20:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-04 04:20:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:20:20,740 INFO L225 Difference]: With dead ends: 11625 [2021-11-04 04:20:20,741 INFO L226 Difference]: Without dead ends: 6932 [2021-11-04 04:20:20,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.54ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:20:20,748 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 629 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21947.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.87ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23384.96ms IncrementalHoareTripleChecker+Time [2021-11-04 04:20:20,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 0 Invalid, 2526 Unknown, 0 Unchecked, 14.87ms Time], IncrementalHoareTripleChecker [2 Valid, 2523 Invalid, 1 Unknown, 0 Unchecked, 23384.96ms Time] [2021-11-04 04:20:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2021-11-04 04:20:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 6906. [2021-11-04 04:20:20,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6906 states, 6905 states have (on average 1.485590152063722) internal successors, (10258), 6905 states have internal predecessors, (10258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:20:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6906 states to 6906 states and 10258 transitions. [2021-11-04 04:20:20,941 INFO L78 Accepts]: Start accepts. Automaton has 6906 states and 10258 transitions. Word has length 69 [2021-11-04 04:20:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:20:20,942 INFO L470 AbstractCegarLoop]: Abstraction has 6906 states and 10258 transitions. [2021-11-04 04:20:20,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:20:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6906 states and 10258 transitions. [2021-11-04 04:20:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-04 04:20:20,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:20:20,948 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-04 04:20:20,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-04 04:20:21,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-04 04:20:21,165 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:20:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:20:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash -643253754, now seen corresponding path program 1 times [2021-11-04 04:20:21,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-04 04:20:21,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125943108] [2021-11-04 04:20:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:20:21,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-04 04:20:21,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-04 04:20:21,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-04 04:20:21,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-04 04:20:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:20:21,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-04 04:20:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:20:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:20:22,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 04:20:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:20:22,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-04 04:20:22,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125943108] [2021-11-04 04:20:22,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125943108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-04 04:20:22,553 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:20:22,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-04 04:20:22,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373816668] [2021-11-04 04:20:22,553 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-04 04:20:22,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 04:20:22,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-04 04:20:22,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 04:20:22,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:20:22,560 INFO L87 Difference]: Start difference. First operand 6906 states and 10258 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:20:39,128 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:20:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:20:51,308 INFO L93 Difference]: Finished difference Result 16465 states and 24456 transitions. [2021-11-04 04:20:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 04:20:51,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-04 04:20:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:20:51,342 INFO L225 Difference]: With dead ends: 16465 [2021-11-04 04:20:51,342 INFO L226 Difference]: Without dead ends: 9612 [2021-11-04 04:20:51,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.44ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:20:51,349 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 738 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 3170 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26720.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.92ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28389.50ms IncrementalHoareTripleChecker+Time [2021-11-04 04:20:51,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 0 Invalid, 3173 Unknown, 0 Unchecked, 17.92ms Time], IncrementalHoareTripleChecker [2 Valid, 3170 Invalid, 1 Unknown, 0 Unchecked, 28389.50ms Time] [2021-11-04 04:20:51,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2021-11-04 04:20:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 9573. [2021-11-04 04:20:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9573 states, 9572 states have (on average 1.4838069368992897) internal successors, (14203), 9572 states have internal predecessors, (14203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:20:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9573 states to 9573 states and 14203 transitions. [2021-11-04 04:20:51,598 INFO L78 Accepts]: Start accepts. Automaton has 9573 states and 14203 transitions. Word has length 75 [2021-11-04 04:20:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:20:51,599 INFO L470 AbstractCegarLoop]: Abstraction has 9573 states and 14203 transitions. [2021-11-04 04:20:51,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:20:51,600 INFO L276 IsEmpty]: Start isEmpty. Operand 9573 states and 14203 transitions. [2021-11-04 04:20:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-04 04:20:51,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:20:51,607 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:20:51,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-04 04:20:51,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-04 04:20:51,824 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:20:51,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:20:51,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2021-11-04 04:20:51,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-04 04:20:51,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941522276] [2021-11-04 04:20:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:20:51,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-04 04:20:51,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-04 04:20:51,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-04 04:20:51,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-04 04:20:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:20:52,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-04 04:20:52,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:20:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:20:52,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 04:20:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-04 04:20:53,135 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-04 04:20:53,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941522276] [2021-11-04 04:20:53,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941522276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-04 04:20:53,136 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:20:53,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-04 04:20:53,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142865626] [2021-11-04 04:20:53,136 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-04 04:20:53,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-04 04:20:53,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-04 04:20:53,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-04 04:20:53,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-04 04:20:53,137 INFO L87 Difference]: Start difference. First operand 9573 states and 14203 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:21:02,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:21:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:21:20,514 INFO L93 Difference]: Finished difference Result 24224 states and 36235 transitions. [2021-11-04 04:21:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-04 04:21:20,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-04 04:21:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:21:20,546 INFO L225 Difference]: With dead ends: 24224 [2021-11-04 04:21:20,546 INFO L226 Difference]: Without dead ends: 14704 [2021-11-04 04:21:20,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.49ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-04 04:21:20,560 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2125 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 3051 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25053.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.42ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3051 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26872.34ms IncrementalHoareTripleChecker+Time [2021-11-04 04:21:20,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2125 Valid, 0 Invalid, 3098 Unknown, 0 Unchecked, 26.42ms Time], IncrementalHoareTripleChecker [46 Valid, 3051 Invalid, 1 Unknown, 0 Unchecked, 26872.34ms Time] [2021-11-04 04:21:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14704 states. [2021-11-04 04:21:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14704 to 14652. [2021-11-04 04:21:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14652 states, 14651 states have (on average 1.4870657293017542) internal successors, (21787), 14651 states have internal predecessors, (21787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:21:21,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14652 states to 14652 states and 21787 transitions. [2021-11-04 04:21:21,194 INFO L78 Accepts]: Start accepts. Automaton has 14652 states and 21787 transitions. Word has length 83 [2021-11-04 04:21:21,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:21:21,195 INFO L470 AbstractCegarLoop]: Abstraction has 14652 states and 21787 transitions. [2021-11-04 04:21:21,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:21:21,195 INFO L276 IsEmpty]: Start isEmpty. Operand 14652 states and 21787 transitions. [2021-11-04 04:21:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-04 04:21:21,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:21:21,207 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:21:21,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-04 04:21:21,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-04 04:21:21,425 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:21:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:21:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2021-11-04 04:21:21,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-04 04:21:21,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237755770] [2021-11-04 04:21:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:21:21,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-04 04:21:21,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-04 04:21:21,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-04 04:21:21,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-04 04:21:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:21:21,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-04 04:21:21,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:21:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:21:22,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 04:21:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:21:22,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-04 04:21:22,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237755770] [2021-11-04 04:21:22,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237755770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-04 04:21:22,304 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:21:22,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-04 04:21:22,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458794677] [2021-11-04 04:21:22,304 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-04 04:21:22,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-04 04:21:22,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-04 04:21:22,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-04 04:21:22,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:21:22,305 INFO L87 Difference]: Start difference. First operand 14652 states and 21787 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:21:34,946 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:21:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:21:56,037 INFO L93 Difference]: Finished difference Result 35452 states and 52856 transitions. [2021-11-04 04:21:56,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-04 04:21:56,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-04 04:21:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:21:56,124 INFO L225 Difference]: With dead ends: 35452 [2021-11-04 04:21:56,125 INFO L226 Difference]: Without dead ends: 27939 [2021-11-04 04:21:56,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.76ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-04 04:21:56,143 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1121 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 3530 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30972.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.03ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3530 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32969.50ms IncrementalHoareTripleChecker+Time [2021-11-04 04:21:56,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 0 Invalid, 3568 Unknown, 0 Unchecked, 22.03ms Time], IncrementalHoareTripleChecker [37 Valid, 3530 Invalid, 1 Unknown, 0 Unchecked, 32969.50ms Time] [2021-11-04 04:21:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27939 states. [2021-11-04 04:21:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27939 to 14844. [2021-11-04 04:21:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14844 states, 14843 states have (on average 1.4807653439331672) internal successors, (21979), 14843 states have internal predecessors, (21979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:21:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14844 states to 14844 states and 21979 transitions. [2021-11-04 04:21:56,735 INFO L78 Accepts]: Start accepts. Automaton has 14844 states and 21979 transitions. Word has length 84 [2021-11-04 04:21:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:21:56,735 INFO L470 AbstractCegarLoop]: Abstraction has 14844 states and 21979 transitions. [2021-11-04 04:21:56,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:21:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 14844 states and 21979 transitions. [2021-11-04 04:21:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-04 04:21:56,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:21:56,744 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:21:56,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-04 04:21:56,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-04 04:21:56,958 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:21:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:21:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2021-11-04 04:21:56,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-04 04:21:56,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652906637] [2021-11-04 04:21:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:21:56,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-04 04:21:56,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-04 04:21:56,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-04 04:21:56,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-04 04:21:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:21:57,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-04 04:21:57,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:21:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:21:58,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 04:21:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:21:58,966 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-04 04:21:58,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652906637] [2021-11-04 04:21:58,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652906637] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-04 04:21:58,966 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:21:58,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-04 04:21:58,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090427907] [2021-11-04 04:21:58,966 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-04 04:21:58,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-04 04:21:58,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-04 04:21:58,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-04 04:21:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-04 04:21:58,967 INFO L87 Difference]: Start difference. First operand 14844 states and 21979 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:22:11,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:22:24,308 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:22:34,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:23:01,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:23:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-04 04:23:15,673 INFO L93 Difference]: Finished difference Result 42462 states and 62981 transitions. [2021-11-04 04:23:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-04 04:23:15,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-04 04:23:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-04 04:23:15,721 INFO L225 Difference]: With dead ends: 42462 [2021-11-04 04:23:15,722 INFO L226 Difference]: Without dead ends: 27671 [2021-11-04 04:23:15,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 156.28ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-04 04:23:15,744 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4326 mSDsluCounter, 5554 mSDsCounter, 0 mSdLazyCounter, 8154 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70993.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4326 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 89.24ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 8154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75490.29ms IncrementalHoareTripleChecker+Time [2021-11-04 04:23:15,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4326 Valid, 0 Invalid, 8213 Unknown, 0 Unchecked, 89.24ms Time], IncrementalHoareTripleChecker [58 Valid, 8154 Invalid, 1 Unknown, 0 Unchecked, 75490.29ms Time] [2021-11-04 04:23:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27671 states. [2021-11-04 04:23:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27671 to 14214. [2021-11-04 04:23:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14214 states, 14213 states have (on average 1.4702736930978682) internal successors, (20897), 14213 states have internal predecessors, (20897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:23:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14214 states to 14214 states and 20897 transitions. [2021-11-04 04:23:16,491 INFO L78 Accepts]: Start accepts. Automaton has 14214 states and 20897 transitions. Word has length 86 [2021-11-04 04:23:16,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-04 04:23:16,492 INFO L470 AbstractCegarLoop]: Abstraction has 14214 states and 20897 transitions. [2021-11-04 04:23:16,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:23:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 14214 states and 20897 transitions. [2021-11-04 04:23:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-04 04:23:16,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-04 04:23:16,515 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-04 04:23:16,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-04 04:23:16,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-04 04:23:16,766 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-04 04:23:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-04 04:23:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash 115550791, now seen corresponding path program 1 times [2021-11-04 04:23:16,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-04 04:23:16,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639435108] [2021-11-04 04:23:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-04 04:23:16,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-04 04:23:16,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-04 04:23:16,769 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-04 04:23:16,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-04 04:23:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-04 04:23:17,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-04 04:23:17,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-04 04:23:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:23:18,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-04 04:23:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-04 04:23:19,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-04 04:23:19,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639435108] [2021-11-04 04:23:19,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639435108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-04 04:23:19,084 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-04 04:23:19,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-04 04:23:19,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623118133] [2021-11-04 04:23:19,084 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-04 04:23:19,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-04 04:23:19,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-04 04:23:19,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-04 04:23:19,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-04 04:23:19,085 INFO L87 Difference]: Start difference. First operand 14214 states and 20897 transitions. Second operand has 12 states, 12 states have (on average 7.833333333333333) internal successors, (94), 12 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-04 04:23:52,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:23:58,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-04 04:24:20,557 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15