./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 4d014703 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-4d01470 [2021-11-02 18:32:30,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 18:32:30,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 18:32:30,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 18:32:30,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 18:32:30,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 18:32:30,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 18:32:30,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 18:32:30,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 18:32:30,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 18:32:30,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 18:32:30,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 18:32:30,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 18:32:30,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 18:32:30,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 18:32:30,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 18:32:30,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 18:32:30,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 18:32:30,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 18:32:30,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 18:32:30,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 18:32:30,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 18:32:30,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 18:32:30,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 18:32:30,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 18:32:30,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 18:32:30,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 18:32:30,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 18:32:30,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 18:32:30,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 18:32:30,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 18:32:30,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 18:32:30,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 18:32:30,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 18:32:30,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 18:32:30,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 18:32:30,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 18:32:30,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 18:32:30,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 18:32:30,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 18:32:30,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 18:32:30,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 18:32:30,589 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 18:32:30,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 18:32:30,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 18:32:30,589 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 18:32:30,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 18:32:30,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 18:32:30,591 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 18:32:30,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 18:32:30,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 18:32:30,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 18:32:30,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 18:32:30,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 18:32:30,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 18:32:30,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 18:32:30,592 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 18:32:30,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 18:32:30,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 18:32:30,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 18:32:30,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 18:32:30,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 18:32:30,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 18:32:30,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 18:32:30,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 18:32:30,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 18:32:30,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 18:32:30,594 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 18:32:30,594 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 18:32:30,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 18:32:30,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 18:32:30,595 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-02 18:32:30,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 18:32:30,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 18:32:30,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 18:32:30,808 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 18:32:30,809 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 18:32:30,810 INFO L432 ainManager$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 [2021-11-02 18:32:30,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9fdaaa8f/13dc58c960694e858a094992cf394087/FLAG0b4c4f581 [2021-11-02 18:32:31,376 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 18:32:31,377 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 [2021-11-02 18:32:31,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9fdaaa8f/13dc58c960694e858a094992cf394087/FLAG0b4c4f581 [2021-11-02 18:32:31,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9fdaaa8f/13dc58c960694e858a094992cf394087 [2021-11-02 18:32:31,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 18:32:31,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 18:32:31,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 18:32:31,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 18:32:31,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 18:32:31,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 06:32:31" (1/1) ... [2021-11-02 18:32:31,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77731c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:31, skipping insertion in model container [2021-11-02 18:32:31,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 06:32:31" (1/1) ... [2021-11-02 18:32:31,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 18:32:31,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 18:32:32,331 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] [2021-11-02 18:32:32,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 18:32:32,664 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 18:32:32,770 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] [2021-11-02 18:32:32,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 18:32:32,940 INFO L208 MainTranslator]: Completed translation [2021-11-02 18:32:32,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32 WrapperNode [2021-11-02 18:32:32,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 18:32:32,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 18:32:32,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 18:32:32,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 18:32:32,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32" (1/1) ... [2021-11-02 18:32:32,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32" (1/1) ... [2021-11-02 18:32:33,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 18:32:33,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 18:32:33,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 18:32:33,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 18:32:33,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32" (1/1) ... [2021-11-02 18:32:33,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32" (1/1) ... [2021-11-02 18:32:33,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32" (1/1) ... [2021-11-02 18:32:33,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32" (1/1) ... [2021-11-02 18:32:33,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32" (1/1) ... [2021-11-02 18:32:33,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32" (1/1) ... [2021-11-02 18:32:33,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32" (1/1) ... [2021-11-02 18:32:33,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 18:32:33,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 18:32:33,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 18:32:33,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 18:32:33,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32" (1/1) ... [2021-11-02 18:32:33,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 18:32:33,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:32:33,288 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) [2021-11-02 18:32:33,304 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 [2021-11-02 18:32:33,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-02 18:32:33,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 18:32:33,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 18:32:33,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 18:32:33,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 18:32:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 18:32:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 18:32:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 18:32:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 18:32:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 18:32:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 18:32:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 18:32:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-02 18:32:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 18:32:33,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 18:32:34,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 18:32:34,401 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2021-11-02 18:32:34,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 06:32:34 BoogieIcfgContainer [2021-11-02 18:32:34,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 18:32:34,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 18:32:34,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 18:32:34,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 18:32:34,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 06:32:31" (1/3) ... [2021-11-02 18:32:34,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d9182c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 06:32:34, skipping insertion in model container [2021-11-02 18:32:34,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:32:32" (2/3) ... [2021-11-02 18:32:34,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d9182c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 06:32:34, skipping insertion in model container [2021-11-02 18:32:34,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 06:32:34" (3/3) ... [2021-11-02 18:32:34,412 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 [2021-11-02 18:32:34,416 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 18:32:34,417 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 18:32:34,460 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 18:32:34,465 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 [2021-11-02 18:32:34,466 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 18:32:34,498 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) [2021-11-02 18:32:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 18:32:34,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:32:34,509 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] [2021-11-02 18:32:34,510 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:32:34,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:32:34,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2021-11-02 18:32:34,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:32:34,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573945855] [2021-11-02 18:32:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:32:34,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:32:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:32:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:32:34,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:32:34,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573945855] [2021-11-02 18:32:34,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573945855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:32:34,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:32:34,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:32:34,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860364747] [2021-11-02 18:32:34,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:32:34,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:32:34,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:32:34,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:32:34,892 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) [2021-11-02 18:32:37,757 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 [] [2021-11-02 18:32:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:32:39,364 INFO L93 Difference]: Finished difference Result 2601 states and 3987 transitions. [2021-11-02 18:32:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:32:39,367 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 [2021-11-02 18:32:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:32:39,391 INFO L225 Difference]: With dead ends: 2601 [2021-11-02 18:32:39,391 INFO L226 Difference]: Without dead ends: 1696 [2021-11-02 18:32:39,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.53ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:32:39,399 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1196 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 2588 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3844.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.47ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4301.80ms IncrementalHoareTripleChecker+Time [2021-11-02 18:32:39,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 8 Invalid, 2592 Unknown, 0 Unchecked, 12.47ms Time], IncrementalHoareTripleChecker [3 Valid, 2588 Invalid, 1 Unknown, 0 Unchecked, 4301.80ms Time] [2021-11-02 18:32:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-11-02 18:32:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1686. [2021-11-02 18:32:39,477 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) [2021-11-02 18:32:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2470 transitions. [2021-11-02 18:32:39,483 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2470 transitions. Word has length 36 [2021-11-02 18:32:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:32:39,484 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 2470 transitions. [2021-11-02 18:32:39,484 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) [2021-11-02 18:32:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2470 transitions. [2021-11-02 18:32:39,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 18:32:39,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:32:39,486 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] [2021-11-02 18:32:39,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 18:32:39,487 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:32:39,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:32:39,487 INFO L85 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2021-11-02 18:32:39,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:32:39,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147691877] [2021-11-02 18:32:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:32:39,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:32:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:32:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:32:39,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:32:39,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147691877] [2021-11-02 18:32:39,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147691877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:32:39,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:32:39,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 18:32:39,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590550190] [2021-11-02 18:32:39,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 18:32:39,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:32:39,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 18:32:39,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:32:39,648 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) [2021-11-02 18:32:42,954 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 [] [2021-11-02 18:32:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:32:44,957 INFO L93 Difference]: Finished difference Result 4943 states and 7275 transitions. [2021-11-02 18:32:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:32:44,968 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 [2021-11-02 18:32:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:32:44,979 INFO L225 Difference]: With dead ends: 4943 [2021-11-02 18:32:44,979 INFO L226 Difference]: Without dead ends: 3304 [2021-11-02 18:32:44,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.28ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 18:32:44,987 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1251 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 5100 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4497.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.05ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5118.83ms IncrementalHoareTripleChecker+Time [2021-11-02 18:32:44,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 0 Invalid, 5103 Unknown, 0 Unchecked, 13.05ms Time], IncrementalHoareTripleChecker [2 Valid, 5100 Invalid, 1 Unknown, 0 Unchecked, 5118.83ms Time] [2021-11-02 18:32:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-11-02 18:32:45,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 3198. [2021-11-02 18:32:45,050 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) [2021-11-02 18:32:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 4726 transitions. [2021-11-02 18:32:45,060 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 4726 transitions. Word has length 40 [2021-11-02 18:32:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:32:45,060 INFO L470 AbstractCegarLoop]: Abstraction has 3198 states and 4726 transitions. [2021-11-02 18:32:45,060 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) [2021-11-02 18:32:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 4726 transitions. [2021-11-02 18:32:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 18:32:45,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:32:45,066 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] [2021-11-02 18:32:45,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 18:32:45,066 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:32:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:32:45,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1564766953, now seen corresponding path program 1 times [2021-11-02 18:32:45,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:32:45,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716648046] [2021-11-02 18:32:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:32:45,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:32:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:32:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:32:45,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:32:45,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716648046] [2021-11-02 18:32:45,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716648046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:32:45,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:32:45,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:32:45,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280412394] [2021-11-02 18:32:45,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:32:45,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:32:45,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:32:45,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:32:45,163 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) [2021-11-02 18:32:48,366 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 [] [2021-11-02 18:32:49,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:32:49,016 INFO L93 Difference]: Finished difference Result 7807 states and 11573 transitions. [2021-11-02 18:32:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:32:49,016 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 [2021-11-02 18:32:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:32:49,030 INFO L225 Difference]: With dead ends: 7807 [2021-11-02 18:32:49,030 INFO L226 Difference]: Without dead ends: 4662 [2021-11-02 18:32:49,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.46ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:32:49,038 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 629 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3391.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.81ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3731.19ms IncrementalHoareTripleChecker+Time [2021-11-02 18:32:49,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 0 Invalid, 2526 Unknown, 0 Unchecked, 3.81ms Time], IncrementalHoareTripleChecker [2 Valid, 2523 Invalid, 1 Unknown, 0 Unchecked, 3731.19ms Time] [2021-11-02 18:32:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2021-11-02 18:32:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 4642. [2021-11-02 18:32:49,107 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) [2021-11-02 18:32:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 6884 transitions. [2021-11-02 18:32:49,116 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 6884 transitions. Word has length 69 [2021-11-02 18:32:49,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:32:49,118 INFO L470 AbstractCegarLoop]: Abstraction has 4642 states and 6884 transitions. [2021-11-02 18:32:49,118 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) [2021-11-02 18:32:49,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 6884 transitions. [2021-11-02 18:32:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 18:32:49,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:32:49,122 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] [2021-11-02 18:32:49,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 18:32:49,122 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:32:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:32:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash 36804616, now seen corresponding path program 1 times [2021-11-02 18:32:49,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:32:49,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582448549] [2021-11-02 18:32:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:32:49,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:32:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:32:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:32:49,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:32:49,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582448549] [2021-11-02 18:32:49,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582448549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:32:49,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:32:49,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:32:49,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534729210] [2021-11-02 18:32:49,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:32:49,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:32:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:32:49,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:32:49,200 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) [2021-11-02 18:32:52,182 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 [] [2021-11-02 18:32:53,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:32:53,228 INFO L93 Difference]: Finished difference Result 11045 states and 16385 transitions. [2021-11-02 18:32:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:32:53,229 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 [2021-11-02 18:32:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:32:53,247 INFO L225 Difference]: With dead ends: 11045 [2021-11-02 18:32:53,247 INFO L226 Difference]: Without dead ends: 6456 [2021-11-02 18:32:53,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.31ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:32:53,255 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 738 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 3170 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3487.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.18ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3897.33ms IncrementalHoareTripleChecker+Time [2021-11-02 18:32:53,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 0 Invalid, 3173 Unknown, 0 Unchecked, 3.18ms Time], IncrementalHoareTripleChecker [2 Valid, 3170 Invalid, 1 Unknown, 0 Unchecked, 3897.33ms Time] [2021-11-02 18:32:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6456 states. [2021-11-02 18:32:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6456 to 6438. [2021-11-02 18:32:53,370 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) [2021-11-02 18:32:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 9538 transitions. [2021-11-02 18:32:53,381 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 9538 transitions. Word has length 75 [2021-11-02 18:32:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:32:53,382 INFO L470 AbstractCegarLoop]: Abstraction has 6438 states and 9538 transitions. [2021-11-02 18:32:53,382 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) [2021-11-02 18:32:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 9538 transitions. [2021-11-02 18:32:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 18:32:53,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:32:53,387 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] [2021-11-02 18:32:53,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 18:32:53,388 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:32:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:32:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2021-11-02 18:32:53,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:32:53,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007951560] [2021-11-02 18:32:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:32:53,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:32:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:32:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:32:53,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:32:53,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007951560] [2021-11-02 18:32:53,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007951560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:32:53,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:32:53,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:32:53,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425559879] [2021-11-02 18:32:53,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:32:53,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:32:53,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:32:53,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:32:53,479 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) [2021-11-02 18:32:56,067 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 [] [2021-11-02 18:32:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:32:57,302 INFO L93 Difference]: Finished difference Result 14546 states and 21659 transitions. [2021-11-02 18:32:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:32:57,302 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 [2021-11-02 18:32:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:32:57,324 INFO L225 Difference]: With dead ends: 14546 [2021-11-02 18:32:57,324 INFO L226 Difference]: Without dead ends: 8161 [2021-11-02 18:32:57,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.27ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:32:57,334 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 754 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3349.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3688.14ms IncrementalHoareTripleChecker+Time [2021-11-02 18:32:57,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 0 Invalid, 2466 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [20 Valid, 2445 Invalid, 1 Unknown, 0 Unchecked, 3688.14ms Time] [2021-11-02 18:32:57,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8161 states. [2021-11-02 18:32:57,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8161 to 8141. [2021-11-02 18:32:57,520 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) [2021-11-02 18:32:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8141 states to 8141 states and 12058 transitions. [2021-11-02 18:32:57,540 INFO L78 Accepts]: Start accepts. Automaton has 8141 states and 12058 transitions. Word has length 83 [2021-11-02 18:32:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:32:57,541 INFO L470 AbstractCegarLoop]: Abstraction has 8141 states and 12058 transitions. [2021-11-02 18:32:57,541 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) [2021-11-02 18:32:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 8141 states and 12058 transitions. [2021-11-02 18:32:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 18:32:57,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:32:57,546 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] [2021-11-02 18:32:57,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 18:32:57,546 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:32:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:32:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2021-11-02 18:32:57,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:32:57,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988899987] [2021-11-02 18:32:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:32:57,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:32:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:32:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:32:57,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:32:57,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988899987] [2021-11-02 18:32:57,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988899987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:32:57,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:32:57,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:32:57,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129302640] [2021-11-02 18:32:57,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:32:57,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:32:57,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:32:57,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:32:57,618 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) [2021-11-02 18:33:00,380 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 [] [2021-11-02 18:33:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:33:02,379 INFO L93 Difference]: Finished difference Result 19629 states and 29162 transitions. [2021-11-02 18:33:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:33:02,382 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 [2021-11-02 18:33:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:33:02,420 INFO L225 Difference]: With dead ends: 19629 [2021-11-02 18:33:02,420 INFO L226 Difference]: Without dead ends: 15459 [2021-11-02 18:33:02,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.60ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:33:02,431 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1121 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 3530 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4042.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.35ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3530 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4542.83ms IncrementalHoareTripleChecker+Time [2021-11-02 18:33:02,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 0 Invalid, 3568 Unknown, 0 Unchecked, 6.35ms Time], IncrementalHoareTripleChecker [37 Valid, 3530 Invalid, 1 Unknown, 0 Unchecked, 4542.83ms Time] [2021-11-02 18:33:02,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15459 states. [2021-11-02 18:33:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15459 to 8253. [2021-11-02 18:33:02,665 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) [2021-11-02 18:33:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8253 states to 8253 states and 12170 transitions. [2021-11-02 18:33:02,678 INFO L78 Accepts]: Start accepts. Automaton has 8253 states and 12170 transitions. Word has length 84 [2021-11-02 18:33:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:33:02,679 INFO L470 AbstractCegarLoop]: Abstraction has 8253 states and 12170 transitions. [2021-11-02 18:33:02,679 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) [2021-11-02 18:33:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 8253 states and 12170 transitions. [2021-11-02 18:33:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 18:33:02,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:33:02,687 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] [2021-11-02 18:33:02,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 18:33:02,688 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:33:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:33:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2021-11-02 18:33:02,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:33:02,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58787857] [2021-11-02 18:33:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:33:02,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:33:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:33:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:33:02,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:33:02,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58787857] [2021-11-02 18:33:02,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58787857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:33:02,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:33:02,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:33:02,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386784186] [2021-11-02 18:33:02,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:33:02,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:33:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:33:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:33:02,780 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) [2021-11-02 18:33:05,458 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 [] [2021-11-02 18:33:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:33:08,351 INFO L93 Difference]: Finished difference Result 19855 states and 29315 transitions. [2021-11-02 18:33:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 18:33:08,351 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 [2021-11-02 18:33:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:33:08,373 INFO L225 Difference]: With dead ends: 19855 [2021-11-02 18:33:08,373 INFO L226 Difference]: Without dead ends: 11655 [2021-11-02 18:33:08,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.29ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:33:08,387 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2190 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 4638 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4625.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2190 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.68ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4638 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5287.69ms IncrementalHoareTripleChecker+Time [2021-11-02 18:33:08,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2190 Valid, 0 Invalid, 4662 Unknown, 0 Unchecked, 9.68ms Time], IncrementalHoareTripleChecker [23 Valid, 4638 Invalid, 1 Unknown, 0 Unchecked, 5287.69ms Time] [2021-11-02 18:33:08,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11655 states. [2021-11-02 18:33:08,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11655 to 8085. [2021-11-02 18:33:08,572 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) [2021-11-02 18:33:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 11834 transitions. [2021-11-02 18:33:08,585 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 11834 transitions. Word has length 86 [2021-11-02 18:33:08,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:33:08,585 INFO L470 AbstractCegarLoop]: Abstraction has 8085 states and 11834 transitions. [2021-11-02 18:33:08,585 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) [2021-11-02 18:33:08,586 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 11834 transitions. [2021-11-02 18:33:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 18:33:08,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:33:08,591 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] [2021-11-02 18:33:08,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 18:33:08,592 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:33:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:33:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash 115550791, now seen corresponding path program 1 times [2021-11-02 18:33:08,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:33:08,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605606831] [2021-11-02 18:33:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:33:08,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:33:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:33:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:33:08,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:33:08,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605606831] [2021-11-02 18:33:08,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605606831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 18:33:08,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739000748] [2021-11-02 18:33:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:33:08,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 18:33:08,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:33:08,710 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) [2021-11-02 18:33:08,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 18:33:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:33:09,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 18:33:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:33:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:33:09,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 18:33:09,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739000748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:33:09,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 18:33:09,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-02 18:33:09,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045590993] [2021-11-02 18:33:09,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:33:09,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:33:09,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:33:09,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:33:09,238 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) [2021-11-02 18:33:12,056 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 [] [2021-11-02 18:33:14,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:33:14,974 INFO L93 Difference]: Finished difference Result 17728 states and 25982 transitions. [2021-11-02 18:33:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 18:33:14,975 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 [2021-11-02 18:33:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:33:15,011 INFO L225 Difference]: With dead ends: 17728 [2021-11-02 18:33:15,012 INFO L226 Difference]: Without dead ends: 17720 [2021-11-02 18:33:15,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.34ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:33:15,020 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2443 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 4497 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4790.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2443 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.55ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 4497 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5432.79ms IncrementalHoareTripleChecker+Time [2021-11-02 18:33:15,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2443 Valid, 0 Invalid, 4502 Unknown, 0 Unchecked, 8.55ms Time], IncrementalHoareTripleChecker [4 Valid, 4497 Invalid, 1 Unknown, 0 Unchecked, 5432.79ms Time] [2021-11-02 18:33:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17720 states. [2021-11-02 18:33:15,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17720 to 16377. [2021-11-02 18:33:15,348 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) [2021-11-02 18:33:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16377 states to 16377 states and 24060 transitions. [2021-11-02 18:33:15,434 INFO L78 Accepts]: Start accepts. Automaton has 16377 states and 24060 transitions. Word has length 89 [2021-11-02 18:33:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:33:15,435 INFO L470 AbstractCegarLoop]: Abstraction has 16377 states and 24060 transitions. [2021-11-02 18:33:15,435 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) [2021-11-02 18:33:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 16377 states and 24060 transitions. [2021-11-02 18:33:15,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 18:33:15,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:33:15,441 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] [2021-11-02 18:33:15,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 18:33:15,651 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 [2021-11-02 18:33:15,651 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:33:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:33:15,652 INFO L85 PathProgramCache]: Analyzing trace with hash -895566459, now seen corresponding path program 1 times [2021-11-02 18:33:15,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:33:15,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067418883] [2021-11-02 18:33:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:33:15,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:33:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:33:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:33:15,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:33:15,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067418883] [2021-11-02 18:33:15,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067418883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:33:15,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:33:15,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:33:15,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786371534] [2021-11-02 18:33:15,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:33:15,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:33:15,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:33:15,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:33:15,738 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) [2021-11-02 18:33:18,568 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 [] [2021-11-02 18:33:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:33:21,713 INFO L93 Difference]: Finished difference Result 46501 states and 68341 transitions. [2021-11-02 18:33:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:33:21,714 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 [2021-11-02 18:33:21,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:33:21,816 INFO L225 Difference]: With dead ends: 46501 [2021-11-02 18:33:21,817 INFO L226 Difference]: Without dead ends: 33983 [2021-11-02 18:33:21,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.61ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:33:21,833 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2604 mSDsluCounter, 2518 mSDsCounter, 0 mSdLazyCounter, 4889 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4761.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2604 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4889 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5391.77ms IncrementalHoareTripleChecker+Time [2021-11-02 18:33:21,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2604 Valid, 0 Invalid, 4892 Unknown, 0 Unchecked, 12.51ms Time], IncrementalHoareTripleChecker [2 Valid, 4889 Invalid, 1 Unknown, 0 Unchecked, 5391.77ms Time] [2021-11-02 18:33:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33983 states. [2021-11-02 18:33:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33983 to 16381. [2021-11-02 18:33:22,319 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) [2021-11-02 18:33:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16381 states to 16381 states and 24064 transitions. [2021-11-02 18:33:22,347 INFO L78 Accepts]: Start accepts. Automaton has 16381 states and 24064 transitions. Word has length 89 [2021-11-02 18:33:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:33:22,348 INFO L470 AbstractCegarLoop]: Abstraction has 16381 states and 24064 transitions. [2021-11-02 18:33:22,348 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) [2021-11-02 18:33:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 16381 states and 24064 transitions. [2021-11-02 18:33:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-02 18:33:22,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:33:22,354 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] [2021-11-02 18:33:22,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 18:33:22,354 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:33:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:33:22,355 INFO L85 PathProgramCache]: Analyzing trace with hash 666379044, now seen corresponding path program 1 times [2021-11-02 18:33:22,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:33:22,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517222464] [2021-11-02 18:33:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:33:22,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:33:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:33:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 18:33:22,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:33:22,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517222464] [2021-11-02 18:33:22,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517222464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:33:22,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:33:22,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 18:33:22,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413775433] [2021-11-02 18:33:22,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 18:33:22,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:33:22,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 18:33:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:33:22,480 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) [2021-11-02 18:33:25,326 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 [] [2021-11-02 18:33:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:33:27,961 INFO L93 Difference]: Finished difference Result 41423 states and 60957 transitions. [2021-11-02 18:33:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:33:27,962 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 [2021-11-02 18:33:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:33:28,009 INFO L225 Difference]: With dead ends: 41423 [2021-11-02 18:33:28,009 INFO L226 Difference]: Without dead ends: 28895 [2021-11-02 18:33:28,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.49ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 18:33:28,032 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1214 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 5100 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4397.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.96ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4936.08ms IncrementalHoareTripleChecker+Time [2021-11-02 18:33:28,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 0 Invalid, 5103 Unknown, 0 Unchecked, 8.96ms Time], IncrementalHoareTripleChecker [2 Valid, 5100 Invalid, 1 Unknown, 0 Unchecked, 4936.08ms Time] [2021-11-02 18:33:28,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28895 states. [2021-11-02 18:33:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28895 to 28251. [2021-11-02 18:33:28,680 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) [2021-11-02 18:33:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28251 states to 28251 states and 41654 transitions. [2021-11-02 18:33:28,727 INFO L78 Accepts]: Start accepts. Automaton has 28251 states and 41654 transitions. Word has length 91 [2021-11-02 18:33:28,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:33:28,728 INFO L470 AbstractCegarLoop]: Abstraction has 28251 states and 41654 transitions. [2021-11-02 18:33:28,728 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) [2021-11-02 18:33:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 28251 states and 41654 transitions. [2021-11-02 18:33:28,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-02 18:33:28,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:33:28,749 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] [2021-11-02 18:33:28,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 18:33:28,750 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:33:28,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:33:28,750 INFO L85 PathProgramCache]: Analyzing trace with hash 405018673, now seen corresponding path program 1 times [2021-11-02 18:33:28,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:33:28,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198060705] [2021-11-02 18:33:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:33:28,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:33:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:33:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 18:33:28,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:33:28,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198060705] [2021-11-02 18:33:28,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198060705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:33:28,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:33:28,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:33:28,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79622618] [2021-11-02 18:33:28,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:33:28,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:33:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:33:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:33:28,934 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) [2021-11-02 18:33:31,605 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 [] [2021-11-02 18:33:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:33:35,152 INFO L93 Difference]: Finished difference Result 66351 states and 98063 transitions. [2021-11-02 18:33:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 18:33:35,161 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 [2021-11-02 18:33:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:33:35,230 INFO L225 Difference]: With dead ends: 66351 [2021-11-02 18:33:35,231 INFO L226 Difference]: Without dead ends: 41955 [2021-11-02 18:33:35,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.28ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:33:35,257 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2170 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 4646 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4697.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2170 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.03ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4646 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5279.47ms IncrementalHoareTripleChecker+Time [2021-11-02 18:33:35,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2170 Valid, 0 Invalid, 4670 Unknown, 0 Unchecked, 8.03ms Time], IncrementalHoareTripleChecker [23 Valid, 4646 Invalid, 1 Unknown, 0 Unchecked, 5279.47ms Time] [2021-11-02 18:33:35,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41955 states. [2021-11-02 18:33:35,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41955 to 22065. [2021-11-02 18:33:35,869 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) [2021-11-02 18:33:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22065 states to 22065 states and 32378 transitions. [2021-11-02 18:33:35,900 INFO L78 Accepts]: Start accepts. Automaton has 22065 states and 32378 transitions. Word has length 120 [2021-11-02 18:33:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:33:35,901 INFO L470 AbstractCegarLoop]: Abstraction has 22065 states and 32378 transitions. [2021-11-02 18:33:35,901 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) [2021-11-02 18:33:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 22065 states and 32378 transitions. [2021-11-02 18:33:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 18:33:35,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:33:35,911 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] [2021-11-02 18:33:35,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 18:33:35,912 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:33:35,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:33:35,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1507540082, now seen corresponding path program 1 times [2021-11-02 18:33:35,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:33:35,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147330827] [2021-11-02 18:33:35,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:33:35,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:33:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:33:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 18:33:35,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:33:35,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147330827] [2021-11-02 18:33:35,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147330827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:33:35,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:33:35,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:33:35,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231973789] [2021-11-02 18:33:35,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:33:35,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:33:35,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:33:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:33:35,960 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) [2021-11-02 18:33:38,956 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 [] [2021-11-02 18:33:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:33:41,180 INFO L93 Difference]: Finished difference Result 50475 states and 73944 transitions. [2021-11-02 18:33:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:33:41,181 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 [2021-11-02 18:33:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:33:41,224 INFO L225 Difference]: With dead ends: 50475 [2021-11-02 18:33:41,224 INFO L226 Difference]: Without dead ends: 28463 [2021-11-02 18:33:41,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.75ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:33:41,249 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1514 mSDsluCounter, 2591 mSDsCounter, 0 mSdLazyCounter, 4661 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4115.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.85ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4661 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4576.04ms IncrementalHoareTripleChecker+Time [2021-11-02 18:33:41,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1514 Valid, 0 Invalid, 4662 Unknown, 0 Unchecked, 7.85ms Time], IncrementalHoareTripleChecker [0 Valid, 4661 Invalid, 1 Unknown, 0 Unchecked, 4576.04ms Time] [2021-11-02 18:33:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28463 states. [2021-11-02 18:33:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28463 to 22105. [2021-11-02 18:33:41,836 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) [2021-11-02 18:33:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22105 states to 22105 states and 32418 transitions. [2021-11-02 18:33:41,867 INFO L78 Accepts]: Start accepts. Automaton has 22105 states and 32418 transitions. Word has length 123 [2021-11-02 18:33:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:33:41,867 INFO L470 AbstractCegarLoop]: Abstraction has 22105 states and 32418 transitions. [2021-11-02 18:33:41,867 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) [2021-11-02 18:33:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 22105 states and 32418 transitions. [2021-11-02 18:33:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-02 18:33:41,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:33:41,878 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] [2021-11-02 18:33:41,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 18:33:41,879 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:33:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:33:41,879 INFO L85 PathProgramCache]: Analyzing trace with hash -160571663, now seen corresponding path program 1 times [2021-11-02 18:33:41,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:33:41,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141753390] [2021-11-02 18:33:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:33:41,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:33:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:33:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 18:33:41,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:33:41,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141753390] [2021-11-02 18:33:41,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141753390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:33:41,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:33:41,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 18:33:41,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476924107] [2021-11-02 18:33:41,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:33:41,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:33:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:33:41,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:33:41,942 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) [2021-11-02 18:33:44,902 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 [] [2021-11-02 18:33:50,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:33:50,493 INFO L93 Difference]: Finished difference Result 104726 states and 153705 transitions. [2021-11-02 18:33:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:33:50,493 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 [2021-11-02 18:33:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:33:50,641 INFO L225 Difference]: With dead ends: 104726 [2021-11-02 18:33:50,641 INFO L226 Difference]: Without dead ends: 82674 [2021-11-02 18:33:50,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.28ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:33:50,683 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3636 mSDsluCounter, 3838 mSDsCounter, 0 mSdLazyCounter, 6459 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5930.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3636 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.93ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 6459 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6749.85ms IncrementalHoareTripleChecker+Time [2021-11-02 18:33:50,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3636 Valid, 0 Invalid, 6473 Unknown, 0 Unchecked, 15.93ms Time], IncrementalHoareTripleChecker [13 Valid, 6459 Invalid, 1 Unknown, 0 Unchecked, 6749.85ms Time] [2021-11-02 18:33:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82674 states. [2021-11-02 18:33:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82674 to 22153. [2021-11-02 18:33:51,685 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) [2021-11-02 18:33:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22153 states to 22153 states and 32466 transitions. [2021-11-02 18:33:51,723 INFO L78 Accepts]: Start accepts. Automaton has 22153 states and 32466 transitions. Word has length 130 [2021-11-02 18:33:51,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:33:51,723 INFO L470 AbstractCegarLoop]: Abstraction has 22153 states and 32466 transitions. [2021-11-02 18:33:51,723 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) [2021-11-02 18:33:51,723 INFO L276 IsEmpty]: Start isEmpty. Operand 22153 states and 32466 transitions. [2021-11-02 18:33:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-02 18:33:51,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:33:51,736 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] [2021-11-02 18:33:51,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 18:33:51,736 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:33:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:33:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1667112008, now seen corresponding path program 1 times [2021-11-02 18:33:51,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:33:51,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18632171] [2021-11-02 18:33:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:33:51,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:33:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:33:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 18:33:51,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:33:51,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18632171] [2021-11-02 18:33:51,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18632171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:33:51,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:33:51,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:33:51,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797285847] [2021-11-02 18:33:51,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:33:51,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:33:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:33:51,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:33:51,813 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) [2021-11-02 18:33:54,365 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 [] [2021-11-02 18:33:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:33:57,164 INFO L93 Difference]: Finished difference Result 52884 states and 77527 transitions. [2021-11-02 18:33:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:33:57,164 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 [2021-11-02 18:33:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:33:57,214 INFO L225 Difference]: With dead ends: 52884 [2021-11-02 18:33:57,214 INFO L226 Difference]: Without dead ends: 29685 [2021-11-02 18:33:57,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.44ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:33:57,242 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1126 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3763.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.79ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4179.37ms IncrementalHoareTripleChecker+Time [2021-11-02 18:33:57,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 0 Invalid, 2587 Unknown, 0 Unchecked, 4.79ms Time], IncrementalHoareTripleChecker [2 Valid, 2584 Invalid, 1 Unknown, 0 Unchecked, 4179.37ms Time] [2021-11-02 18:33:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29685 states. [2021-11-02 18:33:58,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29685 to 29645. [2021-11-02 18:33:58,147 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) [2021-11-02 18:33:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29645 states to 29645 states and 43410 transitions. [2021-11-02 18:33:58,190 INFO L78 Accepts]: Start accepts. Automaton has 29645 states and 43410 transitions. Word has length 133 [2021-11-02 18:33:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:33:58,190 INFO L470 AbstractCegarLoop]: Abstraction has 29645 states and 43410 transitions. [2021-11-02 18:33:58,191 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) [2021-11-02 18:33:58,191 INFO L276 IsEmpty]: Start isEmpty. Operand 29645 states and 43410 transitions. [2021-11-02 18:33:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-02 18:33:58,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:33:58,206 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] [2021-11-02 18:33:58,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 18:33:58,207 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:33:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:33:58,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1364297893, now seen corresponding path program 1 times [2021-11-02 18:33:58,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:33:58,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740205691] [2021-11-02 18:33:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:33:58,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:33:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:33:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 18:33:58,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:33:58,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740205691] [2021-11-02 18:33:58,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740205691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:33:58,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:33:58,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 18:33:58,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996526491] [2021-11-02 18:33:58,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 18:33:58,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:33:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 18:33:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:33:58,287 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) [2021-11-02 18:34:01,542 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 [] [2021-11-02 18:34:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:34:05,872 INFO L93 Difference]: Finished difference Result 73366 states and 107187 transitions. [2021-11-02 18:34:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 18:34:05,872 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 [2021-11-02 18:34:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:34:05,947 INFO L225 Difference]: With dead ends: 73366 [2021-11-02 18:34:05,947 INFO L226 Difference]: Without dead ends: 43774 [2021-11-02 18:34:05,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.75ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 18:34:05,983 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2274 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 7425 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5294.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2274 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.42ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5992.91ms IncrementalHoareTripleChecker+Time [2021-11-02 18:34:05,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2274 Valid, 0 Invalid, 7427 Unknown, 0 Unchecked, 14.42ms Time], IncrementalHoareTripleChecker [1 Valid, 7425 Invalid, 1 Unknown, 0 Unchecked, 5992.91ms Time] [2021-11-02 18:34:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43774 states. [2021-11-02 18:34:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43774 to 25208. [2021-11-02 18:34:07,154 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) [2021-11-02 18:34:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25208 states to 25208 states and 36890 transitions. [2021-11-02 18:34:07,194 INFO L78 Accepts]: Start accepts. Automaton has 25208 states and 36890 transitions. Word has length 141 [2021-11-02 18:34:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:34:07,194 INFO L470 AbstractCegarLoop]: Abstraction has 25208 states and 36890 transitions. [2021-11-02 18:34:07,194 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) [2021-11-02 18:34:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 25208 states and 36890 transitions. [2021-11-02 18:34:07,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-02 18:34:07,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:34:07,205 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] [2021-11-02 18:34:07,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 18:34:07,205 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:34:07,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:34:07,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1536352515, now seen corresponding path program 1 times [2021-11-02 18:34:07,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:34:07,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874359131] [2021-11-02 18:34:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:34:07,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:34:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:34:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 18:34:07,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:34:07,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874359131] [2021-11-02 18:34:07,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874359131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:34:07,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:34:07,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:34:07,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829556813] [2021-11-02 18:34:07,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:34:07,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:34:07,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:34:07,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:34:07,362 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) [2021-11-02 18:34:09,826 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 [] [2021-11-02 18:34:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:34:11,494 INFO L93 Difference]: Finished difference Result 38154 states and 55878 transitions. [2021-11-02 18:34:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:34:11,495 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 [2021-11-02 18:34:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:34:11,515 INFO L225 Difference]: With dead ends: 38154 [2021-11-02 18:34:11,515 INFO L226 Difference]: Without dead ends: 12999 [2021-11-02 18:34:11,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.22ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:34:11,538 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 731 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3291.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.97ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3612.38ms IncrementalHoareTripleChecker+Time [2021-11-02 18:34:11,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 0 Invalid, 2493 Unknown, 0 Unchecked, 2.97ms Time], IncrementalHoareTripleChecker [17 Valid, 2475 Invalid, 1 Unknown, 0 Unchecked, 3612.38ms Time] [2021-11-02 18:34:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12999 states. [2021-11-02 18:34:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12999 to 11314. [2021-11-02 18:34:11,923 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) [2021-11-02 18:34:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11314 states to 11314 states and 16493 transitions. [2021-11-02 18:34:11,939 INFO L78 Accepts]: Start accepts. Automaton has 11314 states and 16493 transitions. Word has length 146 [2021-11-02 18:34:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:34:11,939 INFO L470 AbstractCegarLoop]: Abstraction has 11314 states and 16493 transitions. [2021-11-02 18:34:11,940 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) [2021-11-02 18:34:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 11314 states and 16493 transitions. [2021-11-02 18:34:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-02 18:34:11,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:34:11,945 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] [2021-11-02 18:34:11,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 18:34:11,946 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:34:11,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:34:11,946 INFO L85 PathProgramCache]: Analyzing trace with hash -290010734, now seen corresponding path program 1 times [2021-11-02 18:34:11,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:34:11,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569423954] [2021-11-02 18:34:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:34:11,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:34:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:34:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 18:34:12,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:34:12,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569423954] [2021-11-02 18:34:12,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569423954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:34:12,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:34:12,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 18:34:12,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171736803] [2021-11-02 18:34:12,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:34:12,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:34:12,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:34:12,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:34:12,065 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) [2021-11-02 18:34:14,604 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 [] [2021-11-02 18:34:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:34:15,561 INFO L93 Difference]: Finished difference Result 16585 states and 24185 transitions. [2021-11-02 18:34:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:34:15,562 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 [2021-11-02 18:34:15,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:34:15,567 INFO L225 Difference]: With dead ends: 16585 [2021-11-02 18:34:15,567 INFO L226 Difference]: Without dead ends: 4582 [2021-11-02 18:34:15,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.67ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:34:15,572 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1120 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2950.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3180.69ms IncrementalHoareTripleChecker+Time [2021-11-02 18:34:15,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 0 Invalid, 1405 Unknown, 0 Unchecked, 1.97ms Time], IncrementalHoareTripleChecker [1 Valid, 1403 Invalid, 1 Unknown, 0 Unchecked, 3180.69ms Time] [2021-11-02 18:34:15,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-11-02 18:34:15,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4005. [2021-11-02 18:34:15,698 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) [2021-11-02 18:34:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 5801 transitions. [2021-11-02 18:34:15,703 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 5801 transitions. Word has length 148 [2021-11-02 18:34:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:34:15,703 INFO L470 AbstractCegarLoop]: Abstraction has 4005 states and 5801 transitions. [2021-11-02 18:34:15,704 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) [2021-11-02 18:34:15,704 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 5801 transitions. [2021-11-02 18:34:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-02 18:34:15,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:34:15,706 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] [2021-11-02 18:34:15,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 18:34:15,706 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:34:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:34:15,707 INFO L85 PathProgramCache]: Analyzing trace with hash 527780847, now seen corresponding path program 1 times [2021-11-02 18:34:15,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:34:15,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375475333] [2021-11-02 18:34:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:34:15,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:34:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:34:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 18:34:15,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:34:15,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375475333] [2021-11-02 18:34:15,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375475333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:34:15,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:34:15,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 18:34:15,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374106281] [2021-11-02 18:34:15,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 18:34:15,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:34:15,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 18:34:15,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 18:34:15,915 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) [2021-11-02 18:34:19,518 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 [] [2021-11-02 18:34:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:34:25,282 INFO L93 Difference]: Finished difference Result 15401 states and 22385 transitions. [2021-11-02 18:34:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 18:34:25,283 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 [2021-11-02 18:34:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:34:25,299 INFO L225 Difference]: With dead ends: 15401 [2021-11-02 18:34:25,300 INFO L226 Difference]: Without dead ends: 11482 [2021-11-02 18:34:25,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.18ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-02 18:34:25,308 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 7613 mSDsluCounter, 11110 mSDsCounter, 0 mSdLazyCounter, 13612 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7515.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7613 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 13615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13612 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8646.98ms IncrementalHoareTripleChecker+Time [2021-11-02 18:34:25,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7613 Valid, 0 Invalid, 13615 Unknown, 0 Unchecked, 26.76ms Time], IncrementalHoareTripleChecker [2 Valid, 13612 Invalid, 1 Unknown, 0 Unchecked, 8646.98ms Time] [2021-11-02 18:34:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-11-02 18:34:25,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 4035. [2021-11-02 18:34:25,511 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) [2021-11-02 18:34:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 5831 transitions. [2021-11-02 18:34:25,515 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 5831 transitions. Word has length 156 [2021-11-02 18:34:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:34:25,515 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 5831 transitions. [2021-11-02 18:34:25,515 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) [2021-11-02 18:34:25,516 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 5831 transitions. [2021-11-02 18:34:25,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-02 18:34:25,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:34:25,518 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] [2021-11-02 18:34:25,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 18:34:25,518 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:34:25,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:34:25,519 INFO L85 PathProgramCache]: Analyzing trace with hash 972368043, now seen corresponding path program 1 times [2021-11-02 18:34:25,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:34:25,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148193041] [2021-11-02 18:34:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:34:25,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:34:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:34:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 18:34:25,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:34:25,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148193041] [2021-11-02 18:34:25,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148193041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:34:25,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:34:25,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 18:34:25,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491227825] [2021-11-02 18:34:25,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 18:34:25,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:34:25,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 18:34:25,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 18:34:25,661 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) [2021-11-02 18:34:29,755 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 [] [2021-11-02 18:34:39,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:34:39,079 INFO L93 Difference]: Finished difference Result 26936 states and 39003 transitions. [2021-11-02 18:34:39,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 18:34:39,080 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 [2021-11-02 18:34:39,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:34:39,112 INFO L225 Difference]: With dead ends: 26936 [2021-11-02 18:34:39,112 INFO L226 Difference]: Without dead ends: 22987 [2021-11-02 18:34:39,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 87.17ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-02 18:34:39,126 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 6814 mSDsluCounter, 13483 mSDsCounter, 0 mSdLazyCounter, 17751 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10232.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6814 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 17783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.27ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 17751 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11860.58ms IncrementalHoareTripleChecker+Time [2021-11-02 18:34:39,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6814 Valid, 0 Invalid, 17783 Unknown, 0 Unchecked, 42.27ms Time], IncrementalHoareTripleChecker [31 Valid, 17751 Invalid, 1 Unknown, 0 Unchecked, 11860.58ms Time] [2021-11-02 18:34:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22987 states. [2021-11-02 18:34:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22987 to 8028. [2021-11-02 18:34:39,619 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) [2021-11-02 18:34:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8028 states to 8028 states and 11595 transitions. [2021-11-02 18:34:39,631 INFO L78 Accepts]: Start accepts. Automaton has 8028 states and 11595 transitions. Word has length 158 [2021-11-02 18:34:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:34:39,631 INFO L470 AbstractCegarLoop]: Abstraction has 8028 states and 11595 transitions. [2021-11-02 18:34:39,631 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) [2021-11-02 18:34:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 8028 states and 11595 transitions. [2021-11-02 18:34:39,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-02 18:34:39,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:34:39,637 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] [2021-11-02 18:34:39,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 18:34:39,637 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:34:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:34:39,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1848387049, now seen corresponding path program 1 times [2021-11-02 18:34:39,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:34:39,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752666184] [2021-11-02 18:34:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:34:39,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:34:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:34:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 18:34:39,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:34:39,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752666184] [2021-11-02 18:34:39,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752666184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:34:39,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:34:39,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 18:34:39,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685874197] [2021-11-02 18:34:39,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 18:34:39,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:34:39,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 18:34:39,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:34:39,839 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) [2021-11-02 18:34:43,524 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 [] [2021-11-02 18:34:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:34:51,058 INFO L93 Difference]: Finished difference Result 35388 states and 51219 transitions. [2021-11-02 18:34:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 18:34:51,059 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 [2021-11-02 18:34:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:34:51,104 INFO L225 Difference]: With dead ends: 35388 [2021-11-02 18:34:51,104 INFO L226 Difference]: Without dead ends: 27506 [2021-11-02 18:34:51,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.53ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 18:34:51,124 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3573 mSDsluCounter, 6639 mSDsCounter, 0 mSdLazyCounter, 10094 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8215.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3573 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.55ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10094 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9359.09ms IncrementalHoareTripleChecker+Time [2021-11-02 18:34:51,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3573 Valid, 0 Invalid, 10102 Unknown, 0 Unchecked, 20.55ms Time], IncrementalHoareTripleChecker [7 Valid, 10094 Invalid, 1 Unknown, 0 Unchecked, 9359.09ms Time] [2021-11-02 18:34:51,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27506 states. [2021-11-02 18:34:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27506 to 8060. [2021-11-02 18:34:51,711 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) [2021-11-02 18:34:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8060 states to 8060 states and 11627 transitions. [2021-11-02 18:34:51,721 INFO L78 Accepts]: Start accepts. Automaton has 8060 states and 11627 transitions. Word has length 158 [2021-11-02 18:34:51,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:34:51,721 INFO L470 AbstractCegarLoop]: Abstraction has 8060 states and 11627 transitions. [2021-11-02 18:34:51,721 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) [2021-11-02 18:34:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 8060 states and 11627 transitions. [2021-11-02 18:34:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-02 18:34:51,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:34:51,727 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] [2021-11-02 18:34:51,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 18:34:51,727 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:34:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:34:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash -622349658, now seen corresponding path program 1 times [2021-11-02 18:34:51,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:34:51,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740193705] [2021-11-02 18:34:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:34:51,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:34:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:34:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:34:53,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:34:53,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740193705] [2021-11-02 18:34:53,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740193705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 18:34:53,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952817986] [2021-11-02 18:34:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:34:53,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 18:34:53,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:34:53,172 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) [2021-11-02 18:34:53,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 18:34:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:34:53,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-02 18:34:53,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:34:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 18:34:54,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:34:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 18:34:55,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952817986] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-02 18:34:55,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-02 18:34:55,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [23, 15] total 44 [2021-11-02 18:34:55,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434962216] [2021-11-02 18:34:55,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 18:34:55,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:34:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 18:34:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 18:34:55,170 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) [2021-11-02 18:35:01,035 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 [] [2021-11-02 18:35:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:35:14,574 INFO L93 Difference]: Finished difference Result 40008 states and 57859 transitions. [2021-11-02 18:35:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 18:35:14,575 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 [2021-11-02 18:35:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:35:14,614 INFO L225 Difference]: With dead ends: 40008 [2021-11-02 18:35:14,615 INFO L226 Difference]: Without dead ends: 32094 [2021-11-02 18:35:14,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1301.08ms TimeCoverageRelationStatistics Valid=158, Invalid=2194, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 18:35:14,626 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 11535 mSDsluCounter, 19275 mSDsCounter, 0 mSdLazyCounter, 23638 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14292.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11535 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 55.34ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 23638 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16433.04ms IncrementalHoareTripleChecker+Time [2021-11-02 18:35:14,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11535 Valid, 0 Invalid, 23678 Unknown, 0 Unchecked, 55.34ms Time], IncrementalHoareTripleChecker [39 Valid, 23638 Invalid, 1 Unknown, 0 Unchecked, 16433.04ms Time] [2021-11-02 18:35:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32094 states. [2021-11-02 18:35:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32094 to 8084. [2021-11-02 18:35:15,330 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) [2021-11-02 18:35:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8084 states to 8084 states and 11643 transitions. [2021-11-02 18:35:15,344 INFO L78 Accepts]: Start accepts. Automaton has 8084 states and 11643 transitions. Word has length 158 [2021-11-02 18:35:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:35:15,344 INFO L470 AbstractCegarLoop]: Abstraction has 8084 states and 11643 transitions. [2021-11-02 18:35:15,345 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) [2021-11-02 18:35:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand 8084 states and 11643 transitions. [2021-11-02 18:35:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-02 18:35:15,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:35:15,352 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] [2021-11-02 18:35:15,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 18:35:15,563 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 [2021-11-02 18:35:15,564 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:35:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:35:15,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1108652355, now seen corresponding path program 1 times [2021-11-02 18:35:15,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:35:15,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915148383] [2021-11-02 18:35:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:35:15,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:35:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:35:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 18:35:16,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:35:16,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915148383] [2021-11-02 18:35:16,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915148383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:35:16,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:35:16,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-02 18:35:16,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371636652] [2021-11-02 18:35:16,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 18:35:16,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:35:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 18:35:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-02 18:35:16,191 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) [2021-11-02 18:35:23,904 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 [] [2021-11-02 18:35:38,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:35:38,374 INFO L93 Difference]: Finished difference Result 24744 states and 35709 transitions. [2021-11-02 18:35:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 18:35:38,376 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 [2021-11-02 18:35:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:35:38,404 INFO L225 Difference]: With dead ends: 24744 [2021-11-02 18:35:38,404 INFO L226 Difference]: Without dead ends: 16806 [2021-11-02 18:35:38,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1293.97ms TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 18:35:38,415 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4788 mSDsluCounter, 21884 mSDsCounter, 0 mSdLazyCounter, 29256 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16701.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4788 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 29309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 86.88ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 29256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19106.38ms IncrementalHoareTripleChecker+Time [2021-11-02 18:35:38,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4788 Valid, 0 Invalid, 29309 Unknown, 0 Unchecked, 86.88ms Time], IncrementalHoareTripleChecker [52 Valid, 29256 Invalid, 1 Unknown, 0 Unchecked, 19106.38ms Time] [2021-11-02 18:35:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16806 states. [2021-11-02 18:35:39,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16806 to 8124. [2021-11-02 18:35:39,181 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) [2021-11-02 18:35:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 11691 transitions. [2021-11-02 18:35:39,193 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 11691 transitions. Word has length 166 [2021-11-02 18:35:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:35:39,193 INFO L470 AbstractCegarLoop]: Abstraction has 8124 states and 11691 transitions. [2021-11-02 18:35:39,193 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) [2021-11-02 18:35:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 11691 transitions. [2021-11-02 18:35:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-02 18:35:39,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:35:39,200 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] [2021-11-02 18:35:39,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 18:35:39,200 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:35:39,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:35:39,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1340947775, now seen corresponding path program 1 times [2021-11-02 18:35:39,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:35:39,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818203835] [2021-11-02 18:35:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:35:39,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:35:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:35:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:35:40,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:35:40,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818203835] [2021-11-02 18:35:40,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818203835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 18:35:40,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:35:40,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-02 18:35:40,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131581656] [2021-11-02 18:35:40,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 18:35:40,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:35:40,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 18:35:40,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-11-02 18:35:40,649 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) [2021-11-02 18:35:53,007 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 [] [2021-11-02 18:39:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:39:00,772 INFO L93 Difference]: Finished difference Result 240088 states and 349275 transitions. [2021-11-02 18:39:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2021-11-02 18:39:00,773 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 [2021-11-02 18:39:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:39:01,431 INFO L225 Difference]: With dead ends: 240088 [2021-11-02 18:39:01,431 INFO L226 Difference]: Without dead ends: 232110 [2021-11-02 18:39:01,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25490 ImplicationChecksByTransitivity, 18362.78ms TimeCoverageRelationStatistics Valid=7081, Invalid=60259, Unknown=0, NotChecked=0, Total=67340 [2021-11-02 18:39:01,500 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 39199 mSDsluCounter, 196335 mSDsCounter, 0 mSdLazyCounter, 245170 mSolverCounterSat, 581 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129539.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39199 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 880.16ms SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 245170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148868.32ms IncrementalHoareTripleChecker+Time [2021-11-02 18:39:01,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39199 Valid, 0 Invalid, 245752 Unknown, 0 Unchecked, 880.16ms Time], IncrementalHoareTripleChecker [581 Valid, 245170 Invalid, 1 Unknown, 0 Unchecked, 148868.32ms Time] [2021-11-02 18:39:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232110 states. [2021-11-02 18:39:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232110 to 18586. [2021-11-02 18:39:05,795 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) [2021-11-02 18:39:05,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18586 states to 18586 states and 26951 transitions. [2021-11-02 18:39:05,822 INFO L78 Accepts]: Start accepts. Automaton has 18586 states and 26951 transitions. Word has length 166 [2021-11-02 18:39:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:39:05,822 INFO L470 AbstractCegarLoop]: Abstraction has 18586 states and 26951 transitions. [2021-11-02 18:39:05,822 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) [2021-11-02 18:39:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 18586 states and 26951 transitions. [2021-11-02 18:39:05,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-02 18:39:05,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:39:05,837 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] [2021-11-02 18:39:05,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 18:39:05,837 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:39:05,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:39:05,838 INFO L85 PathProgramCache]: Analyzing trace with hash -115618885, now seen corresponding path program 1 times [2021-11-02 18:39:05,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 18:39:05,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760387411] [2021-11-02 18:39:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:39:05,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 18:39:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:39:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 18:39:06,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 18:39:06,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760387411] [2021-11-02 18:39:06,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760387411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 18:39:06,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549841956] [2021-11-02 18:39:06,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:39:06,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 18:39:06,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:39:06,640 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) [2021-11-02 18:39:06,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 18:39:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:39:07,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-02 18:39:07,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:39:08,073 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-02 18:39:08,074 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 [2021-11-02 18:39:08,317 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 [2021-11-02 18:39:08,764 INFO L354 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2021-11-02 18:39:08,764 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 [2021-11-02 18:39:13,003 INFO L354 Elim1Store]: treesize reduction 70, result has 24.7 percent of original size [2021-11-02 18:39:13,004 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 [2021-11-02 18:39:13,049 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 [2021-11-02 18:39:17,538 INFO L354 Elim1Store]: treesize reduction 99, result has 28.8 percent of original size [2021-11-02 18:39:17,538 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 [2021-11-02 18:39:17,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-02 18:39:17,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 18:39:17,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-02 18:39:17,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846355386] [2021-11-02 18:39:17,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 18:39:17,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 18:39:17,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 18:39:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1968, Unknown=2, NotChecked=0, Total=2162 [2021-11-02 18:39:17,545 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) [2021-11-02 18:39:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 18:39:17,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 9151.89ms TimeCoverageRelationStatistics Valid=192, Invalid=1968, Unknown=2, NotChecked=0, Total=2162 [2021-11-02 18:39:17,546 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, 0.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-02 18:39:17,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.00ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-02 18:39:17,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 18:39:17,751 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 [2021-11-02 18:39:17,752 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@2ef5f465 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) [2021-11-02 18:39:17,755 INFO L158 Benchmark]: Toolchain (without parser) took 406165.58ms. Allocated memory was 102.8MB in the beginning and 3.4GB in the end (delta: 3.3GB). Free memory was 61.6MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2021-11-02 18:39:17,755 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 54.6MB in the beginning and 54.6MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-02 18:39:17,756 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1351.24ms. Allocated memory was 102.8MB in the beginning and 163.6MB in the end (delta: 60.8MB). Free memory was 61.6MB in the beginning and 95.9MB in the end (delta: -34.3MB). Peak memory consumption was 49.5MB. Max. memory is 16.1GB. [2021-11-02 18:39:17,756 INFO L158 Benchmark]: Boogie Procedure Inliner took 178.38ms. Allocated memory is still 163.6MB. Free memory was 95.9MB in the beginning and 105.4MB in the end (delta: -9.5MB). Peak memory consumption was 33.7MB. Max. memory is 16.1GB. [2021-11-02 18:39:17,756 INFO L158 Benchmark]: Boogie Preprocessor took 137.68ms. Allocated memory is still 163.6MB. Free memory was 105.4MB in the beginning and 83.7MB in the end (delta: 21.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-02 18:39:17,756 INFO L158 Benchmark]: RCFGBuilder took 1145.11ms. Allocated memory was 163.6MB in the beginning and 266.3MB in the end (delta: 102.8MB). Free memory was 83.7MB in the beginning and 187.9MB in the end (delta: -104.2MB). Peak memory consumption was 85.8MB. Max. memory is 16.1GB. [2021-11-02 18:39:17,756 INFO L158 Benchmark]: TraceAbstraction took 403348.33ms. Allocated memory was 266.3MB in the beginning and 3.4GB in the end (delta: 3.1GB). Free memory was 187.9MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2021-11-02 18:39:17,757 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 54.6MB in the beginning and 54.6MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1351.24ms. Allocated memory was 102.8MB in the beginning and 163.6MB in the end (delta: 60.8MB). Free memory was 61.6MB in the beginning and 95.9MB in the end (delta: -34.3MB). Peak memory consumption was 49.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 178.38ms. Allocated memory is still 163.6MB. Free memory was 95.9MB in the beginning and 105.4MB in the end (delta: -9.5MB). Peak memory consumption was 33.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 137.68ms. Allocated memory is still 163.6MB. Free memory was 105.4MB in the beginning and 83.7MB in the end (delta: 21.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * RCFGBuilder took 1145.11ms. Allocated memory was 163.6MB in the beginning and 266.3MB in the end (delta: 102.8MB). Free memory was 83.7MB in the beginning and 187.9MB in the end (delta: -104.2MB). Peak memory consumption was 85.8MB. Max. memory is 16.1GB. * TraceAbstraction took 403348.33ms. Allocated memory was 266.3MB in the beginning and 3.4GB in the end (delta: 3.1GB). Free memory was 187.9MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 1.5GB. 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@2ef5f465 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2ef5f465: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-02 18:39:17,779 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-4d01470 [2021-11-02 18:39:19,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 18:39:19,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 18:39:19,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 18:39:19,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 18:39:19,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 18:39:19,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 18:39:19,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 18:39:19,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 18:39:19,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 18:39:19,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 18:39:19,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 18:39:19,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 18:39:19,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 18:39:19,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 18:39:19,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 18:39:19,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 18:39:19,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 18:39:19,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 18:39:19,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 18:39:19,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 18:39:19,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 18:39:19,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 18:39:19,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 18:39:19,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 18:39:19,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 18:39:19,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 18:39:19,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 18:39:19,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 18:39:19,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 18:39:19,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 18:39:19,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 18:39:19,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 18:39:19,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 18:39:19,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 18:39:19,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 18:39:19,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 18:39:19,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 18:39:19,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 18:39:19,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 18:39:19,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 18:39:19,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-02 18:39:19,699 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 18:39:19,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 18:39:19,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 18:39:19,703 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 18:39:19,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 18:39:19,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 18:39:19,705 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 18:39:19,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 18:39:19,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 18:39:19,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 18:39:19,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 18:39:19,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 18:39:19,706 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 18:39:19,707 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 18:39:19,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 18:39:19,707 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 18:39:19,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 18:39:19,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 18:39:19,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 18:39:19,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 18:39:19,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 18:39:19,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 18:39:19,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 18:39:19,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 18:39:19,714 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 18:39:19,714 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 18:39:19,714 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 18:39:19,714 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 18:39:19,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 18:39:19,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 18:39:19,715 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 18:39:19,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-02 18:39:19,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 18:39:20,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 18:39:20,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 18:39:20,015 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 18:39:20,016 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 18:39:20,017 INFO L432 ainManager$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 [2021-11-02 18:39:20,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/955b12663/6a7f49e4a2674e89beabbbaaf8be9c5e/FLAG5ca3185d6 [2021-11-02 18:39:20,730 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 18:39:20,743 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 [2021-11-02 18:39:20,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/955b12663/6a7f49e4a2674e89beabbbaaf8be9c5e/FLAG5ca3185d6 [2021-11-02 18:39:20,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/955b12663/6a7f49e4a2674e89beabbbaaf8be9c5e [2021-11-02 18:39:20,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 18:39:20,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 18:39:20,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 18:39:20,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 18:39:20,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 18:39:20,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 06:39:20" (1/1) ... [2021-11-02 18:39:20,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1e456a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:20, skipping insertion in model container [2021-11-02 18:39:20,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 06:39:20" (1/1) ... [2021-11-02 18:39:20,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 18:39:21,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 18:39:21,815 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] [2021-11-02 18:39:22,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 18:39:22,182 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 18:39:22,308 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] [2021-11-02 18:39:22,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 18:39:22,475 INFO L208 MainTranslator]: Completed translation [2021-11-02 18:39:22,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22 WrapperNode [2021-11-02 18:39:22,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 18:39:22,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 18:39:22,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 18:39:22,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 18:39:22,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22" (1/1) ... [2021-11-02 18:39:22,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22" (1/1) ... [2021-11-02 18:39:22,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 18:39:22,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 18:39:22,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 18:39:22,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 18:39:22,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22" (1/1) ... [2021-11-02 18:39:22,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22" (1/1) ... [2021-11-02 18:39:22,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22" (1/1) ... [2021-11-02 18:39:22,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22" (1/1) ... [2021-11-02 18:39:22,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22" (1/1) ... [2021-11-02 18:39:22,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22" (1/1) ... [2021-11-02 18:39:22,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22" (1/1) ... [2021-11-02 18:39:22,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 18:39:22,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 18:39:22,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 18:39:22,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 18:39:22,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22" (1/1) ... [2021-11-02 18:39:22,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 18:39:22,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 18:39:22,997 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) [2021-11-02 18:39:23,027 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 [2021-11-02 18:39:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-02 18:39:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-02 18:39:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 18:39:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 18:39:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-02 18:39:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 18:39:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 18:39:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 18:39:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-02 18:39:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-02 18:39:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-02 18:39:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 18:39:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 18:39:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 18:39:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 18:39:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-02 18:39:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-02 18:39:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-02 18:39:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-02 18:39:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-02 18:39:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-02 18:39:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 18:39:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 18:39:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-02 18:39:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-02 18:39:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-02 18:39:23,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-02 18:39:23,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 18:39:23,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 18:39:24,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 18:39:24,350 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2021-11-02 18:39:24,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 06:39:24 BoogieIcfgContainer [2021-11-02 18:39:24,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 18:39:24,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 18:39:24,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 18:39:24,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 18:39:24,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 06:39:20" (1/3) ... [2021-11-02 18:39:24,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4c3310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 06:39:24, skipping insertion in model container [2021-11-02 18:39:24,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 06:39:22" (2/3) ... [2021-11-02 18:39:24,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4c3310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 06:39:24, skipping insertion in model container [2021-11-02 18:39:24,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 06:39:24" (3/3) ... [2021-11-02 18:39:24,361 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 [2021-11-02 18:39:24,365 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 18:39:24,365 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 18:39:24,432 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 18:39:24,439 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 [2021-11-02 18:39:24,439 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 18:39:24,466 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) [2021-11-02 18:39:24,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 18:39:24,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:39:24,477 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] [2021-11-02 18:39:24,477 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:39:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:39:24,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2021-11-02 18:39:24,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 18:39:24,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938381950] [2021-11-02 18:39:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:39:24,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 18:39:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-02 18:39:24,498 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) [2021-11-02 18:39:24,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 18:39:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:39:24,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 18:39:24,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:39:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:39:24,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:39:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:39:25,040 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 18:39:25,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938381950] [2021-11-02 18:39:25,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938381950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 18:39:25,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:39:25,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 18:39:25,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38659807] [2021-11-02 18:39:25,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:39:25,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 18:39:25,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:39:25,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:39:25,067 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) [2021-11-02 18:39:30,925 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 [] [2021-11-02 18:39:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:39:52,526 INFO L93 Difference]: Finished difference Result 3410 states and 5239 transitions. [2021-11-02 18:39:52,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 18:39:52,529 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 [2021-11-02 18:39:52,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:39:52,551 INFO L225 Difference]: With dead ends: 3410 [2021-11-02 18:39:52,551 INFO L226 Difference]: Without dead ends: 2501 [2021-11-02 18:39:52,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.15ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:39:52,557 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3650 mSDsluCounter, 2476 mSDsCounter, 0 mSdLazyCounter, 3781 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24601.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3650 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 3791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 62.22ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3781 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26887.52ms IncrementalHoareTripleChecker+Time [2021-11-02 18:39:52,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3650 Valid, 12 Invalid, 3791 Unknown, 0 Unchecked, 62.22ms Time], IncrementalHoareTripleChecker [9 Valid, 3781 Invalid, 1 Unknown, 0 Unchecked, 26887.52ms Time] [2021-11-02 18:39:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-11-02 18:39:52,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2481. [2021-11-02 18:39:52,665 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) [2021-11-02 18:39:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 3649 transitions. [2021-11-02 18:39:52,673 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 3649 transitions. Word has length 36 [2021-11-02 18:39:52,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:39:52,673 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 3649 transitions. [2021-11-02 18:39:52,674 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) [2021-11-02 18:39:52,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 3649 transitions. [2021-11-02 18:39:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 18:39:52,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:39:52,676 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] [2021-11-02 18:39:52,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 18:39:52,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-02 18:39:52,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:39:52,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:39:52,886 INFO L85 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2021-11-02 18:39:52,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 18:39:52,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785561556] [2021-11-02 18:39:52,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:39:52,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 18:39:52,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-02 18:39:52,891 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) [2021-11-02 18:39:52,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 18:39:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:39:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 18:39:53,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:39:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:39:53,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:39:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:39:53,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 18:39:53,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785561556] [2021-11-02 18:39:53,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785561556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 18:39:53,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:39:53,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 18:39:53,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385743096] [2021-11-02 18:39:53,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 18:39:53,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 18:39:53,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 18:39:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 18:39:53,550 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) [2021-11-02 18:40:12,412 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 [] [2021-11-02 18:40:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:40:44,347 INFO L93 Difference]: Finished difference Result 8146 states and 12015 transitions. [2021-11-02 18:40:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 18:40:44,371 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 [2021-11-02 18:40:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:40:44,389 INFO L225 Difference]: With dead ends: 8146 [2021-11-02 18:40:44,389 INFO L226 Difference]: Without dead ends: 5718 [2021-11-02 18:40:44,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 245.04ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 18:40:44,393 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3728 mSDsluCounter, 3788 mSDsCounter, 0 mSdLazyCounter, 6284 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46668.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3728 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 71.00ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 6284 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49989.50ms IncrementalHoareTripleChecker+Time [2021-11-02 18:40:44,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3728 Valid, 0 Invalid, 6291 Unknown, 0 Unchecked, 71.00ms Time], IncrementalHoareTripleChecker [6 Valid, 6284 Invalid, 1 Unknown, 0 Unchecked, 49989.50ms Time] [2021-11-02 18:40:44,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2021-11-02 18:40:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 2484. [2021-11-02 18:40:44,469 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) [2021-11-02 18:40:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 3651 transitions. [2021-11-02 18:40:44,474 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 3651 transitions. Word has length 40 [2021-11-02 18:40:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:40:44,475 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 3651 transitions. [2021-11-02 18:40:44,477 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) [2021-11-02 18:40:44,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 3651 transitions. [2021-11-02 18:40:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 18:40:44,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:40:44,483 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] [2021-11-02 18:40:44,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 18:40:44,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-02 18:40:44,694 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:40:44,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:40:44,695 INFO L85 PathProgramCache]: Analyzing trace with hash -349053682, now seen corresponding path program 1 times [2021-11-02 18:40:44,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 18:40:44,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142318630] [2021-11-02 18:40:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:40:44,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 18:40:44,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-02 18:40:44,696 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) [2021-11-02 18:40:44,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 18:40:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:40:45,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 18:40:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:40:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:40:45,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:40:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:40:45,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 18:40:45,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142318630] [2021-11-02 18:40:45,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142318630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 18:40:45,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:40:45,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-02 18:40:45,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774099661] [2021-11-02 18:40:45,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 18:40:45,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 18:40:45,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 18:40:45,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 18:40:45,708 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) [2021-11-02 18:40:57,503 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:40:58,557 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:41:07,644 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 [] [2021-11-02 18:41:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:41:30,219 INFO L93 Difference]: Finished difference Result 7337 states and 10818 transitions. [2021-11-02 18:41:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:41:30,221 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 [2021-11-02 18:41:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:41:30,235 INFO L225 Difference]: With dead ends: 7337 [2021-11-02 18:41:30,236 INFO L226 Difference]: Without dead ends: 4900 [2021-11-02 18:41:30,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 317.36ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-02 18:41:30,244 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1252 mSDsluCounter, 3613 mSDsCounter, 0 mSdLazyCounter, 5100 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41602.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.72ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44011.51ms IncrementalHoareTripleChecker+Time [2021-11-02 18:41:30,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 0 Invalid, 5103 Unknown, 0 Unchecked, 41.72ms Time], IncrementalHoareTripleChecker [2 Valid, 5100 Invalid, 1 Unknown, 0 Unchecked, 44011.51ms Time] [2021-11-02 18:41:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4900 states. [2021-11-02 18:41:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4900 to 4746. [2021-11-02 18:41:30,337 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) [2021-11-02 18:41:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 7028 transitions. [2021-11-02 18:41:30,347 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 7028 transitions. Word has length 40 [2021-11-02 18:41:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:41:30,347 INFO L470 AbstractCegarLoop]: Abstraction has 4746 states and 7028 transitions. [2021-11-02 18:41:30,347 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) [2021-11-02 18:41:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 7028 transitions. [2021-11-02 18:41:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 18:41:30,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:41:30,352 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] [2021-11-02 18:41:30,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-02 18:41:30,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-02 18:41:30,562 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:41:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:41:30,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2050141973, now seen corresponding path program 1 times [2021-11-02 18:41:30,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 18:41:30,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637625852] [2021-11-02 18:41:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:41:30,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 18:41:30,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-02 18:41:30,565 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) [2021-11-02 18:41:30,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 18:41:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:41:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 18:41:30,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:41:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:41:31,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:41:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:41:31,682 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 18:41:31,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637625852] [2021-11-02 18:41:31,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637625852] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 18:41:31,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:41:31,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 18:41:31,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252298200] [2021-11-02 18:41:31,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:41:31,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 18:41:31,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:41:31,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:41:31,685 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) [2021-11-02 18:41:41,650 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:41:48,209 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 [] [2021-11-02 18:41:55,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:41:55,592 INFO L93 Difference]: Finished difference Result 11625 states and 17257 transitions. [2021-11-02 18:41:55,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:41:55,597 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 [2021-11-02 18:41:55,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:41:55,618 INFO L225 Difference]: With dead ends: 11625 [2021-11-02 18:41:55,618 INFO L226 Difference]: Without dead ends: 6932 [2021-11-02 18:41:55,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.13ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:41:55,626 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 629 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22167.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.84ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23589.60ms IncrementalHoareTripleChecker+Time [2021-11-02 18:41:55,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 0 Invalid, 2526 Unknown, 0 Unchecked, 15.84ms Time], IncrementalHoareTripleChecker [2 Valid, 2523 Invalid, 1 Unknown, 0 Unchecked, 23589.60ms Time] [2021-11-02 18:41:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2021-11-02 18:41:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 6906. [2021-11-02 18:41:55,799 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) [2021-11-02 18:41:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6906 states to 6906 states and 10258 transitions. [2021-11-02 18:41:55,815 INFO L78 Accepts]: Start accepts. Automaton has 6906 states and 10258 transitions. Word has length 69 [2021-11-02 18:41:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:41:55,817 INFO L470 AbstractCegarLoop]: Abstraction has 6906 states and 10258 transitions. [2021-11-02 18:41:55,817 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) [2021-11-02 18:41:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6906 states and 10258 transitions. [2021-11-02 18:41:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 18:41:55,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:41:55,827 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] [2021-11-02 18:41:55,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 18:41:56,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-02 18:41:56,041 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:41:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:41:56,042 INFO L85 PathProgramCache]: Analyzing trace with hash -643253754, now seen corresponding path program 1 times [2021-11-02 18:41:56,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 18:41:56,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038771182] [2021-11-02 18:41:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:41:56,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 18:41:56,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-02 18:41:56,044 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) [2021-11-02 18:41:56,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 18:41:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:41:56,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 18:41:56,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:41:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:41:56,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:41:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:41:57,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 18:41:57,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038771182] [2021-11-02 18:41:57,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038771182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 18:41:57,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:41:57,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 18:41:57,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759161119] [2021-11-02 18:41:57,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:41:57,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 18:41:57,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:41:57,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:41:57,271 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) [2021-11-02 18:42:13,755 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 [] [2021-11-02 18:42:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:42:26,352 INFO L93 Difference]: Finished difference Result 16465 states and 24456 transitions. [2021-11-02 18:42:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:42:26,353 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 [2021-11-02 18:42:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:42:26,382 INFO L225 Difference]: With dead ends: 16465 [2021-11-02 18:42:26,382 INFO L226 Difference]: Without dead ends: 9612 [2021-11-02 18:42:26,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.87ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:42:26,392 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 738 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 3170 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27136.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.90ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28716.35ms IncrementalHoareTripleChecker+Time [2021-11-02 18:42:26,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 0 Invalid, 3173 Unknown, 0 Unchecked, 17.90ms Time], IncrementalHoareTripleChecker [2 Valid, 3170 Invalid, 1 Unknown, 0 Unchecked, 28716.35ms Time] [2021-11-02 18:42:26,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2021-11-02 18:42:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 9573. [2021-11-02 18:42:26,630 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) [2021-11-02 18:42:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9573 states to 9573 states and 14203 transitions. [2021-11-02 18:42:26,646 INFO L78 Accepts]: Start accepts. Automaton has 9573 states and 14203 transitions. Word has length 75 [2021-11-02 18:42:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:42:26,646 INFO L470 AbstractCegarLoop]: Abstraction has 9573 states and 14203 transitions. [2021-11-02 18:42:26,646 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) [2021-11-02 18:42:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 9573 states and 14203 transitions. [2021-11-02 18:42:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 18:42:26,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:42:26,654 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] [2021-11-02 18:42:26,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-02 18:42:26,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-02 18:42:26,868 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:42:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:42:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2021-11-02 18:42:26,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 18:42:26,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504164215] [2021-11-02 18:42:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:42:26,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 18:42:26,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-02 18:42:26,870 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) [2021-11-02 18:42:26,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 18:42:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:42:27,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 18:42:27,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:42:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:42:27,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:42:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 18:42:28,088 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 18:42:28,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504164215] [2021-11-02 18:42:28,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504164215] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 18:42:28,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:42:28,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 18:42:28,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310402057] [2021-11-02 18:42:28,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 18:42:28,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 18:42:28,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 18:42:28,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:42:28,090 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) [2021-11-02 18:42:38,457 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 [] [2021-11-02 18:42:56,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:42:56,561 INFO L93 Difference]: Finished difference Result 24224 states and 36235 transitions. [2021-11-02 18:42:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 18:42:56,563 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 [2021-11-02 18:42:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:42:56,589 INFO L225 Difference]: With dead ends: 24224 [2021-11-02 18:42:56,589 INFO L226 Difference]: Without dead ends: 14704 [2021-11-02 18:42:56,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.25ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 18:42:56,600 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2125 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 3051 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26187.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.22ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3051 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27989.40ms IncrementalHoareTripleChecker+Time [2021-11-02 18:42:56,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2125 Valid, 0 Invalid, 3098 Unknown, 0 Unchecked, 27.22ms Time], IncrementalHoareTripleChecker [46 Valid, 3051 Invalid, 1 Unknown, 0 Unchecked, 27989.40ms Time] [2021-11-02 18:42:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14704 states. [2021-11-02 18:42:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14704 to 14652. [2021-11-02 18:42:56,996 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) [2021-11-02 18:42:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14652 states to 14652 states and 21787 transitions. [2021-11-02 18:42:57,036 INFO L78 Accepts]: Start accepts. Automaton has 14652 states and 21787 transitions. Word has length 83 [2021-11-02 18:42:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:42:57,037 INFO L470 AbstractCegarLoop]: Abstraction has 14652 states and 21787 transitions. [2021-11-02 18:42:57,038 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) [2021-11-02 18:42:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 14652 states and 21787 transitions. [2021-11-02 18:42:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 18:42:57,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:42:57,045 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] [2021-11-02 18:42:57,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 18:42:57,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-02 18:42:57,260 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:42:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:42:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2021-11-02 18:42:57,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 18:42:57,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922666653] [2021-11-02 18:42:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:42:57,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 18:42:57,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-02 18:42:57,262 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) [2021-11-02 18:42:57,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 18:42:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:42:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 18:42:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:42:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:42:57,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:42:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:42:58,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 18:42:58,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922666653] [2021-11-02 18:42:58,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922666653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 18:42:58,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:42:58,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 18:42:58,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811878439] [2021-11-02 18:42:58,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 18:42:58,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 18:42:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 18:42:58,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:42:58,168 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) [2021-11-02 18:43:10,526 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 [] [2021-11-02 18:43:31,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:43:31,166 INFO L93 Difference]: Finished difference Result 35452 states and 52856 transitions. [2021-11-02 18:43:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 18:43:31,168 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 [2021-11-02 18:43:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:43:31,231 INFO L225 Difference]: With dead ends: 35452 [2021-11-02 18:43:31,232 INFO L226 Difference]: Without dead ends: 27939 [2021-11-02 18:43:31,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.15ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 18:43:31,248 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1121 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 3530 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30347.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.73ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3530 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32223.36ms IncrementalHoareTripleChecker+Time [2021-11-02 18:43:31,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 0 Invalid, 3568 Unknown, 0 Unchecked, 21.73ms Time], IncrementalHoareTripleChecker [37 Valid, 3530 Invalid, 1 Unknown, 0 Unchecked, 32223.36ms Time] [2021-11-02 18:43:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27939 states. [2021-11-02 18:43:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27939 to 14844. [2021-11-02 18:43:31,728 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) [2021-11-02 18:43:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14844 states to 14844 states and 21979 transitions. [2021-11-02 18:43:31,751 INFO L78 Accepts]: Start accepts. Automaton has 14844 states and 21979 transitions. Word has length 84 [2021-11-02 18:43:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:43:31,752 INFO L470 AbstractCegarLoop]: Abstraction has 14844 states and 21979 transitions. [2021-11-02 18:43:31,752 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) [2021-11-02 18:43:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 14844 states and 21979 transitions. [2021-11-02 18:43:31,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 18:43:31,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:43:31,760 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] [2021-11-02 18:43:31,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-02 18:43:31,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-02 18:43:31,974 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:43:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:43:31,975 INFO L85 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2021-11-02 18:43:31,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 18:43:31,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901104993] [2021-11-02 18:43:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:43:31,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 18:43:31,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-02 18:43:31,976 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) [2021-11-02 18:43:31,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 18:43:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:43:32,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 18:43:32,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:43:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:43:33,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:43:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:43:33,909 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 18:43:33,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901104993] [2021-11-02 18:43:33,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901104993] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 18:43:33,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:43:33,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-02 18:43:33,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880325989] [2021-11-02 18:43:33,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 18:43:33,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 18:43:33,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 18:43:33,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 18:43:33,911 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) [2021-11-02 18:43:41,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:43:46,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:44:34,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:44:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 18:44:47,959 INFO L93 Difference]: Finished difference Result 42462 states and 62981 transitions. [2021-11-02 18:44:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 18:44:47,961 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 [2021-11-02 18:44:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 18:44:48,015 INFO L225 Difference]: With dead ends: 42462 [2021-11-02 18:44:48,015 INFO L226 Difference]: Without dead ends: 27671 [2021-11-02 18:44:48,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 149.89ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 18:44:48,039 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4326 mSDsluCounter, 5554 mSDsCounter, 0 mSdLazyCounter, 8154 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68519.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4326 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 87.46ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 8154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72855.17ms IncrementalHoareTripleChecker+Time [2021-11-02 18:44:48,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4326 Valid, 0 Invalid, 8213 Unknown, 0 Unchecked, 87.46ms Time], IncrementalHoareTripleChecker [58 Valid, 8154 Invalid, 1 Unknown, 0 Unchecked, 72855.17ms Time] [2021-11-02 18:44:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27671 states. [2021-11-02 18:44:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27671 to 14214. [2021-11-02 18:44:48,575 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) [2021-11-02 18:44:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14214 states to 14214 states and 20897 transitions. [2021-11-02 18:44:48,619 INFO L78 Accepts]: Start accepts. Automaton has 14214 states and 20897 transitions. Word has length 86 [2021-11-02 18:44:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 18:44:48,619 INFO L470 AbstractCegarLoop]: Abstraction has 14214 states and 20897 transitions. [2021-11-02 18:44:48,619 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) [2021-11-02 18:44:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 14214 states and 20897 transitions. [2021-11-02 18:44:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 18:44:48,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 18:44:48,627 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] [2021-11-02 18:44:48,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 18:44:48,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-02 18:44:48,841 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 18:44:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 18:44:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash 115550791, now seen corresponding path program 1 times [2021-11-02 18:44:48,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 18:44:48,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422892998] [2021-11-02 18:44:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 18:44:48,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 18:44:48,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-02 18:44:48,843 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) [2021-11-02 18:44:48,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 18:44:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 18:44:49,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 18:44:49,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 18:44:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:44:50,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 18:44:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 18:44:51,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 18:44:51,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422892998] [2021-11-02 18:44:51,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422892998] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 18:44:51,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 18:44:51,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-02 18:44:51,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831289752] [2021-11-02 18:44:51,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 18:44:51,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 18:44:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 18:44:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-02 18:44:51,017 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) [2021-11-02 18:45:22,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:45:27,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 18:45:28,538 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15