./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.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-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.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 b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 19:46:25,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 19:46:25,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 19:46:25,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 19:46:25,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 19:46:25,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 19:46:25,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 19:46:25,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 19:46:25,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 19:46:25,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 19:46:25,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 19:46:25,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 19:46:25,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 19:46:25,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 19:46:25,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 19:46:25,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 19:46:25,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 19:46:25,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 19:46:25,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 19:46:25,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 19:46:25,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 19:46:25,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 19:46:25,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 19:46:25,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 19:46:25,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 19:46:25,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 19:46:25,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 19:46:25,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 19:46:25,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 19:46:25,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 19:46:25,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 19:46:25,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 19:46:25,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 19:46:25,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 19:46:25,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 19:46:25,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 19:46:25,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 19:46:25,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 19:46:25,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 19:46:25,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 19:46:25,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 19:46:25,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 19:46:25,579 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 19:46:25,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 19:46:25,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 19:46:25,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 19:46:25,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 19:46:25,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 19:46:25,581 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 19:46:25,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 19:46:25,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 19:46:25,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 19:46:25,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 19:46:25,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 19:46:25,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 19:46:25,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 19:46:25,583 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 19:46:25,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 19:46:25,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 19:46:25,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 19:46:25,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 19:46:25,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 19:46:25,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 19:46:25,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 19:46:25,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 19:46:25,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 19:46:25,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 19:46:25,585 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 19:46:25,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 19:46:25,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 19:46:25,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 19:46:25,587 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a [2021-11-02 19:46:25,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 19:46:25,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 19:46:25,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 19:46:25,780 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 19:46:25,781 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 19:46:25,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-02 19:46:25,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44c785f18/c5e04dda631747fbbd6c1d084800c8e6/FLAG99166b992 [2021-11-02 19:46:26,398 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 19:46:26,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-02 19:46:26,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44c785f18/c5e04dda631747fbbd6c1d084800c8e6/FLAG99166b992 [2021-11-02 19:46:26,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44c785f18/c5e04dda631747fbbd6c1d084800c8e6 [2021-11-02 19:46:26,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 19:46:26,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 19:46:26,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 19:46:26,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 19:46:26,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 19:46:26,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:46:26" (1/1) ... [2021-11-02 19:46:26,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38606092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:26, skipping insertion in model container [2021-11-02 19:46:26,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:46:26" (1/1) ... [2021-11-02 19:46:26,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 19:46:26,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 19:46:27,612 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-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-02 19:46:27,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 19:46:27,639 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 19:46:27,850 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-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-02 19:46:27,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 19:46:27,936 INFO L208 MainTranslator]: Completed translation [2021-11-02 19:46:27,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27 WrapperNode [2021-11-02 19:46:27,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 19:46:27,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 19:46:27,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 19:46:27,939 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 19:46:27,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27" (1/1) ... [2021-11-02 19:46:28,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27" (1/1) ... [2021-11-02 19:46:28,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 19:46:28,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 19:46:28,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 19:46:28,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 19:46:28,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27" (1/1) ... [2021-11-02 19:46:28,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27" (1/1) ... [2021-11-02 19:46:28,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27" (1/1) ... [2021-11-02 19:46:28,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27" (1/1) ... [2021-11-02 19:46:28,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27" (1/1) ... [2021-11-02 19:46:28,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27" (1/1) ... [2021-11-02 19:46:28,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27" (1/1) ... [2021-11-02 19:46:28,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 19:46:28,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 19:46:28,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 19:46:28,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 19:46:28,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27" (1/1) ... [2021-11-02 19:46:28,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 19:46:28,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 19:46:28,464 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 19:46:28,488 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 19:46:28,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-02 19:46:28,501 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-02 19:46:28,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 19:46:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 19:46:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 19:46:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 19:46:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 19:46:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 19:46:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 19:46:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-02 19:46:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 19:46:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 19:46:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 19:46:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 19:46:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-02 19:46:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 19:46:28,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 19:46:30,085 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 19:46:30,086 INFO L299 CfgBuilder]: Removed 1734 assume(true) statements. [2021-11-02 19:46:30,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:46:30 BoogieIcfgContainer [2021-11-02 19:46:30,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 19:46:30,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 19:46:30,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 19:46:30,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 19:46:30,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 07:46:26" (1/3) ... [2021-11-02 19:46:30,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23dbe024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:46:30, skipping insertion in model container [2021-11-02 19:46:30,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:46:27" (2/3) ... [2021-11-02 19:46:30,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23dbe024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:46:30, skipping insertion in model container [2021-11-02 19:46:30,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:46:30" (3/3) ... [2021-11-02 19:46:30,095 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-02 19:46:30,098 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 19:46:30,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 19:46:30,133 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 19:46:30,137 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 19:46:30,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 19:46:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 1834 states, 1832 states have (on average 1.4939956331877728) internal successors, (2737), 1833 states have internal predecessors, (2737), 0 states have call successors, (0), 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 19:46:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 19:46:30,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:46:30,186 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, 1, 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 19:46:30,186 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:46:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:46:30,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1253874950, now seen corresponding path program 1 times [2021-11-02 19:46:30,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:46:30,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317225507] [2021-11-02 19:46:30,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:46:30,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:46:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:46:30,475 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 19:46:30,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:46:30,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317225507] [2021-11-02 19:46:30,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317225507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:46:30,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:46:30,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 19:46:30,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677076809] [2021-11-02 19:46:30,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 19:46:30,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:46:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 19:46:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 19:46:30,507 INFO L87 Difference]: Start difference. First operand has 1834 states, 1832 states have (on average 1.4939956331877728) internal successors, (2737), 1833 states have internal predecessors, (2737), 0 states have call successors, (0), 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 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:46:33,823 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 19:46:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:46:35,640 INFO L93 Difference]: Finished difference Result 3664 states and 5469 transitions. [2021-11-02 19:46:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 19:46:35,642 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-02 19:46:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:46:35,658 INFO L225 Difference]: With dead ends: 3664 [2021-11-02 19:46:35,659 INFO L226 Difference]: Without dead ends: 1799 [2021-11-02 19:46:35,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 19:46:35,667 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4425.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5012.87ms IncrementalHoareTripleChecker+Time [2021-11-02 19:46:35,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 2707 Unknown, 0 Unchecked, 5.52ms Time], IncrementalHoareTripleChecker [0 Valid, 2706 Invalid, 1 Unknown, 0 Unchecked, 5012.87ms Time] [2021-11-02 19:46:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-11-02 19:46:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1799. [2021-11-02 19:46:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 1.4799777530589544) internal successors, (2661), 1798 states have internal predecessors, (2661), 0 states have call successors, (0), 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 19:46:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2661 transitions. [2021-11-02 19:46:35,751 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2661 transitions. Word has length 65 [2021-11-02 19:46:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:46:35,751 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2661 transitions. [2021-11-02 19:46:35,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:46:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2661 transitions. [2021-11-02 19:46:35,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 19:46:35,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:46:35,754 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, 1, 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 19:46:35,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 19:46:35,755 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:46:35,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:46:35,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1631549198, now seen corresponding path program 1 times [2021-11-02 19:46:35,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:46:35,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895720088] [2021-11-02 19:46:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:46:35,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:46:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:46:35,874 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 19:46:35,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:46:35,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895720088] [2021-11-02 19:46:35,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895720088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:46:35,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:46:35,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 19:46:35,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022643103] [2021-11-02 19:46:35,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 19:46:35,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:46:35,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 19:46:35,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:46:35,878 INFO L87 Difference]: Start difference. First operand 1799 states and 2661 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:46:38,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:46:39,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:46:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:46:42,551 INFO L93 Difference]: Finished difference Result 3571 states and 5297 transitions. [2021-11-02 19:46:42,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 19:46:42,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-02 19:46:42,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:46:42,558 INFO L225 Difference]: With dead ends: 3571 [2021-11-02 19:46:42,558 INFO L226 Difference]: Without dead ends: 1804 [2021-11-02 19:46:42,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.58ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:46:42,561 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 2640 mSDsCounter, 0 mSdLazyCounter, 5317 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5927.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.58ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6565.75ms IncrementalHoareTripleChecker+Time [2021-11-02 19:46:42,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 5325 Unknown, 0 Unchecked, 11.58ms Time], IncrementalHoareTripleChecker [8 Valid, 5317 Invalid, 0 Unknown, 0 Unchecked, 6565.75ms Time] [2021-11-02 19:46:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-11-02 19:46:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1804. [2021-11-02 19:46:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 1.478646699944537) internal successors, (2666), 1803 states have internal predecessors, (2666), 0 states have call successors, (0), 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 19:46:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2666 transitions. [2021-11-02 19:46:42,593 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2666 transitions. Word has length 65 [2021-11-02 19:46:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:46:42,594 INFO L470 AbstractCegarLoop]: Abstraction has 1804 states and 2666 transitions. [2021-11-02 19:46:42,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:46:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2666 transitions. [2021-11-02 19:46:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 19:46:42,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:46:42,596 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, 1, 1, 1, 1, 1, 1, 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 19:46:42,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 19:46:42,597 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:46:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:46:42,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1085390983, now seen corresponding path program 1 times [2021-11-02 19:46:42,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:46:42,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021479932] [2021-11-02 19:46:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:46:42,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:46:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:46:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 19:46:42,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:46:42,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021479932] [2021-11-02 19:46:42,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021479932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:46:42,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:46:42,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 19:46:42,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137828234] [2021-11-02 19:46:42,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 19:46:42,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:46:42,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 19:46:42,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:46:42,673 INFO L87 Difference]: Start difference. First operand 1804 states and 2666 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 19:46:47,336 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:46:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:46:49,867 INFO L93 Difference]: Finished difference Result 3570 states and 5291 transitions. [2021-11-02 19:46:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 19:46:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-02 19:46:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:46:49,877 INFO L225 Difference]: With dead ends: 3570 [2021-11-02 19:46:49,877 INFO L226 Difference]: Without dead ends: 1806 [2021-11-02 19:46:49,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.95ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:46:49,880 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 2640 mSDsCounter, 0 mSdLazyCounter, 5320 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6475.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.19ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7118.57ms IncrementalHoareTripleChecker+Time [2021-11-02 19:46:49,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 5322 Unknown, 0 Unchecked, 8.19ms Time], IncrementalHoareTripleChecker [2 Valid, 5320 Invalid, 0 Unknown, 0 Unchecked, 7118.57ms Time] [2021-11-02 19:46:49,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-11-02 19:46:49,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1806. [2021-11-02 19:46:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 1.4781163434903046) internal successors, (2668), 1805 states have internal predecessors, (2668), 0 states have call successors, (0), 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 19:46:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2668 transitions. [2021-11-02 19:46:49,907 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2668 transitions. Word has length 70 [2021-11-02 19:46:49,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:46:49,908 INFO L470 AbstractCegarLoop]: Abstraction has 1806 states and 2668 transitions. [2021-11-02 19:46:49,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 19:46:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2668 transitions. [2021-11-02 19:46:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 19:46:49,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:46:49,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:46:49,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 19:46:49,910 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:46:49,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:46:49,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1738638429, now seen corresponding path program 1 times [2021-11-02 19:46:49,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:46:49,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475374213] [2021-11-02 19:46:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:46:49,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:46:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:46:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 19:46:50,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:46:50,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475374213] [2021-11-02 19:46:50,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475374213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:46:50,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:46:50,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 19:46:50,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43249407] [2021-11-02 19:46:50,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 19:46:50,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:46:50,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 19:46:50,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:46:50,019 INFO L87 Difference]: Start difference. First operand 1806 states and 2668 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 19:46:52,293 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 19:46:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:46:57,816 INFO L93 Difference]: Finished difference Result 4408 states and 6512 transitions. [2021-11-02 19:46:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 19:46:57,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-02 19:46:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:46:57,824 INFO L225 Difference]: With dead ends: 4408 [2021-11-02 19:46:57,824 INFO L226 Difference]: Without dead ends: 2661 [2021-11-02 19:46:57,827 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 19:46:57,827 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1295 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 5258 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6991.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.82ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7682.86ms IncrementalHoareTripleChecker+Time [2021-11-02 19:46:57,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1295 Valid, 0 Invalid, 5261 Unknown, 0 Unchecked, 9.82ms Time], IncrementalHoareTripleChecker [2 Valid, 5258 Invalid, 1 Unknown, 0 Unchecked, 7682.86ms Time] [2021-11-02 19:46:57,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2021-11-02 19:46:57,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 2658. [2021-11-02 19:46:57,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2657 states have (on average 1.4704554008280015) internal successors, (3907), 2657 states have internal predecessors, (3907), 0 states have call successors, (0), 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 19:46:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3907 transitions. [2021-11-02 19:46:57,875 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3907 transitions. Word has length 72 [2021-11-02 19:46:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:46:57,875 INFO L470 AbstractCegarLoop]: Abstraction has 2658 states and 3907 transitions. [2021-11-02 19:46:57,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 19:46:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3907 transitions. [2021-11-02 19:46:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 19:46:57,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:46:57,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 19:46:57,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 19:46:57,879 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:46:57,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:46:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1414922419, now seen corresponding path program 1 times [2021-11-02 19:46:57,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:46:57,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251962938] [2021-11-02 19:46:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:46:57,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:46:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:46:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 19:46:57,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:46:57,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251962938] [2021-11-02 19:46:57,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251962938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:46:57,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:46:57,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 19:46:57,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449174413] [2021-11-02 19:46:57,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 19:46:57,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:46:57,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 19:46:57,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:46:57,950 INFO L87 Difference]: Start difference. First operand 2658 states and 3907 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 19:47:01,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:47:02,910 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:47:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:47:06,002 INFO L93 Difference]: Finished difference Result 6638 states and 9810 transitions. [2021-11-02 19:47:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 19:47:06,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 19:47:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:47:06,017 INFO L225 Difference]: With dead ends: 6638 [2021-11-02 19:47:06,018 INFO L226 Difference]: Without dead ends: 4039 [2021-11-02 19:47:06,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.42ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:47:06,025 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1763 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 6607 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7095.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.10ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7917.39ms IncrementalHoareTripleChecker+Time [2021-11-02 19:47:06,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1763 Valid, 0 Invalid, 6609 Unknown, 0 Unchecked, 8.10ms Time], IncrementalHoareTripleChecker [2 Valid, 6607 Invalid, 0 Unknown, 0 Unchecked, 7917.39ms Time] [2021-11-02 19:47:06,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2021-11-02 19:47:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 4032. [2021-11-02 19:47:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4032 states, 4031 states have (on average 1.4792855370875713) internal successors, (5963), 4031 states have internal predecessors, (5963), 0 states have call successors, (0), 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 19:47:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4032 states to 4032 states and 5963 transitions. [2021-11-02 19:47:06,126 INFO L78 Accepts]: Start accepts. Automaton has 4032 states and 5963 transitions. Word has length 89 [2021-11-02 19:47:06,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:47:06,126 INFO L470 AbstractCegarLoop]: Abstraction has 4032 states and 5963 transitions. [2021-11-02 19:47:06,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 19:47:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4032 states and 5963 transitions. [2021-11-02 19:47:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 19:47:06,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:47:06,140 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-02 19:47:06,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 19:47:06,143 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:47:06,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:47:06,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1289383257, now seen corresponding path program 1 times [2021-11-02 19:47:06,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:47:06,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088182927] [2021-11-02 19:47:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:47:06,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:47:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:47:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 19:47:06,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:47:06,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088182927] [2021-11-02 19:47:06,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088182927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:47:06,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:47:06,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 19:47:06,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069661724] [2021-11-02 19:47:06,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 19:47:06,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:47:06,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 19:47:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:47:06,334 INFO L87 Difference]: Start difference. First operand 4032 states and 5963 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 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 19:47:08,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:47:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:47:10,414 INFO L93 Difference]: Finished difference Result 8005 states and 11858 transitions. [2021-11-02 19:47:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 19:47:10,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-02 19:47:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:47:10,426 INFO L225 Difference]: With dead ends: 8005 [2021-11-02 19:47:10,426 INFO L226 Difference]: Without dead ends: 4032 [2021-11-02 19:47:10,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.38ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:47:10,432 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2597 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2660 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3567.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2597 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3979.12ms IncrementalHoareTripleChecker+Time [2021-11-02 19:47:10,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2597 Valid, 0 Invalid, 2660 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [0 Valid, 2660 Invalid, 0 Unknown, 0 Unchecked, 3979.12ms Time] [2021-11-02 19:47:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4032 states. [2021-11-02 19:47:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4032 to 4032. [2021-11-02 19:47:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4032 states, 4031 states have (on average 1.478293227486976) internal successors, (5959), 4031 states have internal predecessors, (5959), 0 states have call successors, (0), 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 19:47:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4032 states to 4032 states and 5959 transitions. [2021-11-02 19:47:10,502 INFO L78 Accepts]: Start accepts. Automaton has 4032 states and 5959 transitions. Word has length 100 [2021-11-02 19:47:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:47:10,502 INFO L470 AbstractCegarLoop]: Abstraction has 4032 states and 5959 transitions. [2021-11-02 19:47:10,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 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 19:47:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4032 states and 5959 transitions. [2021-11-02 19:47:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 19:47:10,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:47:10,505 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-02 19:47:10,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 19:47:10,505 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:47:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:47:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1948914779, now seen corresponding path program 1 times [2021-11-02 19:47:10,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:47:10,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617683306] [2021-11-02 19:47:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:47:10,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:47:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:47:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 19:47:10,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:47:10,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617683306] [2021-11-02 19:47:10,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617683306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:47:10,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:47:10,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 19:47:10,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982447296] [2021-11-02 19:47:10,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 19:47:10,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:47:10,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 19:47:10,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 19:47:10,586 INFO L87 Difference]: Start difference. First operand 4032 states and 5959 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 19:47:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:47:18,217 INFO L93 Difference]: Finished difference Result 8013 states and 11858 transitions. [2021-11-02 19:47:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 19:47:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-02 19:47:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:47:18,229 INFO L225 Difference]: With dead ends: 8013 [2021-11-02 19:47:18,229 INFO L226 Difference]: Without dead ends: 4032 [2021-11-02 19:47:18,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.31ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 19:47:18,234 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 5311 mSDsCounter, 0 mSdLazyCounter, 7979 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6753.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7513.54ms IncrementalHoareTripleChecker+Time [2021-11-02 19:47:18,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 7979 Unknown, 0 Unchecked, 8.00ms Time], IncrementalHoareTripleChecker [0 Valid, 7979 Invalid, 0 Unknown, 0 Unchecked, 7513.54ms Time] [2021-11-02 19:47:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4032 states. [2021-11-02 19:47:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4032 to 4032. [2021-11-02 19:47:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4032 states, 4031 states have (on average 1.4773009178863805) internal successors, (5955), 4031 states have internal predecessors, (5955), 0 states have call successors, (0), 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 19:47:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4032 states to 4032 states and 5955 transitions. [2021-11-02 19:47:18,295 INFO L78 Accepts]: Start accepts. Automaton has 4032 states and 5955 transitions. Word has length 100 [2021-11-02 19:47:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:47:18,295 INFO L470 AbstractCegarLoop]: Abstraction has 4032 states and 5955 transitions. [2021-11-02 19:47:18,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 19:47:18,296 INFO L276 IsEmpty]: Start isEmpty. Operand 4032 states and 5955 transitions. [2021-11-02 19:47:18,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-02 19:47:18,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:47:18,298 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-02 19:47:18,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 19:47:18,298 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:47:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:47:18,299 INFO L85 PathProgramCache]: Analyzing trace with hash -343819490, now seen corresponding path program 1 times [2021-11-02 19:47:18,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:47:18,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478209266] [2021-11-02 19:47:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:47:18,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:47:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:47:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 19:47:18,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:47:18,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478209266] [2021-11-02 19:47:18,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478209266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 19:47:18,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296891863] [2021-11-02 19:47:18,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:47:18,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 19:47:18,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 19:47:18,392 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 19:47:18,393 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 19:47:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:47:18,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1389 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 19:47:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 19:47:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 19:47:18,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 19:47:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 19:47:19,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296891863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 19:47:19,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 19:47:19,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-02 19:47:19,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869969676] [2021-11-02 19:47:19,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 19:47:19,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:47:19,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 19:47:19,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 19:47:19,170 INFO L87 Difference]: Start difference. First operand 4032 states and 5955 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 19:47:25,672 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:47:28,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:47:28,463 INFO L93 Difference]: Finished difference Result 8052 states and 11916 transitions. [2021-11-02 19:47:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 19:47:28,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 103 [2021-11-02 19:47:28,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:47:28,474 INFO L225 Difference]: With dead ends: 8052 [2021-11-02 19:47:28,474 INFO L226 Difference]: Without dead ends: 4053 [2021-11-02 19:47:28,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.86ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 19:47:28,479 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 5276 mSDsCounter, 0 mSdLazyCounter, 7981 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8386.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.75ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 7981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9156.29ms IncrementalHoareTripleChecker+Time [2021-11-02 19:47:28,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 8051 Unknown, 0 Unchecked, 8.75ms Time], IncrementalHoareTripleChecker [70 Valid, 7981 Invalid, 0 Unknown, 0 Unchecked, 9156.29ms Time] [2021-11-02 19:47:28,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-11-02 19:47:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 4053. [2021-11-02 19:47:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 1.474827245804541) internal successors, (5976), 4052 states have internal predecessors, (5976), 0 states have call successors, (0), 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 19:47:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 5976 transitions. [2021-11-02 19:47:28,556 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 5976 transitions. Word has length 103 [2021-11-02 19:47:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:47:28,557 INFO L470 AbstractCegarLoop]: Abstraction has 4053 states and 5976 transitions. [2021-11-02 19:47:28,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 19:47:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 5976 transitions. [2021-11-02 19:47:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-02 19:47:28,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:47:28,560 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2021-11-02 19:47:28,582 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 19:47:28,768 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 19:47:28,769 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:47:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:47:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1433033897, now seen corresponding path program 2 times [2021-11-02 19:47:28,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:47:28,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508217443] [2021-11-02 19:47:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:47:28,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:47:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:47:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-02 19:47:28,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:47:28,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508217443] [2021-11-02 19:47:28,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508217443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 19:47:28,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244876054] [2021-11-02 19:47:28,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 19:47:28,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 19:47:28,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 19:47:28,933 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 19:47:28,934 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 19:47:29,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 19:47:29,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 19:47:29,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 19:47:29,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 19:47:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-02 19:47:29,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 19:47:29,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244876054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:47:29,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 19:47:29,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-02 19:47:29,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497370984] [2021-11-02 19:47:29,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 19:47:29,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:47:29,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 19:47:29,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-02 19:47:29,522 INFO L87 Difference]: Start difference. First operand 4053 states and 5976 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 19:47:31,646 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:47:35,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:47:37,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:47:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:47:44,195 INFO L93 Difference]: Finished difference Result 8030 states and 11867 transitions. [2021-11-02 19:47:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 19:47:44,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 124 [2021-11-02 19:47:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:47:44,213 INFO L225 Difference]: With dead ends: 8030 [2021-11-02 19:47:44,213 INFO L226 Difference]: Without dead ends: 8028 [2021-11-02 19:47:44,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 32.59ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-02 19:47:44,216 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4937 mSDsluCounter, 5558 mSDsCounter, 0 mSdLazyCounter, 10820 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13196.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4937 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14444.99ms IncrementalHoareTripleChecker+Time [2021-11-02 19:47:44,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4937 Valid, 0 Invalid, 10821 Unknown, 0 Unchecked, 20.97ms Time], IncrementalHoareTripleChecker [1 Valid, 10820 Invalid, 0 Unknown, 0 Unchecked, 14444.99ms Time] [2021-11-02 19:47:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2021-11-02 19:47:44,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 4057. [2021-11-02 19:47:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4057 states, 4056 states have (on average 1.4743589743589745) internal successors, (5980), 4056 states have internal predecessors, (5980), 0 states have call successors, (0), 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 19:47:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4057 states to 4057 states and 5980 transitions. [2021-11-02 19:47:44,313 INFO L78 Accepts]: Start accepts. Automaton has 4057 states and 5980 transitions. Word has length 124 [2021-11-02 19:47:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:47:44,313 INFO L470 AbstractCegarLoop]: Abstraction has 4057 states and 5980 transitions. [2021-11-02 19:47:44,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 19:47:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4057 states and 5980 transitions. [2021-11-02 19:47:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-02 19:47:44,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:47:44,317 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2021-11-02 19:47:44,338 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 19:47:44,523 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,SelfDestructingSolverStorable8 [2021-11-02 19:47:44,524 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:47:44,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:47:44,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1887668944, now seen corresponding path program 1 times [2021-11-02 19:47:44,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:47:44,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017997271] [2021-11-02 19:47:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:47:44,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:47:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:47:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-02 19:47:44,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:47:44,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017997271] [2021-11-02 19:47:44,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017997271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:47:44,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:47:44,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 19:47:44,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057471734] [2021-11-02 19:47:44,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 19:47:44,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:47:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 19:47:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 19:47:44,653 INFO L87 Difference]: Start difference. First operand 4057 states and 5980 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 19:47:47,273 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:47:49,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:47:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:47:55,151 INFO L93 Difference]: Finished difference Result 12011 states and 17762 transitions. [2021-11-02 19:47:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 19:47:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 131 [2021-11-02 19:47:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:47:55,166 INFO L225 Difference]: With dead ends: 12011 [2021-11-02 19:47:55,167 INFO L226 Difference]: Without dead ends: 8034 [2021-11-02 19:47:55,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.05ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 19:47:55,175 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 5156 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 7666 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9193.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5156 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10262.00ms IncrementalHoareTripleChecker+Time [2021-11-02 19:47:55,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5156 Valid, 0 Invalid, 7667 Unknown, 0 Unchecked, 11.47ms Time], IncrementalHoareTripleChecker [1 Valid, 7666 Invalid, 0 Unknown, 0 Unchecked, 10262.00ms Time] [2021-11-02 19:47:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8034 states. [2021-11-02 19:47:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8034 to 4059. [2021-11-02 19:47:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4059 states, 4058 states have (on average 1.4741251848201085) internal successors, (5982), 4058 states have internal predecessors, (5982), 0 states have call successors, (0), 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 19:47:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4059 states to 4059 states and 5982 transitions. [2021-11-02 19:47:55,329 INFO L78 Accepts]: Start accepts. Automaton has 4059 states and 5982 transitions. Word has length 131 [2021-11-02 19:47:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:47:55,329 INFO L470 AbstractCegarLoop]: Abstraction has 4059 states and 5982 transitions. [2021-11-02 19:47:55,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 19:47:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4059 states and 5982 transitions. [2021-11-02 19:47:55,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-02 19:47:55,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:47:55,333 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2021-11-02 19:47:55,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 19:47:55,334 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:47:55,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:47:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash 792091247, now seen corresponding path program 1 times [2021-11-02 19:47:55,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:47:55,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63013748] [2021-11-02 19:47:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:47:55,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:47:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:47:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-02 19:47:55,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:47:55,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63013748] [2021-11-02 19:47:55,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63013748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 19:47:55,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083879142] [2021-11-02 19:47:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:47:55,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 19:47:55,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 19:47:55,485 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 19:47:55,486 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 19:47:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:47:55,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 1544 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 19:47:55,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 19:47:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-02 19:47:56,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 19:47:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-02 19:47:56,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083879142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 19:47:56,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 19:47:56,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-02 19:47:56,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28011067] [2021-11-02 19:47:56,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 19:47:56,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:47:56,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 19:47:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=148, Unknown=0, NotChecked=0, Total=272 [2021-11-02 19:47:56,432 INFO L87 Difference]: Start difference. First operand 4059 states and 5982 transitions. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 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 19:48:00,337 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:48:04,523 WARN L515 Checker$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 19:48:06,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:48:08,723 WARN L515 Checker$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 19:48:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:48:13,563 INFO L93 Difference]: Finished difference Result 8076 states and 11925 transitions. [2021-11-02 19:48:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 19:48:13,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 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 19:48:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:48:13,571 INFO L225 Difference]: With dead ends: 8076 [2021-11-02 19:48:13,571 INFO L226 Difference]: Without dead ends: 4067 [2021-11-02 19:48:13,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 116.12ms TimeCoverageRelationStatistics Valid=124, Invalid=148, Unknown=0, NotChecked=0, Total=272 [2021-11-02 19:48:13,577 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 13189 mSDsCounter, 0 mSdLazyCounter, 15947 mSolverCounterSat, 53 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15627.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 16003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.53ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 15947 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16919.77ms IncrementalHoareTripleChecker+Time [2021-11-02 19:48:13,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 16003 Unknown, 0 Unchecked, 19.53ms Time], IncrementalHoareTripleChecker [53 Valid, 15947 Invalid, 3 Unknown, 0 Unchecked, 16919.77ms Time] [2021-11-02 19:48:13,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2021-11-02 19:48:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 4067. [2021-11-02 19:48:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4067 states, 4066 states have (on average 1.47319232661092) internal successors, (5990), 4066 states have internal predecessors, (5990), 0 states have call successors, (0), 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 19:48:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4067 states to 4067 states and 5990 transitions. [2021-11-02 19:48:13,659 INFO L78 Accepts]: Start accepts. Automaton has 4067 states and 5990 transitions. Word has length 133 [2021-11-02 19:48:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:48:13,659 INFO L470 AbstractCegarLoop]: Abstraction has 4067 states and 5990 transitions. [2021-11-02 19:48:13,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 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 19:48:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 4067 states and 5990 transitions. [2021-11-02 19:48:13,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-02 19:48:13,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:48:13,663 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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] [2021-11-02 19:48:13,695 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 19:48:13,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 19:48:13,879 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:48:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:48:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1700478191, now seen corresponding path program 2 times [2021-11-02 19:48:13,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:48:13,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456175279] [2021-11-02 19:48:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:48:13,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:48:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:48:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 19:48:13,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:48:13,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456175279] [2021-11-02 19:48:13,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456175279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:48:13,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:48:13,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 19:48:13,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18220219] [2021-11-02 19:48:13,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 19:48:13,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:48:13,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 19:48:13,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 19:48:13,990 INFO L87 Difference]: Start difference. First operand 4067 states and 5990 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 19:48:18,458 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:48:20,445 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:48:21,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:48:25,011 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:48:31,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:48:40,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:48:44,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:48:44,869 INFO L93 Difference]: Finished difference Result 15322 states and 22674 transitions. [2021-11-02 19:48:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 19:48:44,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 19:48:44,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:48:44,894 INFO L225 Difference]: With dead ends: 15322 [2021-11-02 19:48:44,894 INFO L226 Difference]: Without dead ends: 15320 [2021-11-02 19:48:44,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.70ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 19:48:44,899 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 9787 mSDsluCounter, 15151 mSDsCounter, 0 mSdLazyCounter, 22788 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27801.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9787 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.94ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22788 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30298.59ms IncrementalHoareTripleChecker+Time [2021-11-02 19:48:44,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9787 Valid, 0 Invalid, 22792 Unknown, 0 Unchecked, 37.94ms Time], IncrementalHoareTripleChecker [2 Valid, 22788 Invalid, 2 Unknown, 0 Unchecked, 30298.59ms Time] [2021-11-02 19:48:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15320 states. [2021-11-02 19:48:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15320 to 4069. [2021-11-02 19:48:45,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4069 states, 4068 states have (on average 1.4729596853490659) internal successors, (5992), 4068 states have internal predecessors, (5992), 0 states have call successors, (0), 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 19:48:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 5992 transitions. [2021-11-02 19:48:45,051 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 5992 transitions. Word has length 141 [2021-11-02 19:48:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:48:45,052 INFO L470 AbstractCegarLoop]: Abstraction has 4069 states and 5992 transitions. [2021-11-02 19:48:45,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 19:48:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 5992 transitions. [2021-11-02 19:48:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-02 19:48:45,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:48:45,059 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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] [2021-11-02 19:48:45,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 19:48:45,059 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:48:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:48:45,059 INFO L85 PathProgramCache]: Analyzing trace with hash 44949227, now seen corresponding path program 1 times [2021-11-02 19:48:45,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:48:45,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146275240] [2021-11-02 19:48:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:48:45,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:48:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:48:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-02 19:48:45,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:48:45,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146275240] [2021-11-02 19:48:45,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146275240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:48:45,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:48:45,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 19:48:45,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882921822] [2021-11-02 19:48:45,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 19:48:45,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:48:45,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 19:48:45,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:48:45,154 INFO L87 Difference]: Start difference. First operand 4069 states and 5992 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 19:48:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:48:49,711 INFO L93 Difference]: Finished difference Result 8290 states and 12231 transitions. [2021-11-02 19:48:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 19:48:49,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 155 [2021-11-02 19:48:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:48:49,718 INFO L225 Difference]: With dead ends: 8290 [2021-11-02 19:48:49,719 INFO L226 Difference]: Without dead ends: 4309 [2021-11-02 19:48:49,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.26ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:48:49,724 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2557 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 3408 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3724.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2557 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4327.40ms IncrementalHoareTripleChecker+Time [2021-11-02 19:48:49,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2557 Valid, 0 Invalid, 3408 Unknown, 0 Unchecked, 3.76ms Time], IncrementalHoareTripleChecker [0 Valid, 3408 Invalid, 0 Unknown, 0 Unchecked, 4327.40ms Time] [2021-11-02 19:48:49,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2021-11-02 19:48:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 4069. [2021-11-02 19:48:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4069 states, 4068 states have (on average 1.4724680432645034) internal successors, (5990), 4068 states have internal predecessors, (5990), 0 states have call successors, (0), 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 19:48:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 5990 transitions. [2021-11-02 19:48:49,857 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 5990 transitions. Word has length 155 [2021-11-02 19:48:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:48:49,857 INFO L470 AbstractCegarLoop]: Abstraction has 4069 states and 5990 transitions. [2021-11-02 19:48:49,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 19:48:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 5990 transitions. [2021-11-02 19:48:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-02 19:48:49,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:48:49,864 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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] [2021-11-02 19:48:49,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 19:48:49,864 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:48:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:48:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1493357201, now seen corresponding path program 1 times [2021-11-02 19:48:49,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:48:49,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463346585] [2021-11-02 19:48:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:48:49,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:48:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:48:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 19:48:49,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:48:49,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463346585] [2021-11-02 19:48:49,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463346585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:48:49,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:48:49,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 19:48:49,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355567215] [2021-11-02 19:48:49,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 19:48:50,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:48:50,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 19:48:50,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 19:48:50,001 INFO L87 Difference]: Start difference. First operand 4069 states and 5990 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 19:48:52,307 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:48:53,610 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:48:55,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:00,189 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:49:02,662 INFO L93 Difference]: Finished difference Result 12029 states and 17774 transitions. [2021-11-02 19:49:02,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 19:49:02,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 157 [2021-11-02 19:49:02,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:49:02,676 INFO L225 Difference]: With dead ends: 12029 [2021-11-02 19:49:02,676 INFO L226 Difference]: Without dead ends: 8048 [2021-11-02 19:49:02,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.30ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 19:49:02,683 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 5144 mSDsluCounter, 2642 mSDsCounter, 0 mSdLazyCounter, 7882 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11282.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.48ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12306.60ms IncrementalHoareTripleChecker+Time [2021-11-02 19:49:02,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5144 Valid, 0 Invalid, 7884 Unknown, 0 Unchecked, 10.48ms Time], IncrementalHoareTripleChecker [2 Valid, 7882 Invalid, 0 Unknown, 0 Unchecked, 12306.60ms Time] [2021-11-02 19:49:02,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8048 states. [2021-11-02 19:49:02,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8048 to 4077. [2021-11-02 19:49:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4077 states, 4076 states have (on average 1.4720314033366044) internal successors, (6000), 4076 states have internal predecessors, (6000), 0 states have call successors, (0), 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 19:49:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 6000 transitions. [2021-11-02 19:49:02,862 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 6000 transitions. Word has length 157 [2021-11-02 19:49:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:49:02,863 INFO L470 AbstractCegarLoop]: Abstraction has 4077 states and 6000 transitions. [2021-11-02 19:49:02,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 19:49:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 6000 transitions. [2021-11-02 19:49:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-02 19:49:02,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:49:02,870 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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] [2021-11-02 19:49:02,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 19:49:02,871 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:49:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:49:02,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1712866833, now seen corresponding path program 1 times [2021-11-02 19:49:02,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:49:02,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389249972] [2021-11-02 19:49:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:49:02,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:49:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:49:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-02 19:49:02,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:49:02,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389249972] [2021-11-02 19:49:02,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389249972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:49:02,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:49:02,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 19:49:02,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324220337] [2021-11-02 19:49:02,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 19:49:02,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:49:02,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 19:49:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:49:02,966 INFO L87 Difference]: Start difference. First operand 4077 states and 6000 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 19:49:06,681 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:49:08,692 INFO L93 Difference]: Finished difference Result 8104 states and 11941 transitions. [2021-11-02 19:49:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 19:49:08,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 160 [2021-11-02 19:49:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:49:08,697 INFO L225 Difference]: With dead ends: 8104 [2021-11-02 19:49:08,697 INFO L226 Difference]: Without dead ends: 4115 [2021-11-02 19:49:08,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.12ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:49:08,700 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 2478 mSDsCounter, 0 mSdLazyCounter, 5194 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4992.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.14ms SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 5194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5546.91ms IncrementalHoareTripleChecker+Time [2021-11-02 19:49:08,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 5297 Unknown, 0 Unchecked, 5.14ms Time], IncrementalHoareTripleChecker [103 Valid, 5194 Invalid, 0 Unknown, 0 Unchecked, 5546.91ms Time] [2021-11-02 19:49:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2021-11-02 19:49:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 4077. [2021-11-02 19:49:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4077 states, 4076 states have (on average 1.444062806673209) internal successors, (5886), 4076 states have internal predecessors, (5886), 0 states have call successors, (0), 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 19:49:08,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 5886 transitions. [2021-11-02 19:49:08,822 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 5886 transitions. Word has length 160 [2021-11-02 19:49:08,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:49:08,823 INFO L470 AbstractCegarLoop]: Abstraction has 4077 states and 5886 transitions. [2021-11-02 19:49:08,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 19:49:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 5886 transitions. [2021-11-02 19:49:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-02 19:49:08,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:49:08,829 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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] [2021-11-02 19:49:08,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 19:49:08,830 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:49:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:49:08,830 INFO L85 PathProgramCache]: Analyzing trace with hash -618587703, now seen corresponding path program 1 times [2021-11-02 19:49:08,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:49:08,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391920765] [2021-11-02 19:49:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:49:08,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:49:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:49:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 19:49:08,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:49:08,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391920765] [2021-11-02 19:49:08,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391920765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 19:49:08,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904699909] [2021-11-02 19:49:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:49:08,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 19:49:08,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 19:49:08,957 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 19:49:08,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 19:49:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:49:09,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 19:49:09,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 19:49:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 19:49:09,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 19:49:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 19:49:09,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904699909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 19:49:09,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 19:49:09,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-11-02 19:49:09,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492265770] [2021-11-02 19:49:09,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 19:49:09,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:49:09,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 19:49:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-11-02 19:49:09,921 INFO L87 Difference]: Start difference. First operand 4077 states and 5886 transitions. Second operand has 10 states, 10 states have (on average 24.7) internal successors, (247), 9 states have internal predecessors, (247), 0 states have call successors, (0), 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 19:49:13,159 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:15,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:27,367 WARN L515 Checker$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 19:49:28,738 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:31,645 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:35,714 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:38,189 WARN L515 Checker$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 19:49:43,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:46,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:48,436 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:57,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:49:59,768 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 19:50:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:50:04,810 INFO L93 Difference]: Finished difference Result 43603 states and 63324 transitions. [2021-11-02 19:50:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 19:50:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 24.7) internal successors, (247), 9 states have internal predecessors, (247), 0 states have call successors, (0), 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 163 [2021-11-02 19:50:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:50:04,868 INFO L225 Difference]: With dead ends: 43603 [2021-11-02 19:50:04,869 INFO L226 Difference]: Without dead ends: 39614 [2021-11-02 19:50:04,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 47.99ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-11-02 19:50:04,882 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 25853 mSDsluCounter, 35235 mSDsCounter, 0 mSdLazyCounter, 40293 mSolverCounterSat, 19 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47981.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25853 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 84.54ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 40293 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52811.57ms IncrementalHoareTripleChecker+Time [2021-11-02 19:50:04,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25853 Valid, 0 Invalid, 40317 Unknown, 0 Unchecked, 84.54ms Time], IncrementalHoareTripleChecker [19 Valid, 40293 Invalid, 5 Unknown, 0 Unchecked, 52811.57ms Time] [2021-11-02 19:50:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39614 states. [2021-11-02 19:50:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39614 to 11743. [2021-11-02 19:50:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 1.4519672968829842) internal successors, (17049), 11742 states have internal predecessors, (17049), 0 states have call successors, (0), 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 19:50:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 17049 transitions. [2021-11-02 19:50:05,484 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 17049 transitions. Word has length 163 [2021-11-02 19:50:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:50:05,484 INFO L470 AbstractCegarLoop]: Abstraction has 11743 states and 17049 transitions. [2021-11-02 19:50:05,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.7) internal successors, (247), 9 states have internal predecessors, (247), 0 states have call successors, (0), 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 19:50:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 17049 transitions. [2021-11-02 19:50:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-02 19:50:05,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:50:05,496 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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] [2021-11-02 19:50:05,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 19:50:05,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 19:50:05,707 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:50:05,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:50:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1558820106, now seen corresponding path program 1 times [2021-11-02 19:50:05,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:50:05,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588051981] [2021-11-02 19:50:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:50:05,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:50:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:50:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-02 19:50:05,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:50:05,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588051981] [2021-11-02 19:50:05,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588051981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:50:05,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:50:05,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 19:50:05,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831224775] [2021-11-02 19:50:05,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 19:50:05,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:50:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 19:50:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 19:50:05,977 INFO L87 Difference]: Start difference. First operand 11743 states and 17049 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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 19:50:09,564 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:50:10,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:50:14,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:50:15,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:50:19,347 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:50:21,672 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:50:23,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:50:32,248 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:50:42,825 WARN L515 Checker$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 19:50:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:50:44,836 INFO L93 Difference]: Finished difference Result 56530 states and 82272 transitions. [2021-11-02 19:50:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 19:50:44,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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 168 [2021-11-02 19:50:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:50:44,904 INFO L225 Difference]: With dead ends: 56530 [2021-11-02 19:50:44,904 INFO L226 Difference]: Without dead ends: 44831 [2021-11-02 19:50:44,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 92.54ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-02 19:50:44,926 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 15231 mSDsluCounter, 23338 mSDsCounter, 0 mSdLazyCounter, 28493 mSolverCounterSat, 40 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33855.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15231 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 58.90ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 28493 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36637.58ms IncrementalHoareTripleChecker+Time [2021-11-02 19:50:44,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15231 Valid, 0 Invalid, 28536 Unknown, 0 Unchecked, 58.90ms Time], IncrementalHoareTripleChecker [40 Valid, 28493 Invalid, 3 Unknown, 0 Unchecked, 36637.58ms Time] [2021-11-02 19:50:44,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44831 states. [2021-11-02 19:50:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44831 to 11743. [2021-11-02 19:50:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 1.4512859819451542) internal successors, (17041), 11742 states have internal predecessors, (17041), 0 states have call successors, (0), 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 19:50:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 17041 transitions. [2021-11-02 19:50:45,697 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 17041 transitions. Word has length 168 [2021-11-02 19:50:45,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:50:45,697 INFO L470 AbstractCegarLoop]: Abstraction has 11743 states and 17041 transitions. [2021-11-02 19:50:45,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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 19:50:45,697 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 17041 transitions. [2021-11-02 19:50:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-02 19:50:45,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:50:45,708 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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] [2021-11-02 19:50:45,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 19:50:45,709 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:50:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:50:45,709 INFO L85 PathProgramCache]: Analyzing trace with hash 504462482, now seen corresponding path program 1 times [2021-11-02 19:50:45,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:50:45,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374126945] [2021-11-02 19:50:45,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:50:45,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:50:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:50:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 19:50:45,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:50:45,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374126945] [2021-11-02 19:50:45,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374126945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:50:45,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:50:45,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 19:50:45,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547112268] [2021-11-02 19:50:45,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 19:50:45,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:50:45,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 19:50:45,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 19:50:45,906 INFO L87 Difference]: Start difference. First operand 11743 states and 17041 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 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 19:50:48,830 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:50:51,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:50:56,768 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:50:58,875 WARN L515 Checker$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 19:51:04,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:51:05,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:51:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:51:08,862 INFO L93 Difference]: Finished difference Result 44640 states and 64927 transitions. [2021-11-02 19:51:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 19:51:08,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 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 170 [2021-11-02 19:51:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:51:08,913 INFO L225 Difference]: With dead ends: 44640 [2021-11-02 19:51:08,913 INFO L226 Difference]: Without dead ends: 32985 [2021-11-02 19:51:08,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.81ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 19:51:08,930 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 6930 mSDsluCounter, 7525 mSDsCounter, 0 mSdLazyCounter, 12488 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19629.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6930 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 12491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.84ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12488 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21163.87ms IncrementalHoareTripleChecker+Time [2021-11-02 19:51:08,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6930 Valid, 0 Invalid, 12491 Unknown, 0 Unchecked, 20.84ms Time], IncrementalHoareTripleChecker [1 Valid, 12488 Invalid, 2 Unknown, 0 Unchecked, 21163.87ms Time] [2021-11-02 19:51:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32985 states. [2021-11-02 19:51:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32985 to 11755. [2021-11-02 19:51:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11755 states, 11754 states have (on average 1.4508252509783903) internal successors, (17053), 11754 states have internal predecessors, (17053), 0 states have call successors, (0), 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 19:51:09,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11755 states to 11755 states and 17053 transitions. [2021-11-02 19:51:09,705 INFO L78 Accepts]: Start accepts. Automaton has 11755 states and 17053 transitions. Word has length 170 [2021-11-02 19:51:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:51:09,705 INFO L470 AbstractCegarLoop]: Abstraction has 11755 states and 17053 transitions. [2021-11-02 19:51:09,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 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 19:51:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 11755 states and 17053 transitions. [2021-11-02 19:51:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-02 19:51:09,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:51:09,715 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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] [2021-11-02 19:51:09,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 19:51:09,716 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:51:09,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:51:09,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2118943683, now seen corresponding path program 1 times [2021-11-02 19:51:09,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:51:09,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984472690] [2021-11-02 19:51:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:51:09,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:51:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:51:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 19:51:09,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:51:09,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984472690] [2021-11-02 19:51:09,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984472690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:51:09,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:51:09,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 19:51:09,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625328594] [2021-11-02 19:51:09,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 19:51:09,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:51:09,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 19:51:09,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:51:09,824 INFO L87 Difference]: Start difference. First operand 11755 states and 17053 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 19:51:12,302 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:51:15,764 WARN L515 Checker$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 19:51:20,119 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:51:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:51:23,185 INFO L93 Difference]: Finished difference Result 34111 states and 49584 transitions. [2021-11-02 19:51:23,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 19:51:23,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 172 [2021-11-02 19:51:23,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:51:23,220 INFO L225 Difference]: With dead ends: 34111 [2021-11-02 19:51:23,221 INFO L226 Difference]: Without dead ends: 22444 [2021-11-02 19:51:23,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.01ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 19:51:23,234 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2334 mSDsluCounter, 2589 mSDsCounter, 0 mSdLazyCounter, 7535 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10981.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2334 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.65ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7535 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11978.70ms IncrementalHoareTripleChecker+Time [2021-11-02 19:51:23,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2334 Valid, 0 Invalid, 7542 Unknown, 0 Unchecked, 7.65ms Time], IncrementalHoareTripleChecker [6 Valid, 7535 Invalid, 1 Unknown, 0 Unchecked, 11978.70ms Time] [2021-11-02 19:51:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22444 states. [2021-11-02 19:51:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22444 to 11767. [2021-11-02 19:51:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11767 states, 11766 states have (on average 1.450365459799422) internal successors, (17065), 11766 states have internal predecessors, (17065), 0 states have call successors, (0), 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 19:51:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11767 states to 11767 states and 17065 transitions. [2021-11-02 19:51:23,967 INFO L78 Accepts]: Start accepts. Automaton has 11767 states and 17065 transitions. Word has length 172 [2021-11-02 19:51:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:51:23,968 INFO L470 AbstractCegarLoop]: Abstraction has 11767 states and 17065 transitions. [2021-11-02 19:51:23,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 19:51:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 11767 states and 17065 transitions. [2021-11-02 19:51:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-02 19:51:23,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:51:23,979 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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] [2021-11-02 19:51:23,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 19:51:23,979 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:51:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:51:23,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1091896970, now seen corresponding path program 1 times [2021-11-02 19:51:23,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:51:23,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125281844] [2021-11-02 19:51:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:51:23,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:51:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:51:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 19:51:24,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:51:24,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125281844] [2021-11-02 19:51:24,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125281844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:51:24,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:51:24,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 19:51:24,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399154439] [2021-11-02 19:51:24,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 19:51:24,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:51:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 19:51:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 19:51:24,129 INFO L87 Difference]: Start difference. First operand 11767 states and 17065 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 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 19:51:28,806 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 19:51:30,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:51:34,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:51:40,394 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:51:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:51:54,800 INFO L93 Difference]: Finished difference Result 78909 states and 114854 transitions. [2021-11-02 19:51:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 19:51:54,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 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 176 [2021-11-02 19:51:54,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:51:54,914 INFO L225 Difference]: With dead ends: 78909 [2021-11-02 19:51:54,915 INFO L226 Difference]: Without dead ends: 67230 [2021-11-02 19:51:54,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.25ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 19:51:54,940 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 16717 mSDsluCounter, 16350 mSDsCounter, 0 mSdLazyCounter, 23501 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23675.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16717 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.19ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 23501 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26213.64ms IncrementalHoareTripleChecker+Time [2021-11-02 19:51:54,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16717 Valid, 0 Invalid, 23519 Unknown, 0 Unchecked, 46.19ms Time], IncrementalHoareTripleChecker [16 Valid, 23501 Invalid, 2 Unknown, 0 Unchecked, 26213.64ms Time] [2021-11-02 19:51:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67230 states. [2021-11-02 19:51:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67230 to 11785. [2021-11-02 19:51:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11785 states, 11784 states have (on average 1.4496775288526815) internal successors, (17083), 11784 states have internal predecessors, (17083), 0 states have call successors, (0), 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 19:51:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11785 states to 11785 states and 17083 transitions. [2021-11-02 19:51:56,089 INFO L78 Accepts]: Start accepts. Automaton has 11785 states and 17083 transitions. Word has length 176 [2021-11-02 19:51:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:51:56,089 INFO L470 AbstractCegarLoop]: Abstraction has 11785 states and 17083 transitions. [2021-11-02 19:51:56,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 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 19:51:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 11785 states and 17083 transitions. [2021-11-02 19:51:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-02 19:51:56,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:51:56,099 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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 19:51:56,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 19:51:56,100 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:51:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:51:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash 580674734, now seen corresponding path program 1 times [2021-11-02 19:51:56,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:51:56,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805668041] [2021-11-02 19:51:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:51:56,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:51:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:51:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-02 19:51:56,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:51:56,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805668041] [2021-11-02 19:51:56,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805668041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:51:56,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 19:51:56,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 19:51:56,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033648215] [2021-11-02 19:51:56,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 19:51:56,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:51:56,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 19:51:56,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 19:51:56,551 INFO L87 Difference]: Start difference. First operand 11785 states and 17083 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 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 19:52:01,076 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 19:52:03,838 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:52:06,093 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:52:12,940 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:52:14,210 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:52:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:52:21,063 INFO L93 Difference]: Finished difference Result 35185 states and 51053 transitions. [2021-11-02 19:52:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 19:52:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 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 178 [2021-11-02 19:52:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:52:21,094 INFO L225 Difference]: With dead ends: 35185 [2021-11-02 19:52:21,094 INFO L226 Difference]: Without dead ends: 23448 [2021-11-02 19:52:21,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.69ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 19:52:21,111 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2542 mSDsluCounter, 12892 mSDsCounter, 0 mSdLazyCounter, 18060 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20995.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2542 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 18064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18060 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22661.44ms IncrementalHoareTripleChecker+Time [2021-11-02 19:52:21,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2542 Valid, 0 Invalid, 18064 Unknown, 0 Unchecked, 21.61ms Time], IncrementalHoareTripleChecker [1 Valid, 18060 Invalid, 3 Unknown, 0 Unchecked, 22661.44ms Time] [2021-11-02 19:52:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23448 states. [2021-11-02 19:52:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23448 to 11785. [2021-11-02 19:52:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11785 states, 11784 states have (on average 1.4489986422267482) internal successors, (17075), 11784 states have internal predecessors, (17075), 0 states have call successors, (0), 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 19:52:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11785 states to 11785 states and 17075 transitions. [2021-11-02 19:52:22,055 INFO L78 Accepts]: Start accepts. Automaton has 11785 states and 17075 transitions. Word has length 178 [2021-11-02 19:52:22,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:52:22,055 INFO L470 AbstractCegarLoop]: Abstraction has 11785 states and 17075 transitions. [2021-11-02 19:52:22,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 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 19:52:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 11785 states and 17075 transitions. [2021-11-02 19:52:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-02 19:52:22,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:52:22,065 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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 19:52:22,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 19:52:22,066 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:52:22,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:52:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1113135887, now seen corresponding path program 1 times [2021-11-02 19:52:22,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:52:22,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628900639] [2021-11-02 19:52:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:52:22,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:52:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:52:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-02 19:52:29,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:52:29,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628900639] [2021-11-02 19:52:29,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628900639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 19:52:29,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799749067] [2021-11-02 19:52:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:52:29,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 19:52:29,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 19:52:29,534 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 19:52:29,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 19:52:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:52:32,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-02 19:52:33,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 19:52:33,141 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 6 treesize of output 5 [2021-11-02 19:52:33,422 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 19:52:33,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-11-02 19:52:33,674 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 19:52:33,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-11-02 19:52:34,338 INFO L354 Elim1Store]: treesize reduction 144, result has 16.8 percent of original size [2021-11-02 19:52:34,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 case distinctions, treesize of input 48 treesize of output 64 [2021-11-02 19:52:35,104 INFO L354 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-11-02 19:52:35,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 71 [2021-11-02 19:52:35,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 19:52:35,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-02 19:52:35,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 19:52:35,568 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 19:52:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 19:52:35,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 19:52:35,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-02 19:52:35,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2021-11-02 19:52:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-11-02 19:52:35,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 19:52:35,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:35,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-11-02 19:52:36,550 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-02 19:52:36,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 574 treesize of output 459 [2021-11-02 19:52:37,523 INFO L354 Elim1Store]: treesize reduction 328, result has 14.4 percent of original size [2021-11-02 19:52:37,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 555 treesize of output 459 [2021-11-02 19:52:37,716 INFO L354 Elim1Store]: treesize reduction 646, result has 10.2 percent of original size [2021-11-02 19:52:37,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 416 treesize of output 414 [2021-11-02 19:52:37,788 INFO L354 Elim1Store]: treesize reduction 408, result has 11.3 percent of original size [2021-11-02 19:52:37,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 417 treesize of output 342 [2021-11-02 19:52:37,804 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-02 19:52:37,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 260 treesize of output 236 [2021-11-02 19:52:37,858 INFO L354 Elim1Store]: treesize reduction 318, result has 13.6 percent of original size [2021-11-02 19:52:37,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 212 treesize of output 212 [2021-11-02 19:52:37,867 INFO L354 Elim1Store]: treesize reduction 136, result has 0.7 percent of original size [2021-11-02 19:52:37,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 161 [2021-11-02 19:52:38,439 INFO L354 Elim1Store]: treesize reduction 220, result has 13.7 percent of original size [2021-11-02 19:52:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 238 treesize of output 235 [2021-11-02 19:52:38,530 INFO L354 Elim1Store]: treesize reduction 210, result has 17.6 percent of original size [2021-11-02 19:52:38,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 223 treesize of output 218 [2021-11-02 19:52:38,585 INFO L354 Elim1Store]: treesize reduction 308, result has 14.0 percent of original size [2021-11-02 19:52:38,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 218 treesize of output 214 [2021-11-02 19:52:38,595 INFO L354 Elim1Store]: treesize reduction 136, result has 0.7 percent of original size [2021-11-02 19:52:38,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 199 treesize of output 195 [2021-11-02 19:52:38,920 INFO L354 Elim1Store]: treesize reduction 278, result has 15.2 percent of original size [2021-11-02 19:52:38,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 133 treesize of output 144 [2021-11-02 19:52:38,958 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-02 19:52:38,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 110 [2021-11-02 19:52:38,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:38,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:38,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:38,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:38,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:38,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:38,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:38,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:38,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2021-11-02 19:52:39,416 INFO L354 Elim1Store]: treesize reduction 396, result has 13.0 percent of original size [2021-11-02 19:52:39,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 139 treesize of output 153 [2021-11-02 19:52:39,450 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-02 19:52:39,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 135 treesize of output 125 [2021-11-02 19:52:39,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:39,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:39,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:39,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:39,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:39,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:39,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:39,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:39,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:39,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2021-11-02 19:52:41,612 INFO L354 Elim1Store]: treesize reduction 658, result has 11.7 percent of original size [2021-11-02 19:52:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 160 treesize of output 190 [2021-11-02 19:52:41,651 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-02 19:52:41,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 166 treesize of output 156 [2021-11-02 19:52:41,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:41,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:41,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:41,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:41,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:41,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:41,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:41,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:41,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:41,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:41,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2021-11-02 19:52:42,939 INFO L354 Elim1Store]: treesize reduction 672, result has 10.3 percent of original size [2021-11-02 19:52:42,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 162 treesize of output 182 [2021-11-02 19:52:42,977 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-02 19:52:42,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 158 treesize of output 148 [2021-11-02 19:52:43,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:43,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:43,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:43,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:43,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:43,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:43,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:52:43,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2021-11-02 19:52:44,169 INFO L354 Elim1Store]: treesize reduction 496, result has 12.4 percent of original size [2021-11-02 19:52:44,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 694 treesize of output 519 [2021-11-02 19:52:44,180 INFO L354 Elim1Store]: treesize reduction 232, result has 0.4 percent of original size [2021-11-02 19:52:44,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 675 treesize of output 402 [2021-11-02 19:52:44,339 INFO L354 Elim1Store]: treesize reduction 272, result has 12.3 percent of original size [2021-11-02 19:52:44,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 387 treesize of output 275 [2021-11-02 19:52:44,351 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-02 19:52:44,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 282 treesize of output 205 [2021-11-02 19:52:44,361 INFO L354 Elim1Store]: treesize reduction 416, result has 0.2 percent of original size [2021-11-02 19:52:44,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 244 treesize of output 168 [2021-11-02 19:52:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-02 19:52:44,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 19:52:44,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799749067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:52:44,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 19:52:44,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [35] total 64 [2021-11-02 19:52:44,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277481109] [2021-11-02 19:52:44,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 19:52:44,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:52:44,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 19:52:44,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3854, Unknown=3, NotChecked=0, Total=4032 [2021-11-02 19:52:44,384 INFO L87 Difference]: Start difference. First operand 11785 states and 17075 transitions. Second operand has 33 states, 33 states have (on average 4.515151515151516) internal successors, (149), 33 states have internal predecessors, (149), 0 states have call successors, (0), 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 19:52:54,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:52:55,777 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:52:57,597 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:52:59,960 WARN L515 Checker$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 19:53:03,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:05,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:07,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:09,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:14,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:32,528 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:33,558 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:35,977 WARN L515 Checker$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 19:53:37,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:39,962 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:44,466 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:46,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:48,622 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:50,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:51,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:53,871 WARN L515 Checker$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 19:53:56,275 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:53:59,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:54:00,806 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:54:10,738 WARN L515 Checker$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 19:54:12,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:54:17,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:54:18,591 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:54:24,574 WARN L515 Checker$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 19:54:26,115 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:54:44,736 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:54:51,481 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:54:54,366 WARN L515 Checker$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 19:54:58,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:01,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:03,466 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:05,340 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:06,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:07,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:13,184 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:16,730 WARN L515 Checker$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 19:55:21,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:22,743 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:24,718 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:26,453 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:28,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:55:33,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:56:01,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:56:03,309 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:56:05,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:56:07,791 WARN L515 Checker$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 19:56:09,101 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:56:17,183 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:56:20,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:56:22,710 WARN L515 Checker$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 19:56:24,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:56:26,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:56:48,383 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:56:58,526 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:57:00,438 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:57:02,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:57:06,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:57:21,357 WARN L515 Checker$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 19:57:23,591 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:57:25,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:57:34,759 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:57:36,201 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:57:38,725 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:57:44,815 WARN L515 Checker$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 19:57:48,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:58:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 19:58:04,416 INFO L93 Difference]: Finished difference Result 87568 states and 124753 transitions. [2021-11-02 19:58:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-02 19:58:04,416 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.515151515151516) internal successors, (149), 33 states have internal predecessors, (149), 0 states have call successors, (0), 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 178 [2021-11-02 19:58:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 19:58:04,574 INFO L225 Difference]: With dead ends: 87568 [2021-11-02 19:58:04,574 INFO L226 Difference]: Without dead ends: 87566 [2021-11-02 19:58:04,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6930 ImplicationChecksByTransitivity, 37453.90ms TimeCoverageRelationStatistics Valid=2231, Invalid=24145, Unknown=30, NotChecked=0, Total=26406 [2021-11-02 19:58:04,606 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 26295 mSDsluCounter, 176081 mSDsCounter, 0 mSdLazyCounter, 168263 mSolverCounterSat, 236 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 262306.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26295 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 206562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 428.08ms SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 168263 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 38035 IncrementalHoareTripleChecker+Unchecked, 278472.56ms IncrementalHoareTripleChecker+Time [2021-11-02 19:58:04,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26295 Valid, 0 Invalid, 206562 Unknown, 0 Unchecked, 428.08ms Time], IncrementalHoareTripleChecker [236 Valid, 168263 Invalid, 28 Unknown, 38035 Unchecked, 278472.56ms Time] [2021-11-02 19:58:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87566 states. [2021-11-02 19:58:06,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87566 to 11905. [2021-11-02 19:58:06,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11905 states, 11904 states have (on average 1.4486727150537635) internal successors, (17245), 11904 states have internal predecessors, (17245), 0 states have call successors, (0), 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 19:58:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11905 states to 11905 states and 17245 transitions. [2021-11-02 19:58:06,480 INFO L78 Accepts]: Start accepts. Automaton has 11905 states and 17245 transitions. Word has length 178 [2021-11-02 19:58:06,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 19:58:06,481 INFO L470 AbstractCegarLoop]: Abstraction has 11905 states and 17245 transitions. [2021-11-02 19:58:06,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.515151515151516) internal successors, (149), 33 states have internal predecessors, (149), 0 states have call successors, (0), 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 19:58:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 11905 states and 17245 transitions. [2021-11-02 19:58:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-02 19:58:06,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 19:58:06,491 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 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 19:58:06,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 19:58:06,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 19:58:06,693 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 19:58:06,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 19:58:06,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1549375156, now seen corresponding path program 1 times [2021-11-02 19:58:06,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 19:58:06,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833797809] [2021-11-02 19:58:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:58:06,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 19:58:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:58:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-02 19:58:08,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 19:58:08,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833797809] [2021-11-02 19:58:08,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833797809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 19:58:08,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353945144] [2021-11-02 19:58:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 19:58:08,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 19:58:08,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 19:58:08,162 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 19:58:08,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 19:58:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 19:58:14,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1913 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-02 19:58:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 19:58:14,412 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 6 treesize of output 5 [2021-11-02 19:58:14,582 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 19:58:14,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-11-02 19:58:14,762 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-02 19:58:14,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 33 [2021-11-02 19:58:15,343 INFO L354 Elim1Store]: treesize reduction 144, result has 16.8 percent of original size [2021-11-02 19:58:15,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 case distinctions, treesize of input 48 treesize of output 64 [2021-11-02 19:58:16,179 INFO L354 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-11-02 19:58:16,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 71 [2021-11-02 19:58:16,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 19:58:16,474 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 19:58:16,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 19:58:16,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-02 19:58:16,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-02 19:58:16,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 19:58:16,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 19:58:16,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-11-02 19:58:16,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 19:58:16,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-11-02 19:58:16,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:16,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2021-11-02 19:58:17,320 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-02 19:58:17,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 574 treesize of output 459 [2021-11-02 19:58:18,327 INFO L354 Elim1Store]: treesize reduction 328, result has 14.4 percent of original size [2021-11-02 19:58:18,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 555 treesize of output 459 [2021-11-02 19:58:18,708 INFO L354 Elim1Store]: treesize reduction 646, result has 10.2 percent of original size [2021-11-02 19:58:18,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 416 treesize of output 414 [2021-11-02 19:58:18,793 INFO L354 Elim1Store]: treesize reduction 408, result has 11.3 percent of original size [2021-11-02 19:58:18,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 417 treesize of output 342 [2021-11-02 19:58:18,910 INFO L354 Elim1Store]: treesize reduction 530, result has 15.7 percent of original size [2021-11-02 19:58:18,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 402 treesize of output 392 [2021-11-02 19:58:18,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 19:58:19,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-02 19:58:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-11-02 19:58:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 55 [2021-11-02 19:58:19,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:19,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 59 [2021-11-02 19:58:19,749 INFO L354 Elim1Store]: treesize reduction 210, result has 17.6 percent of original size [2021-11-02 19:58:19,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 238 treesize of output 233 [2021-11-02 19:58:19,835 INFO L354 Elim1Store]: treesize reduction 308, result has 14.0 percent of original size [2021-11-02 19:58:19,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 233 treesize of output 229 [2021-11-02 19:58:19,844 INFO L354 Elim1Store]: treesize reduction 136, result has 0.7 percent of original size [2021-11-02 19:58:19,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 214 treesize of output 210 [2021-11-02 19:58:19,897 INFO L354 Elim1Store]: treesize reduction 220, result has 13.7 percent of original size [2021-11-02 19:58:19,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 195 treesize of output 192 [2021-11-02 19:58:20,180 INFO L354 Elim1Store]: treesize reduction 278, result has 15.2 percent of original size [2021-11-02 19:58:20,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 133 treesize of output 144 [2021-11-02 19:58:20,220 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-02 19:58:20,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 110 [2021-11-02 19:58:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2021-11-02 19:58:20,632 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-02 19:58:20,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 61 [2021-11-02 19:58:20,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,698 INFO L354 Elim1Store]: treesize reduction 232, result has 9.7 percent of original size [2021-11-02 19:58:20,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 139 treesize of output 153 [2021-11-02 19:58:20,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:20,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 125 [2021-11-02 19:58:24,269 INFO L354 Elim1Store]: treesize reduction 658, result has 11.7 percent of original size [2021-11-02 19:58:24,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 160 treesize of output 190 [2021-11-02 19:58:24,307 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-02 19:58:24,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 145 treesize of output 135 [2021-11-02 19:58:24,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:24,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:24,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:24,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:24,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:24,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:24,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:24,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 19:58:24,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2021-11-02 19:58:24,480 INFO L354 Elim1Store]: treesize reduction 496, result has 12.4 percent of original size [2021-11-02 19:58:24,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 607 treesize of output 456 [2021-11-02 19:58:24,508 INFO L354 Elim1Store]: treesize reduction 232, result has 0.4 percent of original size [2021-11-02 19:58:24,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 588 treesize of output 339 [2021-11-02 19:58:24,579 INFO L354 Elim1Store]: treesize reduction 272, result has 12.3 percent of original size [2021-11-02 19:58:24,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 236 [2021-11-02 19:58:24,588 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-02 19:58:24,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 243 treesize of output 166 [2021-11-02 19:58:24,604 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-11-02 19:58:24,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 205 treesize of output 153 [2021-11-02 19:58:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-02 19:58:24,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 19:58:24,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353945144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 19:58:24,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 19:58:24,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 59 [2021-11-02 19:58:24,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17225626] [2021-11-02 19:58:24,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 19:58:24,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 19:58:24,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 19:58:24,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3253, Unknown=1, NotChecked=0, Total=3422 [2021-11-02 19:58:24,665 INFO L87 Difference]: Start difference. First operand 11905 states and 17245 transitions. Second operand has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 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 19:58:36,248 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:58:44,264 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 19:58:51,527 WARN L515 Checker$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 19:58:53,414 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15